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Operating Systems Review
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Operating Systems Review
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25 Questions

1. In the bounded buffer problem, there are the empty and full semaphores that :
2. The address of the next instruction to be executed by the current process is provided by the
3. Which of the following is not a fundamental process state
4. In indirect communication between processes P and Q :
5. The interval from the time of submission of a process to the time of completion is termed as
6. In the Zero capacity queue :
7. A critical section is a program segment
8. A memory buffer used to accommodate a speed differential is called
9. With ................ a page is brought into main memory only when the reference is made to a location on that page.
10. . To avoid deadlock
11. The short-term scheduler (or CPU scheduler) carries out the -----------
12. The Banker’s algorithm is used
13. Which one of the following is the address generated by CPU?
14. For a deadlock to arise, which of the following conditions must hold simultaneously ?
15. ‘LRU’ page replacement policy is
16. Which of the following condition is required for deadlock to be possible?
17. What is a shell?
18. A memory page containing a heavily used variable that was initialized very early and is in constant use is removed, then the page replacement algorithm used is :
19. Two methods how LRU page replacement policy can be implemented in hardware are :
20. First-in-First-Out (FIFO) scheduling is
21. The “turn-around” time of a user job is the
22. What is interprocess communication?
23. here is a set of page replacement algorithms that can never exhibit Belady’s Anomaly, called :
24. A FIFO replacement algorithm associates with each page the _______
25. Which of the following page replacement algorithms suffers from Belady’s Anomaly ?

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