Operating System - Practice Test

[#326] 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

Correct Answer

(B) recognition of basic elements and creation of uniform symbols

Explanation

Solution: In analyzing the compilation of PL/I program, the term "Lexical analysis" is associated with recognition of basic elements and creation of uniform symbols.

[#327] Resolution of externally defined symbols is performed by

(A) Linker

(B) Loader

(C) Compiler

(D) Assembler

Correct Answer

(A) Linker

Explanation

Solution: Resolution of externally defined symbols is performed by Linker

[#328] System generation is

(A) is always quite simple

(B) is always very difficult

(C) varies in difficulty between systems

(D) requires extensive tools to be understandable

Correct Answer

(C) varies in difficulty between systems

Explanation

Solution: In computing system generation or sysgen is the process of creating a particular unique instance of an operating system by combining user-specified options and parameters with manufacturer-supplied general-purpose program code to produce an operating system tailored for a particular hardware and software environment. A large general-purpose program such as an operating system has to provide support for all variations of Central processing unit (CPU) that it might be run on, for all supported main memory sizes, and for all possible configurations of input/output (I/O) equipment. No one installation requires all this support, so system generation provides a process for selecting the options and features actually required on any one system.

[#329] The Memory Address Register

(A) is a hardware memory device which denotes the location of the current instruction being executed.

(B) is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.

(C) contains the address of the memory location that is to be read from or stored into.

(D) contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".

Correct Answer

(C) contains the address of the memory location that is to be read from or stored into.

Explanation

Solution: The Memory Address Register contains the address of the memory location that is to be read from or stored into.

[#330] In virtual memory systems, Dynamic address translation

(A) is the hardware necessary to implement paging

(B) stores pages at a specific location on disk

(C) is useless when swapping is used

(D) is part of the operating system paging algorithm

Correct Answer

(A) is the hardware necessary to implement paging

Explanation

Solution: In virtual memory systems, Dynamic address translation is the hardware necessary to implement paging

Operating System - Study Mode

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

Correct Answer

Explanation

[#327] Resolution of externally defined symbols is performed by

Correct Answer

Explanation

[#328] System generation is

Correct Answer

Explanation

[#329] The Memory Address Register

Correct Answer

Explanation

[#330] In virtual memory systems, Dynamic address translation

Correct Answer

Explanation