{"id":5192,"date":"2026-02-26T09:33:53","date_gmt":"2026-02-26T09:33:53","guid":{"rendered":"https:\/\/murreeroad.org\/?p=5192"},"modified":"2026-02-26T09:33:53","modified_gmt":"2026-02-26T09:33:53","slug":"100-operating-systems-mcqs-with-answers","status":"publish","type":"post","link":"https:\/\/learn-nest.murreeroad.org\/blog\/100-operating-systems-mcqs-with-answers\/","title":{"rendered":"100 Operating Systems MCQs with Answers"},"content":{"rendered":"<p>100 Operating Systems MCQs with Answers (Multiple Choice Questions for Exams &amp; Competitive Tests). Prepare for exams with these 100 Operating Systems MCQs with answers. This comprehensive set of multiple-choice questions covers process management, memory management, scheduling, deadlock, file systems, real-time OS, Linux, and more perfect for computer science students, IT exams, and competitive tests.<\/p>\n<p>Operating Systems (OS) are one of the most important subjects in computer science and information technology. Whether you are preparing for university exams, competitive tests, job interviews, or IT certifications, having a strong understanding of operating system concepts is essential. This collection of <strong data-start=\"349\" data-end=\"392\">100 Operating Systems <a href=\"https:\/\/murreeroad.org\/category\/mcqs\/\">MCQs<\/a> with answers<\/strong> covers key topics such as process management, memory management, CPU scheduling, deadlocks, file systems, virtual memory, real-time operating systems, Linux basics, and more. These multiple-choice questions are carefully designed to help students revise core concepts, improve problem-solving skills, and confidently prepare for computer science exams and competitive IT tests.<\/p>\n<h1 data-start=\"155\" data-end=\"200\">\u2705 Operating Systems \u2013 100 MCQs with Answers<\/h1>\n<hr data-start=\"202\" data-end=\"205\" \/>\n<h3 data-start=\"207\" data-end=\"242\">1. What is an Operating System?<\/h3>\n<p data-start=\"243\" data-end=\"343\">A) Application software<br data-start=\"266\" data-end=\"269\" \/>B) System software<br data-start=\"287\" data-end=\"290\" \/>C) Programming language<br data-start=\"313\" data-end=\"316\" \/>D) Compiler<br data-start=\"327\" data-end=\"330\" \/><strong data-start=\"330\" data-end=\"343\">Answer: B<\/strong><\/p>\n<hr data-start=\"345\" data-end=\"348\" \/>\n<h3 data-start=\"350\" data-end=\"407\">2. Which of the following is not an Operating System?<\/h3>\n<p data-start=\"408\" data-end=\"468\">A) Windows<br data-start=\"418\" data-end=\"421\" \/>B) Linux<br data-start=\"429\" data-end=\"432\" \/>C) Oracle<br data-start=\"441\" data-end=\"444\" \/>D) macOS<br data-start=\"452\" data-end=\"455\" \/><strong data-start=\"455\" data-end=\"468\">Answer: C<\/strong><\/p>\n<hr data-start=\"470\" data-end=\"473\" \/>\n<h3 data-start=\"475\" data-end=\"524\">3. The core of an operating system is called:<\/h3>\n<p data-start=\"525\" data-end=\"589\">A) Shell<br data-start=\"533\" data-end=\"536\" \/>B) Kernel<br data-start=\"545\" data-end=\"548\" \/>C) Command<br data-start=\"558\" data-end=\"561\" \/>D) Interface<br data-start=\"573\" data-end=\"576\" \/><strong data-start=\"576\" data-end=\"589\">Answer: B<\/strong><\/p>\n<hr data-start=\"591\" data-end=\"594\" \/>\n<h3 data-start=\"596\" data-end=\"627\">4. Which OS is open-source?<\/h3>\n<p data-start=\"628\" data-end=\"685\">A) Windows<br data-start=\"638\" data-end=\"641\" \/>B) macOS<br data-start=\"649\" data-end=\"652\" \/>C) Linux<br data-start=\"660\" data-end=\"663\" \/>D) DOS<br data-start=\"669\" data-end=\"672\" \/><strong data-start=\"672\" data-end=\"685\">Answer: C<\/strong><\/p>\n<hr data-start=\"687\" data-end=\"690\" \/>\n<h3 data-start=\"692\" data-end=\"730\">5. Which component manages memory?<\/h3>\n<p data-start=\"731\" data-end=\"816\">A) File system<br data-start=\"745\" data-end=\"748\" \/>B) Process manager<br data-start=\"766\" data-end=\"769\" \/>C) Memory manager<br data-start=\"786\" data-end=\"789\" \/>D) Compiler<br data-start=\"800\" data-end=\"803\" \/><strong data-start=\"803\" data-end=\"816\">Answer: C<\/strong><\/p>\n<hr data-start=\"818\" data-end=\"821\" \/>\n<h3 data-start=\"823\" data-end=\"843\">6. A process is:<\/h3>\n<p data-start=\"844\" data-end=\"925\">A) A program in execution<br data-start=\"869\" data-end=\"872\" \/>B) A file<br data-start=\"881\" data-end=\"884\" \/>C) A folder<br data-start=\"895\" data-end=\"898\" \/>D) A device<br data-start=\"909\" data-end=\"912\" \/><strong data-start=\"912\" data-end=\"925\">Answer: A<\/strong><\/p>\n<hr data-start=\"927\" data-end=\"930\" \/>\n<h3 data-start=\"932\" data-end=\"983\">7. Which scheduling algorithm uses time slices?<\/h3>\n<p data-start=\"984\" data-end=\"1047\">A) FCFS<br data-start=\"991\" data-end=\"994\" \/>B) Round Robin<br data-start=\"1008\" data-end=\"1011\" \/>C) SJF<br data-start=\"1017\" data-end=\"1020\" \/>D) Priority<br data-start=\"1031\" data-end=\"1034\" \/><strong data-start=\"1034\" data-end=\"1047\">Answer: B<\/strong><\/p>\n<hr data-start=\"1049\" data-end=\"1052\" \/>\n<h3 data-start=\"1054\" data-end=\"1077\">8. FCFS stands for:<\/h3>\n<p data-start=\"1078\" data-end=\"1211\">A) First Come First Serve<br data-start=\"1103\" data-end=\"1106\" \/>B) First Control First System<br data-start=\"1135\" data-end=\"1138\" \/>C) Fastest Come Fast Serve<br data-start=\"1164\" data-end=\"1167\" \/>D) File Control First System<br data-start=\"1195\" data-end=\"1198\" \/><strong data-start=\"1198\" data-end=\"1211\">Answer: A<\/strong><\/p>\n<hr data-start=\"1213\" data-end=\"1216\" \/>\n<h3 data-start=\"1218\" data-end=\"1272\">9. Which is a non-preemptive scheduling algorithm?<\/h3>\n<p data-start=\"1273\" data-end=\"1362\">A) Round Robin<br data-start=\"1287\" data-end=\"1290\" \/>B) Priority (Preemptive)<br data-start=\"1314\" data-end=\"1317\" \/>C) FCFS<br data-start=\"1324\" data-end=\"1327\" \/>D) Multilevel Queue<br data-start=\"1346\" data-end=\"1349\" \/><strong data-start=\"1349\" data-end=\"1362\">Answer: C<\/strong><\/p>\n<hr data-start=\"1364\" data-end=\"1367\" \/>\n<h3 data-start=\"1369\" data-end=\"1397\">10. Virtual memory uses:<\/h3>\n<p data-start=\"1398\" data-end=\"1465\">A) RAM only<br data-start=\"1409\" data-end=\"1412\" \/>B) Hard disk<br data-start=\"1424\" data-end=\"1427\" \/>C) Cache<br data-start=\"1435\" data-end=\"1438\" \/>D) Register<br data-start=\"1449\" data-end=\"1452\" \/><strong data-start=\"1452\" data-end=\"1465\">Answer: B<\/strong><\/p>\n<hr data-start=\"1467\" data-end=\"1470\" \/>\n<h3 data-start=\"1472\" data-end=\"1494\">11. Paging avoids:<\/h3>\n<p data-start=\"1495\" data-end=\"1594\">A) External fragmentation<br data-start=\"1520\" data-end=\"1523\" \/>B) Internal fragmentation<br data-start=\"1548\" data-end=\"1551\" \/>C) Deadlock<br data-start=\"1562\" data-end=\"1565\" \/>D) Starvation<br data-start=\"1578\" data-end=\"1581\" \/><strong data-start=\"1581\" data-end=\"1594\">Answer: A<\/strong><\/p>\n<hr data-start=\"1596\" data-end=\"1599\" \/>\n<h3 data-start=\"1601\" data-end=\"1633\">12. Thrashing occurs due to:<\/h3>\n<p data-start=\"1634\" data-end=\"1723\">A) Excessive paging<br data-start=\"1653\" data-end=\"1656\" \/>B) Overheating<br data-start=\"1670\" data-end=\"1673\" \/>C) Virus attack<br data-start=\"1688\" data-end=\"1691\" \/>D) Power failure<br data-start=\"1707\" data-end=\"1710\" \/><strong data-start=\"1710\" data-end=\"1723\">Answer: A<\/strong><\/p>\n<hr data-start=\"1725\" data-end=\"1728\" \/>\n<h3 data-start=\"1730\" data-end=\"1761\">13. A deadlock occurs when:<\/h3>\n<p data-start=\"1762\" data-end=\"1863\">A) CPU is idle<br data-start=\"1776\" data-end=\"1779\" \/>B) Processes wait indefinitely<br data-start=\"1809\" data-end=\"1812\" \/>C) Memory is full<br data-start=\"1829\" data-end=\"1832\" \/>D) Disk crashes<br data-start=\"1847\" data-end=\"1850\" \/><strong data-start=\"1850\" data-end=\"1863\">Answer: B<\/strong><\/p>\n<hr data-start=\"1865\" data-end=\"1868\" \/>\n<h3 data-start=\"1870\" data-end=\"1924\">14. How many conditions are required for deadlock?<\/h3>\n<p data-start=\"1925\" data-end=\"1966\">A) 2<br data-start=\"1929\" data-end=\"1932\" \/>B) 3<br data-start=\"1936\" data-end=\"1939\" \/>C) 4<br data-start=\"1943\" data-end=\"1946\" \/>D) 5<br data-start=\"1950\" data-end=\"1953\" \/><strong data-start=\"1953\" data-end=\"1966\">Answer: C<\/strong><\/p>\n<hr data-start=\"1968\" data-end=\"1971\" \/>\n<h3 data-start=\"1973\" data-end=\"2004\">15. Mutual exclusion means:<\/h3>\n<p data-start=\"2005\" data-end=\"2114\">A) Shared resource<br data-start=\"2023\" data-end=\"2026\" \/>B) Only one process at a time<br data-start=\"2055\" data-end=\"2058\" \/>C) All processes execute<br data-start=\"2082\" data-end=\"2085\" \/>D) No waiting<br data-start=\"2098\" data-end=\"2101\" \/><strong data-start=\"2101\" data-end=\"2114\">Answer: B<\/strong><\/p>\n<hr data-start=\"2116\" data-end=\"2119\" \/>\n<h3 data-start=\"2121\" data-end=\"2155\">16. Which is not a type of OS?<\/h3>\n<p data-start=\"2156\" data-end=\"2238\">A) Batch OS<br data-start=\"2167\" data-end=\"2170\" \/>B) Real-time OS<br data-start=\"2185\" data-end=\"2188\" \/>C) Distributed OS<br data-start=\"2205\" data-end=\"2208\" \/>D) Compiler OS<br data-start=\"2222\" data-end=\"2225\" \/><strong data-start=\"2225\" data-end=\"2238\">Answer: D<\/strong><\/p>\n<hr data-start=\"2240\" data-end=\"2243\" \/>\n<h3 data-start=\"2245\" data-end=\"2277\">17. Real-time OS is used in:<\/h3>\n<p data-start=\"2278\" data-end=\"2359\">A) Banking<br data-start=\"2288\" data-end=\"2291\" \/>B) Gaming<br data-start=\"2300\" data-end=\"2303\" \/>C) Embedded systems<br data-start=\"2322\" data-end=\"2325\" \/>D) Word processing<br data-start=\"2343\" data-end=\"2346\" \/><strong data-start=\"2346\" data-end=\"2359\">Answer: C<\/strong><\/p>\n<hr data-start=\"2361\" data-end=\"2364\" \/>\n<h3 data-start=\"2366\" data-end=\"2407\">18. Which OS supports multiple users?<\/h3>\n<p data-start=\"2408\" data-end=\"2491\">A) Single-user OS<br data-start=\"2425\" data-end=\"2428\" \/>B) Multi-user OS<br data-start=\"2444\" data-end=\"2447\" \/>C) Batch OS<br data-start=\"2458\" data-end=\"2461\" \/>D) Embedded OS<br data-start=\"2475\" data-end=\"2478\" \/><strong data-start=\"2478\" data-end=\"2491\">Answer: B<\/strong><\/p>\n<hr data-start=\"2493\" data-end=\"2496\" \/>\n<h3 data-start=\"2498\" data-end=\"2521\">19. GUI stands for:<\/h3>\n<p data-start=\"2522\" data-end=\"2649\">A) Graphical User Interface<br data-start=\"2549\" data-end=\"2552\" \/>B) General User Input<br data-start=\"2573\" data-end=\"2576\" \/>C) Graphical Unified Interface<br data-start=\"2606\" data-end=\"2609\" \/>D) Global User Interface<br data-start=\"2633\" data-end=\"2636\" \/><strong data-start=\"2636\" data-end=\"2649\">Answer: A<\/strong><\/p>\n<hr data-start=\"2651\" data-end=\"2654\" \/>\n<h3 data-start=\"2656\" data-end=\"2679\">20. CLI stands for:<\/h3>\n<p data-start=\"2680\" data-end=\"2802\">A) Command Line Interface<br data-start=\"2705\" data-end=\"2708\" \/>B) Control Line Input<br data-start=\"2729\" data-end=\"2732\" \/>C) Computer Line Interface<br data-start=\"2758\" data-end=\"2761\" \/>D) Command Link Interface<br data-start=\"2786\" data-end=\"2789\" \/><strong data-start=\"2789\" data-end=\"2802\">Answer: A<\/strong><\/p>\n<hr data-start=\"2804\" data-end=\"2807\" \/>\n<p data-start=\"2809\" data-end=\"2822\">(Continuing\u2026)<\/p>\n<hr data-start=\"2824\" data-end=\"2827\" \/>\n<h3 data-start=\"2829\" data-end=\"2858\">21. Which is a mobile OS?<\/h3>\n<p data-start=\"2859\" data-end=\"2925\">A) Windows 10<br data-start=\"2872\" data-end=\"2875\" \/>B) Android<br data-start=\"2885\" data-end=\"2888\" \/>C) Ubuntu<br data-start=\"2897\" data-end=\"2900\" \/>D) Fedora<br data-start=\"2909\" data-end=\"2912\" \/><strong data-start=\"2912\" data-end=\"2925\">Answer: B<\/strong><\/p>\n<hr data-start=\"2927\" data-end=\"2930\" \/>\n<h3 data-start=\"2932\" data-end=\"2972\">22. Which company developed Windows?<\/h3>\n<p data-start=\"2973\" data-end=\"3033\">A) Apple<br data-start=\"2981\" data-end=\"2984\" \/>B) IBM<br data-start=\"2990\" data-end=\"2993\" \/>C) Microsoft<br data-start=\"3005\" data-end=\"3008\" \/>D) Google<br data-start=\"3017\" data-end=\"3020\" \/><strong data-start=\"3020\" data-end=\"3033\">Answer: C<\/strong><\/p>\n<hr data-start=\"3035\" data-end=\"3038\" \/>\n<h3 data-start=\"3040\" data-end=\"3075\">23. Which is a macOS developer?<\/h3>\n<p data-start=\"3076\" data-end=\"3132\">A) Google<br data-start=\"3085\" data-end=\"3088\" \/>B) Apple<br data-start=\"3096\" data-end=\"3099\" \/>C) IBM<br data-start=\"3105\" data-end=\"3108\" \/>D) Intel<br data-start=\"3116\" data-end=\"3119\" \/><strong data-start=\"3119\" data-end=\"3132\">Answer: B<\/strong><\/p>\n<hr data-start=\"3134\" data-end=\"3137\" \/>\n<h3 data-start=\"3139\" data-end=\"3167\">24. File system manages:<\/h3>\n<p data-start=\"3168\" data-end=\"3242\">A) CPU<br data-start=\"3174\" data-end=\"3177\" \/>B) Files and directories<br data-start=\"3201\" data-end=\"3204\" \/>C) Memory<br data-start=\"3213\" data-end=\"3216\" \/>D) Printer<br data-start=\"3226\" data-end=\"3229\" \/><strong data-start=\"3229\" data-end=\"3242\">Answer: B<\/strong><\/p>\n<hr data-start=\"3244\" data-end=\"3247\" \/>\n<h3 data-start=\"3249\" data-end=\"3281\">25. Context switching means:<\/h3>\n<p data-start=\"3282\" data-end=\"3395\">A) Changing program<br data-start=\"3301\" data-end=\"3304\" \/>B) Saving and loading process state<br data-start=\"3339\" data-end=\"3342\" \/>C) Shutting down<br data-start=\"3358\" data-end=\"3361\" \/>D) Formatting disk<br data-start=\"3379\" data-end=\"3382\" \/><strong data-start=\"3382\" data-end=\"3395\">Answer: B<\/strong><\/p>\n<hr data-start=\"3397\" data-end=\"3400\" \/>\n<h3 data-start=\"3402\" data-end=\"3437\">26. Which is secondary storage?<\/h3>\n<p data-start=\"3438\" data-end=\"3500\">A) RAM<br data-start=\"3444\" data-end=\"3447\" \/>B) Cache<br data-start=\"3455\" data-end=\"3458\" \/>C) Hard Disk<br data-start=\"3470\" data-end=\"3473\" \/>D) Register<br data-start=\"3484\" data-end=\"3487\" \/><strong data-start=\"3487\" data-end=\"3500\">Answer: C<\/strong><\/p>\n<hr data-start=\"3502\" data-end=\"3505\" \/>\n<h3 data-start=\"3507\" data-end=\"3522\">27. RAM is:<\/h3>\n<p data-start=\"3523\" data-end=\"3592\">A) Permanent<br data-start=\"3535\" data-end=\"3538\" \/>B) Volatile<br data-start=\"3549\" data-end=\"3552\" \/>C) External<br data-start=\"3563\" data-end=\"3566\" \/>D) Optical<br data-start=\"3576\" data-end=\"3579\" \/><strong data-start=\"3579\" data-end=\"3592\">Answer: B<\/strong><\/p>\n<hr data-start=\"3594\" data-end=\"3597\" \/>\n<h3 data-start=\"3599\" data-end=\"3659\">28. Which scheduling gives minimum average waiting time?<\/h3>\n<p data-start=\"3660\" data-end=\"3719\">A) FCFS<br data-start=\"3667\" data-end=\"3670\" \/>B) SJF<br data-start=\"3676\" data-end=\"3679\" \/>C) Round Robin<br data-start=\"3693\" data-end=\"3696\" \/>D) FIFO<br data-start=\"3703\" data-end=\"3706\" \/><strong data-start=\"3706\" data-end=\"3719\">Answer: B<\/strong><\/p>\n<hr data-start=\"3721\" data-end=\"3724\" \/>\n<h3 data-start=\"3726\" data-end=\"3755\">29. Starvation occurs in:<\/h3>\n<p data-start=\"3756\" data-end=\"3831\">A) FCFS<br data-start=\"3763\" data-end=\"3766\" \/>B) Priority Scheduling<br data-start=\"3788\" data-end=\"3791\" \/>C) Round Robin<br data-start=\"3805\" data-end=\"3808\" \/>D) FIFO<br data-start=\"3815\" data-end=\"3818\" \/><strong data-start=\"3818\" data-end=\"3831\">Answer: B<\/strong><\/p>\n<hr data-start=\"3833\" data-end=\"3836\" \/>\n<h3 data-start=\"3838\" data-end=\"3861\">30. Aging prevents:<\/h3>\n<p data-start=\"3862\" data-end=\"3932\">A) Deadlock<br data-start=\"3873\" data-end=\"3876\" \/>B) Starvation<br data-start=\"3889\" data-end=\"3892\" \/>C) Thrashing<br data-start=\"3904\" data-end=\"3907\" \/>D) Paging<br data-start=\"3916\" data-end=\"3919\" \/><strong data-start=\"3919\" data-end=\"3932\">Answer: B<\/strong><\/p>\n<hr data-start=\"3934\" data-end=\"3937\" \/>\n<h3 data-start=\"3959\" data-end=\"3990\">31. Multiprogramming means:<\/h3>\n<p data-start=\"3991\" data-end=\"4082\">A) One program<br data-start=\"4005\" data-end=\"4008\" \/>B) Many programs in memory<br data-start=\"4034\" data-end=\"4037\" \/>C) No memory<br data-start=\"4049\" data-end=\"4052\" \/>D) Single user<br data-start=\"4066\" data-end=\"4069\" \/><strong data-start=\"4069\" data-end=\"4082\">Answer: B<\/strong><\/p>\n<hr data-start=\"4084\" data-end=\"4087\" \/>\n<h3 data-start=\"4089\" data-end=\"4117\">32. Multitasking allows:<\/h3>\n<p data-start=\"4118\" data-end=\"4193\">A) One task<br data-start=\"4129\" data-end=\"4132\" \/>B) Two CPUs<br data-start=\"4143\" data-end=\"4146\" \/>C) Multiple tasks<br data-start=\"4163\" data-end=\"4166\" \/>D) No tasks<br data-start=\"4177\" data-end=\"4180\" \/><strong data-start=\"4180\" data-end=\"4193\">Answer: C<\/strong><\/p>\n<hr data-start=\"4195\" data-end=\"4198\" \/>\n<h3 data-start=\"4200\" data-end=\"4231\">33. Spooling is related to:<\/h3>\n<p data-start=\"4232\" data-end=\"4290\">A) CPU<br data-start=\"4238\" data-end=\"4241\" \/>B) Printer<br data-start=\"4251\" data-end=\"4254\" \/>C) Memory<br data-start=\"4263\" data-end=\"4266\" \/>D) Cache<br data-start=\"4274\" data-end=\"4277\" \/><strong data-start=\"4277\" data-end=\"4290\">Answer: B<\/strong><\/p>\n<hr data-start=\"4292\" data-end=\"4295\" \/>\n<h3 data-start=\"4297\" data-end=\"4327\">34. Semaphore is used for:<\/h3>\n<p data-start=\"4328\" data-end=\"4401\">A) Memory<br data-start=\"4337\" data-end=\"4340\" \/>B) Synchronization<br data-start=\"4358\" data-end=\"4361\" \/>C) File system<br data-start=\"4375\" data-end=\"4378\" \/>D) Disk<br data-start=\"4385\" data-end=\"4388\" \/><strong data-start=\"4388\" data-end=\"4401\">Answer: B<\/strong><\/p>\n<hr data-start=\"4403\" data-end=\"4406\" \/>\n<h3 data-start=\"4408\" data-end=\"4452\">35. Critical section problem relates to:<\/h3>\n<p data-start=\"4453\" data-end=\"4539\">A) CPU speed<br data-start=\"4465\" data-end=\"4468\" \/>B) Process synchronization<br data-start=\"4494\" data-end=\"4497\" \/>C) Disk size<br data-start=\"4509\" data-end=\"4512\" \/>D) Compiler<br data-start=\"4523\" data-end=\"4526\" \/><strong data-start=\"4526\" data-end=\"4539\">Answer: B<\/strong><\/p>\n<hr data-start=\"4541\" data-end=\"4544\" \/>\n<h3 data-start=\"4546\" data-end=\"4589\">36. Which is not a scheduling criteria?<\/h3>\n<p data-start=\"4590\" data-end=\"4678\">A) Throughput<br data-start=\"4603\" data-end=\"4606\" \/>B) Turnaround time<br data-start=\"4624\" data-end=\"4627\" \/>C) Waiting time<br data-start=\"4642\" data-end=\"4645\" \/>D) Hard disk size<br data-start=\"4662\" data-end=\"4665\" \/><strong data-start=\"4665\" data-end=\"4678\">Answer: D<\/strong><\/p>\n<hr data-start=\"4680\" data-end=\"4683\" \/>\n<h3 data-start=\"4685\" data-end=\"4712\">37. Turnaround time is:<\/h3>\n<p data-start=\"4713\" data-end=\"4819\">A) Completion &#8211; Arrival<br data-start=\"4736\" data-end=\"4739\" \/>B) Arrival &#8211; Completion<br data-start=\"4762\" data-end=\"4765\" \/>C) CPU &#8211; Memory<br data-start=\"4780\" data-end=\"4783\" \/>D) Waiting + Arrival<br data-start=\"4803\" data-end=\"4806\" \/><strong data-start=\"4806\" data-end=\"4819\">Answer: A<\/strong><\/p>\n<hr data-start=\"4821\" data-end=\"4824\" \/>\n<h3 data-start=\"4826\" data-end=\"4856\">38. Which device is input?<\/h3>\n<p data-start=\"4857\" data-end=\"4923\">A) Printer<br data-start=\"4867\" data-end=\"4870\" \/>B) Monitor<br data-start=\"4880\" data-end=\"4883\" \/>C) Keyboard<br data-start=\"4894\" data-end=\"4897\" \/>D) Speaker<br data-start=\"4907\" data-end=\"4910\" \/><strong data-start=\"4910\" data-end=\"4923\">Answer: C<\/strong><\/p>\n<hr data-start=\"4925\" data-end=\"4928\" \/>\n<h3 data-start=\"4930\" data-end=\"4967\">39. Which OS is best for servers?<\/h3>\n<p data-start=\"4968\" data-end=\"5030\">A) Linux<br data-start=\"4976\" data-end=\"4979\" \/>B) DOS<br data-start=\"4985\" data-end=\"4988\" \/>C) Windows 98<br data-start=\"5001\" data-end=\"5004\" \/>D) Android<br data-start=\"5014\" data-end=\"5017\" \/><strong data-start=\"5017\" data-end=\"5030\">Answer: A<\/strong><\/p>\n<hr data-start=\"5032\" data-end=\"5035\" \/>\n<h3 data-start=\"5037\" data-end=\"5058\">40. Interrupt is:<\/h3>\n<p data-start=\"5059\" data-end=\"5125\">A) Error<br data-start=\"5067\" data-end=\"5070\" \/>B) Signal to CPU<br data-start=\"5086\" data-end=\"5089\" \/>C) File<br data-start=\"5096\" data-end=\"5099\" \/>D) Program<br data-start=\"5109\" data-end=\"5112\" \/><strong data-start=\"5112\" data-end=\"5125\">Answer: B<\/strong><\/p>\n<hr data-start=\"5127\" data-end=\"5130\" \/>\n<h3 data-start=\"5159\" data-end=\"5193\">41. Which memory is fastest?<\/h3>\n<p data-start=\"5194\" data-end=\"5251\">A) RAM<br data-start=\"5200\" data-end=\"5203\" \/>B) Cache<br data-start=\"5211\" data-end=\"5214\" \/>C) Hard Disk<br data-start=\"5226\" data-end=\"5229\" \/>D) ROM<br data-start=\"5235\" data-end=\"5238\" \/><strong data-start=\"5238\" data-end=\"5251\">Answer: B<\/strong><\/p>\n<hr data-start=\"5253\" data-end=\"5256\" \/>\n<h3 data-start=\"5258\" data-end=\"5302\">42. Which OS uses kernel architecture?<\/h3>\n<p data-start=\"5303\" data-end=\"5369\">A) Linux<br data-start=\"5311\" data-end=\"5314\" \/>B) Windows<br data-start=\"5324\" data-end=\"5327\" \/>C) macOS<br data-start=\"5335\" data-end=\"5338\" \/>D) All of these<br data-start=\"5353\" data-end=\"5356\" \/><strong data-start=\"5356\" data-end=\"5369\">Answer: D<\/strong><\/p>\n<hr data-start=\"5371\" data-end=\"5374\" \/>\n<h3 data-start=\"5376\" data-end=\"5400\">43. Booting means:<\/h3>\n<p data-start=\"5401\" data-end=\"5497\">A) Installing OS<br data-start=\"5417\" data-end=\"5420\" \/>B) Starting computer<br data-start=\"5440\" data-end=\"5443\" \/>C) Deleting files<br data-start=\"5460\" data-end=\"5463\" \/>D) Formatting disk<br data-start=\"5481\" data-end=\"5484\" \/><strong data-start=\"5484\" data-end=\"5497\">Answer: B<\/strong><\/p>\n<hr data-start=\"5499\" data-end=\"5502\" \/>\n<h3 data-start=\"5504\" data-end=\"5530\">44. Cold boot means:<\/h3>\n<p data-start=\"5531\" data-end=\"5617\">A) Restart<br data-start=\"5541\" data-end=\"5544\" \/>B) Power on from off state<br data-start=\"5570\" data-end=\"5573\" \/>C) Sleep mode<br data-start=\"5586\" data-end=\"5589\" \/>D) Hibernate<br data-start=\"5601\" data-end=\"5604\" \/><strong data-start=\"5604\" data-end=\"5617\">Answer: B<\/strong><\/p>\n<hr data-start=\"5619\" data-end=\"5622\" \/>\n<h3 data-start=\"5624\" data-end=\"5650\">45. Warm boot means:<\/h3>\n<p data-start=\"5651\" data-end=\"5717\">A) Restart<br data-start=\"5661\" data-end=\"5664\" \/>B) Shutdown<br data-start=\"5675\" data-end=\"5678\" \/>C) Hibernate<br data-start=\"5690\" data-end=\"5693\" \/>D) Sleep<br data-start=\"5701\" data-end=\"5704\" \/><strong data-start=\"5704\" data-end=\"5717\">Answer: A<\/strong><\/p>\n<hr data-start=\"5719\" data-end=\"5722\" \/>\n<h3 data-start=\"5724\" data-end=\"5752\">46. Which manages CPU?<\/h3>\n<p data-start=\"5753\" data-end=\"5819\">A) Scheduler<br data-start=\"5765\" data-end=\"5768\" \/>B) Compiler<br data-start=\"5779\" data-end=\"5782\" \/>C) Loader<br data-start=\"5791\" data-end=\"5794\" \/>D) Linker<br data-start=\"5803\" data-end=\"5806\" \/><strong data-start=\"5806\" data-end=\"5819\">Answer: A<\/strong><\/p>\n<hr data-start=\"5821\" data-end=\"5824\" \/>\n<h3 data-start=\"5826\" data-end=\"5862\">47. Loader loads program into:<\/h3>\n<p data-start=\"5863\" data-end=\"5914\">A) CPU<br data-start=\"5869\" data-end=\"5872\" \/>B) RAM<br data-start=\"5878\" data-end=\"5881\" \/>C) ROM<br data-start=\"5887\" data-end=\"5890\" \/>D) Cache<br data-start=\"5898\" data-end=\"5901\" \/><strong data-start=\"5901\" data-end=\"5914\">Answer: B<\/strong><\/p>\n<hr data-start=\"5916\" data-end=\"5919\" \/>\n<h3 data-start=\"5921\" data-end=\"5964\">48. Which is example of real-time OS?<\/h3>\n<p data-start=\"5965\" data-end=\"6029\">A) Windows<br data-start=\"5975\" data-end=\"5978\" \/>B) VxWorks<br data-start=\"5988\" data-end=\"5991\" \/>C) Linux Mint<br data-start=\"6004\" data-end=\"6007\" \/>D) DOS<br data-start=\"6013\" data-end=\"6016\" \/><strong data-start=\"6016\" data-end=\"6029\">Answer: B<\/strong><\/p>\n<hr data-start=\"6031\" data-end=\"6034\" \/>\n<h3 data-start=\"6036\" data-end=\"6069\">49. Distributed OS manages:<\/h3>\n<p data-start=\"6070\" data-end=\"6156\">A) Single computer<br data-start=\"6088\" data-end=\"6091\" \/>B) Multiple computers<br data-start=\"6112\" data-end=\"6115\" \/>C) Printer<br data-start=\"6125\" data-end=\"6128\" \/>D) Disk only<br data-start=\"6140\" data-end=\"6143\" \/><strong data-start=\"6143\" data-end=\"6156\">Answer: B<\/strong><\/p>\n<hr data-start=\"6158\" data-end=\"6161\" \/>\n<h3 data-start=\"6163\" data-end=\"6208\">50. The smallest unit of data in OS is:<\/h3>\n<p data-start=\"6209\" data-end=\"6257\">A) Bit<br data-start=\"6215\" data-end=\"6218\" \/>B) Byte<br data-start=\"6225\" data-end=\"6228\" \/>C) KB<br data-start=\"6233\" data-end=\"6236\" \/>D) MB<br data-start=\"6241\" data-end=\"6244\" \/><strong data-start=\"6244\" data-end=\"6257\">Answer: A<\/strong><\/p>\n<hr data-start=\"6259\" data-end=\"6262\" \/>\n<p><a href=\"https:\/\/murreeroad.org\/100-javascript-basics-mcqs-with-answers\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-5170\" src=\"https:\/\/murreeroad.org\/wp-content\/uploads\/2026\/02\/100-JavaScript-Basics-MCQs-with-Answers-1024x683.png\" alt=\"100 JavaScript Basics MCQs with Answers\" width=\"640\" height=\"427\" srcset=\"https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-JavaScript-Basics-MCQs-with-Answers-1024x683.png 1024w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-JavaScript-Basics-MCQs-with-Answers-300x200.png 300w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-JavaScript-Basics-MCQs-with-Answers-768x512.png 768w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-JavaScript-Basics-MCQs-with-Answers.png 1536w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<hr data-start=\"6259\" data-end=\"6262\" \/>\n<h3 data-start=\"214\" data-end=\"267\">51. Which component handles input\/output devices?<\/h3>\n<p data-start=\"268\" data-end=\"341\">A) Scheduler<br data-start=\"280\" data-end=\"283\" \/>B) Device Driver<br data-start=\"299\" data-end=\"302\" \/>C) Compiler<br data-start=\"313\" data-end=\"316\" \/>D) Loader<br data-start=\"325\" data-end=\"328\" \/><strong data-start=\"328\" data-end=\"341\">Answer: B<\/strong><\/p>\n<hr data-start=\"343\" data-end=\"346\" \/>\n<h3 data-start=\"348\" data-end=\"410\">52. Which is an example of a single-user operating system?<\/h3>\n<p data-start=\"411\" data-end=\"477\">A) Windows Server<br data-start=\"428\" data-end=\"431\" \/>B) UNIX<br data-start=\"438\" data-end=\"441\" \/>C) MS-DOS<br data-start=\"450\" data-end=\"453\" \/>D) Linux<br data-start=\"461\" data-end=\"464\" \/><strong data-start=\"464\" data-end=\"477\">Answer: C<\/strong><\/p>\n<hr data-start=\"479\" data-end=\"482\" \/>\n<h3 data-start=\"484\" data-end=\"521\">53. A time-sharing system allows:<\/h3>\n<p data-start=\"522\" data-end=\"646\">A) One user at a time<br data-start=\"543\" data-end=\"546\" \/>B) Multiple users simultaneously<br data-start=\"578\" data-end=\"581\" \/>C) No user interaction<br data-start=\"603\" data-end=\"606\" \/>D) Only batch processing<br data-start=\"630\" data-end=\"633\" \/><strong data-start=\"633\" data-end=\"646\">Answer: B<\/strong><\/p>\n<hr data-start=\"648\" data-end=\"651\" \/>\n<h3 data-start=\"653\" data-end=\"694\">54. Internal fragmentation occurs in:<\/h3>\n<p data-start=\"695\" data-end=\"782\">A) Paging<br data-start=\"704\" data-end=\"707\" \/>B) Fixed partitioning<br data-start=\"728\" data-end=\"731\" \/>C) Segmentation<br data-start=\"746\" data-end=\"749\" \/>D) Virtual memory<br data-start=\"766\" data-end=\"769\" \/><strong data-start=\"769\" data-end=\"782\">Answer: B<\/strong><\/p>\n<hr data-start=\"784\" data-end=\"787\" \/>\n<h3 data-start=\"789\" data-end=\"830\">55. External fragmentation occurs in:<\/h3>\n<p data-start=\"831\" data-end=\"924\">A) Fixed partitioning<br data-start=\"852\" data-end=\"855\" \/>B) Paging<br data-start=\"864\" data-end=\"867\" \/>C) Dynamic partitioning<br data-start=\"890\" data-end=\"893\" \/>D) Cache memory<br data-start=\"908\" data-end=\"911\" \/><strong data-start=\"911\" data-end=\"924\">Answer: C<\/strong><\/p>\n<hr data-start=\"926\" data-end=\"929\" \/>\n<h3 data-start=\"931\" data-end=\"968\">56. Deadlock prevention works by:<\/h3>\n<p data-start=\"969\" data-end=\"1099\">A) Ignoring deadlock<br data-start=\"989\" data-end=\"992\" \/>B) Detecting deadlock<br data-start=\"1013\" data-end=\"1016\" \/>C) Avoiding at least one necessary condition<br data-start=\"1060\" data-end=\"1063\" \/>D) Restarting system<br data-start=\"1083\" data-end=\"1086\" \/><strong data-start=\"1086\" data-end=\"1099\">Answer: C<\/strong><\/p>\n<hr data-start=\"1101\" data-end=\"1104\" \/>\n<h3 data-start=\"1106\" data-end=\"1149\">57. The Banker\u2019s Algorithm is used for:<\/h3>\n<p data-start=\"1150\" data-end=\"1247\">A) Scheduling<br data-start=\"1163\" data-end=\"1166\" \/>B) Memory allocation<br data-start=\"1186\" data-end=\"1189\" \/>C) Deadlock avoidance<br data-start=\"1210\" data-end=\"1213\" \/>D) File management<br data-start=\"1231\" data-end=\"1234\" \/><strong data-start=\"1234\" data-end=\"1247\">Answer: C<\/strong><\/p>\n<hr data-start=\"1249\" data-end=\"1252\" \/>\n<h3 data-start=\"1254\" data-end=\"1287\">58. A page fault occurs when:<\/h3>\n<p data-start=\"1288\" data-end=\"1392\">A) CPU is overloaded<br data-start=\"1308\" data-end=\"1311\" \/>B) Page is not found in memory<br data-start=\"1341\" data-end=\"1344\" \/>C) Disk fails<br data-start=\"1357\" data-end=\"1360\" \/>D) Cache is full<br data-start=\"1376\" data-end=\"1379\" \/><strong data-start=\"1379\" data-end=\"1392\">Answer: B<\/strong><\/p>\n<hr data-start=\"1394\" data-end=\"1397\" \/>\n<h3 data-start=\"1399\" data-end=\"1437\">59. Swapping moves a process from:<\/h3>\n<p data-start=\"1438\" data-end=\"1519\">A) CPU to RAM<br data-start=\"1451\" data-end=\"1454\" \/>B) RAM to Disk<br data-start=\"1468\" data-end=\"1471\" \/>C) Disk to CPU<br data-start=\"1485\" data-end=\"1488\" \/>D) Cache to RAM<br data-start=\"1503\" data-end=\"1506\" \/><strong data-start=\"1506\" data-end=\"1519\">Answer: B<\/strong><\/p>\n<hr data-start=\"1521\" data-end=\"1524\" \/>\n<h3 data-start=\"1526\" data-end=\"1581\">60. Which of the following is NOT a type of memory?<\/h3>\n<p data-start=\"1582\" data-end=\"1638\">A) RAM<br data-start=\"1588\" data-end=\"1591\" \/>B) ROM<br data-start=\"1597\" data-end=\"1600\" \/>C) Cache<br data-start=\"1608\" data-end=\"1611\" \/>D) Compiler<br data-start=\"1622\" data-end=\"1625\" \/><strong data-start=\"1625\" data-end=\"1638\">Answer: D<\/strong><\/p>\n<hr data-start=\"1640\" data-end=\"1643\" \/>\n<h3 data-start=\"1645\" data-end=\"1682\">61. Kernel mode is also known as:<\/h3>\n<p data-start=\"1683\" data-end=\"1764\">A) User mode<br data-start=\"1695\" data-end=\"1698\" \/>B) Safe mode<br data-start=\"1710\" data-end=\"1713\" \/>C) Privileged mode<br data-start=\"1731\" data-end=\"1734\" \/>D) Normal mode<br data-start=\"1748\" data-end=\"1751\" \/><strong data-start=\"1751\" data-end=\"1764\">Answer: C<\/strong><\/p>\n<hr data-start=\"1766\" data-end=\"1769\" \/>\n<h3 data-start=\"1771\" data-end=\"1792\">62. User mode is:<\/h3>\n<p data-start=\"1793\" data-end=\"1887\">A) Restricted mode<br data-start=\"1811\" data-end=\"1814\" \/>B) Full access mode<br data-start=\"1833\" data-end=\"1836\" \/>C) Kernel mode<br data-start=\"1850\" data-end=\"1853\" \/>D) Supervisor mode<br data-start=\"1871\" data-end=\"1874\" \/><strong data-start=\"1874\" data-end=\"1887\">Answer: A<\/strong><\/p>\n<hr data-start=\"1889\" data-end=\"1892\" \/>\n<h3 data-start=\"1894\" data-end=\"1944\">63. The shell in an operating system provides:<\/h3>\n<p data-start=\"1945\" data-end=\"2060\">A) Memory management<br data-start=\"1965\" data-end=\"1968\" \/>B) Hardware control<br data-start=\"1987\" data-end=\"1990\" \/>C) Interface between user and kernel<br data-start=\"2026\" data-end=\"2029\" \/>D) File storage<br data-start=\"2044\" data-end=\"2047\" \/><strong data-start=\"2047\" data-end=\"2060\">Answer: C<\/strong><\/p>\n<hr data-start=\"2062\" data-end=\"2065\" \/>\n<h3 data-start=\"2067\" data-end=\"2126\">64. Which of the following is NOT a Linux distribution?<\/h3>\n<p data-start=\"2127\" data-end=\"2191\">A) Ubuntu<br data-start=\"2136\" data-end=\"2139\" \/>B) Fedora<br data-start=\"2148\" data-end=\"2151\" \/>C) Photoshop<br data-start=\"2163\" data-end=\"2166\" \/>D) Debian<br data-start=\"2175\" data-end=\"2178\" \/><strong data-start=\"2178\" data-end=\"2191\">Answer: C<\/strong><\/p>\n<hr data-start=\"2193\" data-end=\"2196\" \/>\n<h3 data-start=\"2198\" data-end=\"2225\">65. Ubuntu is based on:<\/h3>\n<p data-start=\"2226\" data-end=\"2282\">A) Windows<br data-start=\"2236\" data-end=\"2239\" \/>B) UNIX<br data-start=\"2246\" data-end=\"2249\" \/>C) Linux<br data-start=\"2257\" data-end=\"2260\" \/>D) DOS<br data-start=\"2266\" data-end=\"2269\" \/><strong data-start=\"2269\" data-end=\"2282\">Answer: C<\/strong><\/p>\n<hr data-start=\"2284\" data-end=\"2287\" \/>\n<h3 data-start=\"2289\" data-end=\"2334\">66. Android operating system is based on:<\/h3>\n<p data-start=\"2335\" data-end=\"2405\">A) Windows kernel<br data-start=\"2352\" data-end=\"2355\" \/>B) UNIX<br data-start=\"2362\" data-end=\"2365\" \/>C) Linux kernel<br data-start=\"2380\" data-end=\"2383\" \/>D) DOS<br data-start=\"2389\" data-end=\"2392\" \/><strong data-start=\"2392\" data-end=\"2405\">Answer: C<\/strong><\/p>\n<hr data-start=\"2407\" data-end=\"2410\" \/>\n<h3 data-start=\"2412\" data-end=\"2440\">67. iOS is developed by:<\/h3>\n<p data-start=\"2441\" data-end=\"2501\">A) Microsoft<br data-start=\"2453\" data-end=\"2456\" \/>B) Google<br data-start=\"2465\" data-end=\"2468\" \/>C) Apple<br data-start=\"2476\" data-end=\"2479\" \/>D) IBM<br data-start=\"2485\" data-end=\"2488\" \/><strong data-start=\"2488\" data-end=\"2501\">Answer: C<\/strong><\/p>\n<hr data-start=\"2503\" data-end=\"2506\" \/>\n<h3 data-start=\"2508\" data-end=\"2573\">68. Which of the following is NOT a CPU scheduling algorithm?<\/h3>\n<p data-start=\"2574\" data-end=\"2636\">A) FCFS<br data-start=\"2581\" data-end=\"2584\" \/>B) Round Robin<br data-start=\"2598\" data-end=\"2601\" \/>C) SJF<br data-start=\"2607\" data-end=\"2610\" \/>D) Linking<br data-start=\"2620\" data-end=\"2623\" \/><strong data-start=\"2623\" data-end=\"2636\">Answer: D<\/strong><\/p>\n<hr data-start=\"2638\" data-end=\"2641\" \/>\n<h3 data-start=\"2643\" data-end=\"2682\">69. FIFO scheduling is the same as:<\/h3>\n<p data-start=\"2683\" data-end=\"2746\">A) SJF<br data-start=\"2689\" data-end=\"2692\" \/>B) Round Robin<br data-start=\"2706\" data-end=\"2709\" \/>C) FCFS<br data-start=\"2716\" data-end=\"2719\" \/>D) Priority<br data-start=\"2730\" data-end=\"2733\" \/><strong data-start=\"2733\" data-end=\"2746\">Answer: C<\/strong><\/p>\n<hr data-start=\"2748\" data-end=\"2751\" \/>\n<h3 data-start=\"2753\" data-end=\"2807\">70. Which technique is used to prevent starvation?<\/h3>\n<p data-start=\"2808\" data-end=\"2886\">A) Deadlock detection<br data-start=\"2829\" data-end=\"2832\" \/>B) Aging<br data-start=\"2840\" data-end=\"2843\" \/>C) Paging<br data-start=\"2852\" data-end=\"2855\" \/>D) Segmentation<br data-start=\"2870\" data-end=\"2873\" \/><strong data-start=\"2873\" data-end=\"2886\">Answer: B<\/strong><\/p>\n<hr data-start=\"2888\" data-end=\"2891\" \/>\n<h3 data-start=\"2893\" data-end=\"2922\">71. Multithreading means:<\/h3>\n<p data-start=\"2923\" data-end=\"3037\">A) Multiple CPUs<br data-start=\"2939\" data-end=\"2942\" \/>B) Multiple programs<br data-start=\"2962\" data-end=\"2965\" \/>C) Multiple threads within a process<br data-start=\"3001\" data-end=\"3004\" \/>D) Multiple users<br data-start=\"3021\" data-end=\"3024\" \/><strong data-start=\"3024\" data-end=\"3037\">Answer: C<\/strong><\/p>\n<hr data-start=\"3039\" data-end=\"3042\" \/>\n<h3 data-start=\"3044\" data-end=\"3076\">72. A thread is also called:<\/h3>\n<p data-start=\"3077\" data-end=\"3178\">A) Heavyweight process<br data-start=\"3099\" data-end=\"3102\" \/>B) Lightweight process<br data-start=\"3124\" data-end=\"3127\" \/>C) System call<br data-start=\"3141\" data-end=\"3144\" \/>D) Program counter<br data-start=\"3162\" data-end=\"3165\" \/><strong data-start=\"3165\" data-end=\"3178\">Answer: B<\/strong><\/p>\n<hr data-start=\"3180\" data-end=\"3183\" \/>\n<h3 data-start=\"3185\" data-end=\"3222\">73. A race condition occurs when:<\/h3>\n<p data-start=\"3223\" data-end=\"3332\">A) CPU runs fast<br data-start=\"3239\" data-end=\"3242\" \/>B) Processes compete for shared data<br data-start=\"3278\" data-end=\"3281\" \/>C) Memory is full<br data-start=\"3298\" data-end=\"3301\" \/>D) Disk crashes<br data-start=\"3316\" data-end=\"3319\" \/><strong data-start=\"3319\" data-end=\"3332\">Answer: B<\/strong><\/p>\n<hr data-start=\"3334\" data-end=\"3337\" \/>\n<h3 data-start=\"3339\" data-end=\"3378\">74. Protection in OS is mainly for:<\/h3>\n<p data-start=\"3379\" data-end=\"3438\">A) Speed<br data-start=\"3387\" data-end=\"3390\" \/>B) Security<br data-start=\"3401\" data-end=\"3404\" \/>C) Size<br data-start=\"3411\" data-end=\"3414\" \/>D) Power<br data-start=\"3422\" data-end=\"3425\" \/><strong data-start=\"3425\" data-end=\"3438\">Answer: B<\/strong><\/p>\n<hr data-start=\"3440\" data-end=\"3443\" \/>\n<h3 data-start=\"3445\" data-end=\"3482\">75. Encryption is used to ensure:<\/h3>\n<p data-start=\"3483\" data-end=\"3558\">A) Speed<br data-start=\"3491\" data-end=\"3494\" \/>B) Confidentiality<br data-start=\"3512\" data-end=\"3515\" \/>C) Storage<br data-start=\"3525\" data-end=\"3528\" \/>D) Compilation<br data-start=\"3542\" data-end=\"3545\" \/><strong data-start=\"3545\" data-end=\"3558\">Answer: B<\/strong><\/p>\n<hr data-start=\"3560\" data-end=\"3563\" \/>\n<h3 data-start=\"3565\" data-end=\"3614\">76. Which is an open-source operating system?<\/h3>\n<p data-start=\"3615\" data-end=\"3672\">A) Windows<br data-start=\"3625\" data-end=\"3628\" \/>B) macOS<br data-start=\"3636\" data-end=\"3639\" \/>C) Linux<br data-start=\"3647\" data-end=\"3650\" \/>D) iOS<br data-start=\"3656\" data-end=\"3659\" \/><strong data-start=\"3659\" data-end=\"3672\">Answer: C<\/strong><\/p>\n<hr data-start=\"3674\" data-end=\"3677\" \/>\n<h3 data-start=\"3679\" data-end=\"3721\">77. Which OS is commonly used in ATMs?<\/h3>\n<p data-start=\"3722\" data-end=\"3808\">A) Batch OS<br data-start=\"3733\" data-end=\"3736\" \/>B) Real-time OS<br data-start=\"3751\" data-end=\"3754\" \/>C) Time-sharing OS<br data-start=\"3772\" data-end=\"3775\" \/>D) Distributed OS<br data-start=\"3792\" data-end=\"3795\" \/><strong data-start=\"3795\" data-end=\"3808\">Answer: B<\/strong><\/p>\n<hr data-start=\"3810\" data-end=\"3813\" \/>\n<h3 data-start=\"3815\" data-end=\"3846\">78. Batch processing means:<\/h3>\n<p data-start=\"3847\" data-end=\"3973\">A) Continuous user interaction<br data-start=\"3877\" data-end=\"3880\" \/>B) Manual execution<br data-start=\"3899\" data-end=\"3902\" \/>C) No direct user interaction<br data-start=\"3931\" data-end=\"3934\" \/>D) Real-time processing<br data-start=\"3957\" data-end=\"3960\" \/><strong data-start=\"3960\" data-end=\"3973\">Answer: C<\/strong><\/p>\n<hr data-start=\"3975\" data-end=\"3978\" \/>\n<h3 data-start=\"3980\" data-end=\"4030\">79. Which Linux command is used to list files?<\/h3>\n<p data-start=\"4031\" data-end=\"4081\">A) dir<br data-start=\"4037\" data-end=\"4040\" \/>B) ls<br data-start=\"4045\" data-end=\"4048\" \/>C) list<br data-start=\"4055\" data-end=\"4058\" \/>D) show<br data-start=\"4065\" data-end=\"4068\" \/><strong data-start=\"4068\" data-end=\"4081\">Answer: B<\/strong><\/p>\n<hr data-start=\"4083\" data-end=\"4086\" \/>\n<h3 data-start=\"4088\" data-end=\"4149\">80. Which command is used to create a directory in Linux?<\/h3>\n<p data-start=\"4150\" data-end=\"4206\">A) create<br data-start=\"4159\" data-end=\"4162\" \/>B) md<br data-start=\"4167\" data-end=\"4170\" \/>C) mkdir<br data-start=\"4178\" data-end=\"4181\" \/>D) newdir<br data-start=\"4190\" data-end=\"4193\" \/><strong data-start=\"4193\" data-end=\"4206\">Answer: C<\/strong><\/p>\n<hr data-start=\"4208\" data-end=\"4211\" \/>\n<h3 data-start=\"4213\" data-end=\"4239\">81. NTFS is a type of:<\/h3>\n<p data-start=\"4240\" data-end=\"4309\">A) Processor<br data-start=\"4252\" data-end=\"4255\" \/>B) File system<br data-start=\"4269\" data-end=\"4272\" \/>C) Memory<br data-start=\"4281\" data-end=\"4284\" \/>D) Kernel<br data-start=\"4293\" data-end=\"4296\" \/><strong data-start=\"4296\" data-end=\"4309\">Answer: B<\/strong><\/p>\n<hr data-start=\"4311\" data-end=\"4314\" \/>\n<h3 data-start=\"4316\" data-end=\"4339\">82. FAT stands for:<\/h3>\n<p data-start=\"4340\" data-end=\"4454\">A) File Access Table<br data-start=\"4360\" data-end=\"4363\" \/>B) File Allocation Table<br data-start=\"4387\" data-end=\"4390\" \/>C) Fast Access Table<br data-start=\"4410\" data-end=\"4413\" \/>D) File Application Table<br data-start=\"4438\" data-end=\"4441\" \/><strong data-start=\"4441\" data-end=\"4454\">Answer: B<\/strong><\/p>\n<hr data-start=\"4456\" data-end=\"4459\" \/>\n<h3 data-start=\"4461\" data-end=\"4494\">83. Virtual memory increases:<\/h3>\n<p data-start=\"4495\" data-end=\"4586\">A) Physical memory<br data-start=\"4513\" data-end=\"4516\" \/>B) CPU speed<br data-start=\"4528\" data-end=\"4531\" \/>C) Apparent memory size<br data-start=\"4554\" data-end=\"4557\" \/>D) Cache size<br data-start=\"4570\" data-end=\"4573\" \/><strong data-start=\"4573\" data-end=\"4586\">Answer: C<\/strong><\/p>\n<hr data-start=\"4588\" data-end=\"4591\" \/>\n<h3 data-start=\"4593\" data-end=\"4626\">84. CPU utilization measures:<\/h3>\n<p data-start=\"4627\" data-end=\"4708\">A) Disk usage<br data-start=\"4640\" data-end=\"4643\" \/>B) Memory usage<br data-start=\"4658\" data-end=\"4661\" \/>C) CPU busy time<br data-start=\"4677\" data-end=\"4680\" \/>D) File size<br data-start=\"4692\" data-end=\"4695\" \/><strong data-start=\"4695\" data-end=\"4708\">Answer: C<\/strong><\/p>\n<hr data-start=\"4710\" data-end=\"4713\" \/>\n<h3 data-start=\"4715\" data-end=\"4744\">85. Throughput refers to:<\/h3>\n<p data-start=\"4745\" data-end=\"4858\">A) Memory size<br data-start=\"4759\" data-end=\"4762\" \/>B) Number of processes completed per unit time<br data-start=\"4808\" data-end=\"4811\" \/>C) CPU speed<br data-start=\"4823\" data-end=\"4826\" \/>D) Disk capacity<br data-start=\"4842\" data-end=\"4845\" \/><strong data-start=\"4845\" data-end=\"4858\">Answer: B<\/strong><\/p>\n<hr data-start=\"4860\" data-end=\"4863\" \/>\n<h3 data-start=\"4865\" data-end=\"4889\">86. Waiting time is:<\/h3>\n<p data-start=\"4890\" data-end=\"5009\">A) Time spent executing<br data-start=\"4913\" data-end=\"4916\" \/>B) Time spent in ready queue<br data-start=\"4944\" data-end=\"4947\" \/>C) Time spent in disk<br data-start=\"4968\" data-end=\"4971\" \/>D) Time spent in cache<br data-start=\"4993\" data-end=\"4996\" \/><strong data-start=\"4996\" data-end=\"5009\">Answer: B<\/strong><\/p>\n<hr data-start=\"5011\" data-end=\"5014\" \/>\n<h3 data-start=\"5016\" data-end=\"5059\">87. Response time is most important in:<\/h3>\n<p data-start=\"5060\" data-end=\"5160\">A) Batch systems<br data-start=\"5076\" data-end=\"5079\" \/>B) Interactive systems<br data-start=\"5101\" data-end=\"5104\" \/>C) Embedded systems<br data-start=\"5123\" data-end=\"5126\" \/>D) Offline systems<br data-start=\"5144\" data-end=\"5147\" \/><strong data-start=\"5147\" data-end=\"5160\">Answer: B<\/strong><\/p>\n<hr data-start=\"5162\" data-end=\"5165\" \/>\n<h3 data-start=\"5167\" data-end=\"5187\">88. Paging uses:<\/h3>\n<p data-start=\"5188\" data-end=\"5287\">A) Variable-size blocks<br data-start=\"5211\" data-end=\"5214\" \/>B) Fixed-size pages<br data-start=\"5233\" data-end=\"5236\" \/>C) Dynamic memory<br data-start=\"5253\" data-end=\"5256\" \/>D) Cache memory<br data-start=\"5271\" data-end=\"5274\" \/><strong data-start=\"5274\" data-end=\"5287\">Answer: B<\/strong><\/p>\n<hr data-start=\"5289\" data-end=\"5292\" \/>\n<h3 data-start=\"5294\" data-end=\"5320\">89. Segmentation uses:<\/h3>\n<p data-start=\"5321\" data-end=\"5414\">A) Fixed size<br data-start=\"5334\" data-end=\"5337\" \/>B) Variable size segments<br data-start=\"5362\" data-end=\"5365\" \/>C) Cache blocks<br data-start=\"5380\" data-end=\"5383\" \/>D) Disk sectors<br data-start=\"5398\" data-end=\"5401\" \/><strong data-start=\"5401\" data-end=\"5414\">Answer: B<\/strong><\/p>\n<hr data-start=\"5416\" data-end=\"5419\" \/>\n<h3 data-start=\"5421\" data-end=\"5445\">90. Cache memory is:<\/h3>\n<p data-start=\"5446\" data-end=\"5528\">A) Large and slow<br data-start=\"5463\" data-end=\"5466\" \/>B) Small and fast<br data-start=\"5483\" data-end=\"5486\" \/>C) Permanent<br data-start=\"5498\" data-end=\"5501\" \/>D) External<br data-start=\"5512\" data-end=\"5515\" \/><strong data-start=\"5515\" data-end=\"5528\">Answer: B<\/strong><\/p>\n<hr data-start=\"5530\" data-end=\"5533\" \/>\n<h3 data-start=\"5535\" data-end=\"5573\">91. An operating system acts as a:<\/h3>\n<p data-start=\"5574\" data-end=\"5657\">A) Compiler<br data-start=\"5585\" data-end=\"5588\" \/>B) Resource manager<br data-start=\"5607\" data-end=\"5610\" \/>C) Application<br data-start=\"5624\" data-end=\"5627\" \/>D) Text editor<br data-start=\"5641\" data-end=\"5644\" \/><strong data-start=\"5644\" data-end=\"5657\">Answer: B<\/strong><\/p>\n<hr data-start=\"5659\" data-end=\"5662\" \/>\n<h3 data-start=\"5664\" data-end=\"5690\">92. BIOS is stored in:<\/h3>\n<p data-start=\"5691\" data-end=\"5748\">A) RAM<br data-start=\"5697\" data-end=\"5700\" \/>B) Cache<br data-start=\"5708\" data-end=\"5711\" \/>C) ROM<br data-start=\"5717\" data-end=\"5720\" \/>D) Hard disk<br data-start=\"5732\" data-end=\"5735\" \/><strong data-start=\"5735\" data-end=\"5748\">Answer: C<\/strong><\/p>\n<hr data-start=\"5750\" data-end=\"5753\" \/>\n<h3 data-start=\"5755\" data-end=\"5785\">93. BIOS is an example of:<\/h3>\n<p data-start=\"5786\" data-end=\"5873\">A) Application software<br data-start=\"5809\" data-end=\"5812\" \/>B) Firmware<br data-start=\"5823\" data-end=\"5826\" \/>C) Utility software<br data-start=\"5845\" data-end=\"5848\" \/>D) Driver<br data-start=\"5857\" data-end=\"5860\" \/><strong data-start=\"5860\" data-end=\"5873\">Answer: B<\/strong><\/p>\n<hr data-start=\"5875\" data-end=\"5878\" \/>\n<h3 data-start=\"5880\" data-end=\"5912\">94. Interrupt vector stores:<\/h3>\n<p data-start=\"5913\" data-end=\"6002\">A) File names<br data-start=\"5926\" data-end=\"5929\" \/>B) Memory addresses of ISRs<br data-start=\"5956\" data-end=\"5959\" \/>C) CPU speed<br data-start=\"5971\" data-end=\"5974\" \/>D) Disk size<br data-start=\"5986\" data-end=\"5989\" \/><strong data-start=\"5989\" data-end=\"6002\">Answer: B<\/strong><\/p>\n<hr data-start=\"6004\" data-end=\"6007\" \/>\n<h3 data-start=\"6009\" data-end=\"6061\">95. Which of the following is NOT an OS service?<\/h3>\n<p data-start=\"6062\" data-end=\"6167\">A) Process management<br data-start=\"6083\" data-end=\"6086\" \/>B) Memory management<br data-start=\"6106\" data-end=\"6109\" \/>C) Compiling programs<br data-start=\"6130\" data-end=\"6133\" \/>D) File management<br data-start=\"6151\" data-end=\"6154\" \/><strong data-start=\"6154\" data-end=\"6167\">Answer: C<\/strong><\/p>\n<hr data-start=\"6169\" data-end=\"6172\" \/>\n<h3 data-start=\"6174\" data-end=\"6197\">96. IPC stands for:<\/h3>\n<p data-start=\"6198\" data-end=\"6330\">A) Internal Process Control<br data-start=\"6225\" data-end=\"6228\" \/>B) Inter-Process Communication<br data-start=\"6258\" data-end=\"6261\" \/>C) Integrated Program Code<br data-start=\"6287\" data-end=\"6290\" \/>D) Input Process Command<br data-start=\"6314\" data-end=\"6317\" \/><strong data-start=\"6317\" data-end=\"6330\">Answer: B<\/strong><\/p>\n<hr data-start=\"6332\" data-end=\"6335\" \/>\n<h3 data-start=\"6337\" data-end=\"6364\">97. A pipe is used for:<\/h3>\n<p data-start=\"6365\" data-end=\"6468\">A) Scheduling<br data-start=\"6378\" data-end=\"6381\" \/>B) File storage<br data-start=\"6396\" data-end=\"6399\" \/>C) Inter-process communication<br data-start=\"6429\" data-end=\"6432\" \/>D) Memory allocation<br data-start=\"6452\" data-end=\"6455\" \/><strong data-start=\"6455\" data-end=\"6468\">Answer: C<\/strong><\/p>\n<hr data-start=\"6470\" data-end=\"6473\" \/>\n<h3 data-start=\"6475\" data-end=\"6503\">98. A zombie process is:<\/h3>\n<p data-start=\"6504\" data-end=\"6632\">A) Running process<br data-start=\"6522\" data-end=\"6525\" \/>B) Sleeping process<br data-start=\"6544\" data-end=\"6547\" \/>C) Terminated but not removed from process table<br data-start=\"6595\" data-end=\"6598\" \/>D) Blocked process<br data-start=\"6616\" data-end=\"6619\" \/><strong data-start=\"6619\" data-end=\"6632\">Answer: C<\/strong><\/p>\n<hr data-start=\"6634\" data-end=\"6637\" \/>\n<h3 data-start=\"6639\" data-end=\"6679\">99. An orphan process is adopted by:<\/h3>\n<p data-start=\"6680\" data-end=\"6748\">A) Scheduler<br data-start=\"6692\" data-end=\"6695\" \/>B) Kernel<br data-start=\"6704\" data-end=\"6707\" \/>C) Init process<br data-start=\"6722\" data-end=\"6725\" \/>D) BIOS<br data-start=\"6732\" data-end=\"6735\" \/><strong data-start=\"6735\" data-end=\"6748\">Answer: C<\/strong><\/p>\n<hr data-start=\"6750\" data-end=\"6753\" \/>\n<h3 data-start=\"6755\" data-end=\"6804\">100. The main goal of an operating system is:<\/h3>\n<p data-start=\"6805\" data-end=\"6918\">A) Increase hardware cost<br data-start=\"6830\" data-end=\"6833\" \/>B) Reduce memory<br data-start=\"6849\" data-end=\"6852\" \/>C) Efficient resource management<br data-start=\"6884\" data-end=\"6887\" \/>D) Delete files<br data-start=\"6902\" data-end=\"6905\" \/><strong data-start=\"6905\" data-end=\"6918\">Answer: C<\/strong><\/p>\n<hr data-start=\"6920\" data-end=\"6923\" \/>\n<pre data-start=\"6288\" data-end=\"6423\">Advertisement:<\/pre>\n<p data-start=\"6288\" data-end=\"6423\"><a href=\"https:\/\/rgsoftwares.com\/school-management-software\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-4867\" src=\"https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/school-management-software-300x300.png\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" srcset=\"https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/school-management-software-300x300.png 300w, https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/school-management-software-1024x1024.png 1024w, https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/school-management-software-150x150.png 150w, https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/school-management-software-768x768.png 768w, https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/school-management-software.png 1080w\" alt=\"school-management-software\" width=\"300\" height=\"300\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>100 Operating Systems MCQs with Answers (Multiple Choice Questions for Exams &amp; Competitive Tests). Prepare for exams with these 100 Operating Systems MCQs with answers. This comprehensive set of multiple-choice questions covers process management, memory management, scheduling, deadlock, file systems, real-time OS, Linux, and more perfect for computer science students, IT exams, and competitive tests. &#8230; <a title=\"100 Operating Systems MCQs with Answers\" class=\"read-more\" href=\"https:\/\/learn-nest.murreeroad.org\/blog\/100-operating-systems-mcqs-with-answers\/\" aria-label=\"Read more about 100 Operating Systems MCQs with Answers\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":5193,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAowprK_DA:productID":"","om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2106],"tags":[4030,4027,4025,4031,4019,4029,4020,4021,4026,4023,4018,4016,4013,4028,4012,4015,4014,4017,4024,4022],"class_list":["post-5192","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mcqs","tag-bsc-computer-science-mcqs","tag-competitive-exam-os-questions","tag-computer-science-mcqs","tag-computer-science-test-questions","tag-cpu-scheduling-mcqs","tag-cs-fundamentals-mcqs","tag-deadlock-mcqs","tag-file-system-mcqs","tag-it-exam-preparation-questions","tag-linux-os-mcqs","tag-memory-management-mcqs","tag-operating-system-exam-preparation","tag-operating-system-multiple-choice-questions","tag-operating-system-quiz-with-answers","tag-operating-systems-mcqs","tag-operating-systems-objective-questions","tag-os-mcqs-with-answers","tag-process-management-mcqs","tag-real-time-operating-system-mcqs","tag-virtual-memory-mcqs"],"aioseo_notices":[],"uagb_featured_image_src":{"full":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-Operating-Systems-MCQs-with-Answers.png",1024,1536,false],"thumbnail":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-Operating-Systems-MCQs-with-Answers-150x150.png",150,150,true],"medium":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-Operating-Systems-MCQs-with-Answers-200x300.png",200,300,true],"medium_large":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-Operating-Systems-MCQs-with-Answers-768x1152.png",768,1152,true],"large":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-Operating-Systems-MCQs-with-Answers-683x1024.png",683,1024,true],"1536x1536":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-Operating-Systems-MCQs-with-Answers.png",1024,1536,false],"2048x2048":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2026\/02\/100-Operating-Systems-MCQs-with-Answers.png",1024,1536,false]},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/learn-nest.murreeroad.org\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"100 Operating Systems MCQs with Answers (Multiple Choice Questions for Exams &amp; Competitive Tests). Prepare for exams with these 100 Operating Systems MCQs with answers. This comprehensive set of multiple-choice questions covers process management, memory management, scheduling, deadlock, file systems, real-time OS, Linux, and more perfect for computer science students, IT exams, and competitive tests.&hellip;","_links":{"self":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/5192","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/comments?post=5192"}],"version-history":[{"count":1,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/5192\/revisions"}],"predecessor-version":[{"id":5194,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/5192\/revisions\/5194"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/media\/5193"}],"wp:attachment":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/media?parent=5192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/categories?post=5192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/tags?post=5192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}