Computer Science - Operating Systems Concepts

31. 

Four necessary conditions for deadlock to exist are: mutual exclusion, no-preemption, circular wait and

A. hold and wait
B. deadlock avoidance
C. race around condition
D. buffer overflow
E. None of the above

Answer: Option A

Explanation:

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32. 

If you do not know which version of MS-DOS you are working with, which command will you use after having booted your operating system?

A. FORMAT command
B. DIR command
C. VER command
D. DISK command
E. None of the above

Answer: Option C

Explanation:

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33. 

A partitioned data set is most used for

A. a program or source library
B. storing program data
C. storing backup information
D. storing ISAM files
E. None of the above

Answer: Option A

Explanation:

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34. 

Page-map table is

A. A data file
B. A directory
C. Used for address translation
D. All of the above
E. None of the above

Answer: Option C

Explanation:

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35. 

The main function of the dispatcher (the portion of the process scheduler) is

A. swapping a process to the disk
B. assigning ready process to the CPU
C. suspending some of the processes when the CPU load is high
D. bring processes from the disk to the main memory
E. None of the above

Answer: Option B

Explanation:

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