Operating System Questions

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311.

Which of the following refers to the associative memory?

A

the address of the data is generated by the CPU

B

the address of the data is supplied by the users

C

there is no need for an address i.e. the data is used as an address

D

the data are accessed sequentially

E

None of the above

Correct Answer: C

None.

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312.

To avoid the race condition, the number of processes that may be simultaneously inside their critical section is

A

8

B

1

C

16

E

None of the above

Correct Answer: B

To avoid the race condition, the number of processes that may be simultaneously inside their critical section is 1.

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313.

A system program that combines the separately compiled modules of a program into a form suitable for execution

A

assembler

B

linking loader

C

cross compiler

D

load and go

E

None of the above

Correct Answer: B

A system program that combines the separately compiled modules of a program into a form suitable for execution is linking loader.

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314.

Process is

A

program in High level language kept on disk

B

contents of main memory

C

a program in execution

D

a job in secondary memory

E

None of the above

Correct Answer: C

Process is a program in execution.

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315.

Addressing structure

A

defines the fundamental method of determining effective operand addresses

B

are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.

C

performs indicated operations on two fast registers of the machine and leave the result in one of the registers.

D

all of the above

E

None of the above

Correct Answer: A

Addressing structure is defines the fundamental method of determining effective operand addresses.

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316.

The Memory Buffer Register (MBR)

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".

E

None of the above

Correct Answer: D

The Memory Buffer Register (MBR) 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".

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317.

The strategy of allowing processes that are logically runnable to be temporarily suspended is called

A

preemptive scheduling

B

non preemptive scheduling

C

shortest job first

D

first come first served

E

None of the above

Correct Answer: A

The strategy of allowing processes that are logically runnable to be temporarily suspended is called preemptive scheduling.

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318.

The Storage-to-Storage instructions

A

have both their operands in the main store.

B

which perform an operation on a register operand and an operand which is located in the main store, generally leaving the result in the register, expect in the case of store operation when it is also

C

which perform indicated operations on two fast registers of the machine and have the result in one of the registers

D

all of the above

E

None of the above

Correct Answer: A

The Storage-to-Storage instructions have both their operands in the main store.

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319.

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

Correct Answer: C

In a computer operating system that uses paging for virtual memory management, page replacement algorithms decide which memory pages to page out, sometimes called swap out, or write to disk, when a page of memory needs to be allocated.

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320.

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

Correct Answer: B

Utility program systems software does the job of merging the records from two files into one

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