Operating System Interview Questions & Answers
Operating System Interview Online Test
1. Explain the concept of Reentrancy.
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2. Explain Belady's Anomaly.
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3. What is a binary semaphore? What is its use?
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4. What is thrashing?
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5. List the Coffman's conditions that lead to a deadlock.
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6. What are short-, long- and medium-term scheduling?
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7. What are turnaround time and response time?
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8. What are the typical elements of a process image?
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9. What is the Translation Lookaside Buffer (TLB)?
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10. What is the resident set and working set of a process?
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11. When is a system in safe state?
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12. What is cycle stealing?
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13. What is meant by arm-stickiness?
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14. What are the stipulations of C2 level security?
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15. What is busy waiting?
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16. Explain the popular multiprocessor thread-scheduling strategies.
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17. When does the condition 'rendezvous' arise?
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18. What is a trap and trapdoor?
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19. What are local and global page replacements?
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20. Define latency, transfer and seek time with respect to disk I/O.
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21. Describe the Buddy system of memory allocation.
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22. What is time-stamping?
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23. How are the wait/signal operations for monitor different from those for semaphores?
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24. In the context of memory management, what are placement and replacement algorithms?
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25. In loading programs into memory, what is the difference between load-time dynamic linking and run-time dynamic linking?
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26. What are demand- and pre-paging?
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27. Paging a memory management function, while multiprogramming a processor management function, are the two interdependent?
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28. What is page cannibalizing?
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29. What has triggered the need for multitasking in PCs?
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30. What are the four layers that Windows NT have in order to achieve independence?
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31. What is SMP?
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32. What are the key object oriented concepts used by Windows NT?
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33. Is Windows NT a full blown object oriented operating system? Give reasons.
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34. What is a drawback of MVT?
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35. What is process spawning?
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36. How many jobs can be run concurrently on MVT?
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37. List out some reasons for process termination.
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38. What are the reasons for process suspension?
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39. What is process migration?
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40. What is mutant?
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41. What is an idle thread?
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42. What is FtDisk?
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43. What are the possible threads a thread can have?
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44. What are rings in Windows NT?
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45. What is Executive in Windows NT?
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46. What are the sub-components of I/O manager in Windows NT?
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47. What are DDks? Name an operating system that includes this feature.
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48. What level of security does Windows NT meets?
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49. What is an operating system?
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50. What are the various components of a computer system?
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51. What is purpose of different operating systems?
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52. What are the different operating systems?
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53. Explain the concept of the batched operating systems?
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54. Explain the concept of the multi-programmed operating systems?
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55. Explain the concept of the timesharing operating systems?
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56. Explain the concept of the multi-processor systems or parallel systems?
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57. Explain the concept of the Distributed systems?
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58. Explain the concept of Real-time operating systems?
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59. Define MULTICS?
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60. What is SCSI?
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61. What is a sector?
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62. What is cache-coherency?
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63. What are residence monitors?
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64. What is dual-mode operation?
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65. What are the operating system components?
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66. What are operating system services?
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67. What are system calls?
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68. What is a layered approach and what is its advantage?
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69. What is micro kernel approach and site its advantages?
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70. What are a virtual machines and site their advantages?
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71. What are a virtual machines and site their advantages?
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72. What is a process?
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73. What are the states of a process?
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74. What are various scheduling queues?
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75. What is a job queue?
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76. What is a ready queue?
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77. What is a device queue?
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78. What is a long term scheduler & short term schedulers?
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79. What is context switching?
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80. What are the disadvantages of context switching?
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81. What are co-operating processes?
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82. What is a thread?
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83. What are the benefits of multithreaded programming?
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84. What are types of threads?
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85. Which category the java thread do fall in?
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86. What are multithreading models?
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87. What is a P-thread?
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88. What are java threads?
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89. What is process synchronization?
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90. What is critical section problem?
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91. What is a semaphore?
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92. What is bounded-buffer problem?
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93. What is readers-writers problem?
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94. What is dining philosophers problem?
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95. What is a deadlock?
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96. What are necessary conditions for dead lock?
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97. What is resource allocation graph?
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98. What are deadlock prevention techniques?
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99. What is a safe state and a safe sequence?
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100. What are the deadlock avoidance algorithms?
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101. What are the basic functions of an operating system?
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102. Explain briefly about, processor, assembler, compiler, loader, linker and the functions executed by them.
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103. What is a Real-Time System?
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104. What is the difference between Hard and Soft real-time systems?
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105. What is virtual memory?
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106. What is cache memory?
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107. Differentiate between Complier and Interpreter?
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108. What are different tasks of Lexical Analysis?
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109. Why paging is used?
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110. What is Context Switch?
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111. Distributed Systems?
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112. Difference between Primary storage and secondary storage?
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113. What is CPU Scheduler?
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114. What do you mean by deadlock?
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115. What is Dispatcher?
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116. What is Throughput, Turnaround time, waiting time and Response time?
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117. Explain the difference between microkernel and macro kernel?
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118. What is the cause of thrashing? How does the system detect thrashing? Once it detects thrashing, what can the system do to eliminate this problem?
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119. Under what circumstances do page faults occur? Describe the actions taken by the operating system when a page fault occurs?
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120. Explain Segmentation with paging?
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121. Define Demand Paging, Page fault interrupt, and Trashing?
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122. What is fragmentation? Different types of fragmentation?
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123. What are Dynamic Loading, Dynamic Linking and Overlays?
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124. What is Memory-Management Unit (MMU)?
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125. Binding of Instructions and Data to Memory?
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126. Difference between Logical and Physical Address Space?
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127. Recovery from Deadlock?
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128. What is a Safe State and its use in deadlock avoidance?
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129. What are the Methods for Handling Deadlocks?
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130. Different types of Real-Time Scheduling?
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131. What is starvation and aging?
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132. Give a non-computer example of preemptive and non-preemptive scheduling?
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133. What is multi tasking, multi programming, multi threading?
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134. What do you mean by deadlock?
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135. What is Dispatcher?
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136. What is Throughput, Turnaround time, waiting time and Response time?
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137. Distributed Systems?
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