Operating System Questions

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511.

The command interpreter

A

is usually the primary user interface

B

requires fixed format commands

C

is menu drive

D

is quite different from the SCL interpreter

E

None of the above

Correct Answer: A

The command interpreter is usually the primary user interface

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512.

A task in a blocked state

A

is executable

B

is running

C

must still be placed in the run queues

D

is waiting for same temporarily unavailable resources

E

None of the above

Correct Answer: D

A task in a blocked state is waiting for same temporarily unavailable resources

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513.

System maintenance:

A

is usually not necessary

B

is necessary on all systems, regardless of how good

C

is not required if the system is well written

D

always requires several programs

E

None of the above

Correct Answer: B

System maintenance is necessary on all systems, regardless of how good

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514.

A linker

A

creates a load module

B

is not necessary with variable partitions

C

must be run after the loader

D

is not needed with a good compiler

E

None of the above

Correct Answer: A

A linker creates a load module

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515.

Uniform Symbols Table

A

contains all constants in the program

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 of 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

Correct Answer: C

Uniform Symbols Table consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation

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516.

In which of the storage placement strategies a program is placed in the smallest available hole in the main memory?

A

best fit

B

first fit

C

worst fit

D

buddy

E

None of the above

Correct Answer: A

None.

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517.

In which addressing mode, the effective address of the operand is generated by adding a constant value to the contents of register?

A

absolute mode

B

indirect mode

C

immediate mode

D

index mode

E

None of the above

Correct Answer: D

None.

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518.

The higher versions of the operating systems are so written that programs designed for earlier versions can still be run. What is it called?

A

Upgradability

B

Upward mobility

C

Universality

D

Upward compatibility

E

None of the above

Correct Answer: D

Refers to software that runs not only on the computer for which it was designed, but also on newer and more powerful models. For example, a program designed to run on an Intel 386 microprocessor, which also runs on a Pentium, is upward compatible. Upward compatibility is important because it means you can move to a newer, larger, and more sophisticated computer without converting your data.

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519.

If special forms are needed for printing the output, the programmer specifies these forms through?

A

JCL

B

JPL

C

Utility programs

D

Load modules

E

None of the above

Correct Answer: A

Job Control Language (JCL) is a name for scripting languages used on IBM mainframe operating systems to instruct the system on how to run a batch job or start a subsystem. More specifically, the purpose of JCL is to say which programs to run, using which files or devices for input or output, and at times to also indicate under what conditions to skip a step.

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520.

Which policy replace a page if it is not in the favoured subset of a process's pages?

A

FIFO

B

LRU

C

LFU

D

Working set

E

None of the above

Correct Answer: D

None.

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