Operating Systems Concepts - Section 1 (3)

17.

Resolution of externally defined symbols is performed by

A.	Linker
B.	Loader
C.	Compiler
D.	Assembler
E.	None of the above

Answer: Option A

Explanation:

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18.

In analyzing the compilation of PL/I program, the term "Lexical analysis" is associated with

A.	recognition of basic syntactic constructs through reductions.
B.	recognition of basic elements and creation of uniform symbols
C.	creation of more optional matrix.
D.	use of macro processor to produce more optimal assembly code
E.	None of the above

Answer: Option B

Explanation:

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19.

Thrashing can be avoided if

A.	the pages, belonging to the working set of the programs, are in main memory
B.	the speed of CPU is increased
C.	the speed of I/O processor is increased
D.	all of the above
E.	None of the above

Answer: Option A

Explanation:

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20.

Assembly code data base is associated with

A.	assembly language version of the program which is created by the code generation phase and is input to the assembly phase.
B.	a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure.
C.	consists of a full or partial list or the token's as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation.
D.	a permanent table which lists all key words and special symbols of the language in symbolic form.
E.	None of the above

Answer: Option A

Explanation:

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21.

The register or main memory location which contains the effective address of the operand is known as

A.	pointer
B.	indexed register
C.	special location
D.	scratch pad
E.	None of the above

Answer: Option A

Explanation:

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22.

The principle of locality of reference justifies the use of

A.	reenterable
B.	non reusable
C.	virtual memory
D.	cache memory
E.	None of the above

Answer: Option D

Explanation:

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23.

What is the name given to the organized collection of software that controls the overall operation of a computer?

A.	Working system
B.	Peripheral system
C.	Operating system
D.	Controlling system
E.	None of the above

Answer: Option C

Explanation:

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24.

The FIFO algorithm

A.	executes first the job that last entered the queue
B.	executes first the job that first entered the queue
C.	execute first the job that has been in the queue the longest
D.	executes first the job with the least processor needs
E.	None of the above

Answer: Option B

Explanation:

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