Operating Systems Concepts - Section 1 (5)

33.

Interprocess communication

A.	is required for all processes
B.	is usually done via disk drives
C.	is never necessary,
D.	allows processes to synchronize activity

Answer: Option D

Explanation:

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34.

Which of the following statements is false?

A.	the technique of storage compaction involves moving all occupied areas of storage to one end or other of main storage
B.	compaction does not involve relocation of programs
C.	compaction is also know as garbage collection
D.	the system must stop everything while it performs the compaction
E.	None of the above

Answer: Option B

Explanation:

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35.

Which of the following instruction steps, would be written within the diamond-shaped box, of a flowchart?

A.	S = B - C
B.	IS A<10
C.	PRINT A
D.	DATA X,4Z
E.	None of the above

Answer: Option B

Explanation:

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36.

Supervisor state is

A.	never used
B.	entered by programs when they enter the processor
C.	required to perform any I/O
D.	only allowed to the operating system
E.	None of the above

Answer: Option D

Explanation:

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37.

Thrashing

A.	is a natural consequence of virtual memory systems
B.	can always be avoided by swapping
C.	always occurs on large computers
D.	can be caused by poor paging algorithms
E.	None of the above

Answer: Option D

Explanation:

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38.

Fork is

A.	the dispatching of a task
B.	the creation of a new job
C.	the creation of a new process
D.	increasing the priority of a task
E.	None of the above

Answer: Option C

Explanation:

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39.

Which of the following systems software does the job of merging the records from two files into one?

A.	Security software
B.	Utility program
C.	Networking software
D.	Documentation system
E.	None of the above

Answer: Option B

Explanation:

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40.

The LRU algorithm

A.	pages out pages that have been used recently
B.	pages out pages that have not been used recently
C.	pages out pages that have been least used recently
D.	pages out the first page in a given area
E.	None of the above

Answer: Option C

Explanation:

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