12. Pages and frames sizes: 17. SJF (shortest job first) scheduling improves A.
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12. Pages and frames sizes: 17. SJF (shortest job first) scheduling improves A. are the same size B. can have independent sizes C. Bexible, as long as frames are bigger A. average turnaround time B. average waiting in the ready queue time in the ready C. both of the above than pages D. frame size must be a power of 2 of 18. Small quantum in CPU scheduling the page size A. reduces context-switch overhead B. increases context-switch overhead C. does not affect the context switch 13. The TLB is A. a register with translation of lowest process buffer B. a cache on the page table C. a thread that is related to the curretindicates overhead 19. The base register for a process address space A. start of the logical address space B. start of the physical address space C. start of the operating system address D. used to translate long frame ad- dresses in memory 14. A process of size 5 units is allocated 7 units of memory. These 7 units allocation are placed space in a memory fragment of length 10. Then ex20. Linux commands ternal and internal fragmentation, respectively "touch a aa ab ba; 1s I egrep will A. 5 and 7 B. 7 and 5 C. 2 and 3 D. 3 and 2 A. a C, a aa ab D. a aa ab ba 15. The fork) system call is used to 21. Linux commands A. create a new process B. send message to another process C. give more resources to a process on "touch a aa ab ba; 1s I egrop a*$ will produce demand C. a aa ab D. a aa ab ba D. transfer control to a branch after an if statement 16. Non-preemptive scheduling 22. In priority CPU scheduling, the problem A. allows equal time to all processes B. lets a process to use as much CPU starvation is solved by A. using round robin B. changing the quantum C. aging D. increasing memory allocation time as it needs C. has effect of having a very small quantum D. has effect of rapid context switching Page 3Explanation / Answer
12. pages and frames sizes : are the same size
13. the TLB is a cache on the page table
15. the fork() system call used to create a new process.
17. THE SJF SCHEDULING IMPROVES AVERAGE waiting in the ready quence time in the ready
18 .small quantum in cpu scheduling increase context switch overhead
19.the base register for process address space indicates starting of logical address space
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