Memory Management Questions

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121.

The valid

A

the page is not legal

B

the page is illegal

C

the page is in memory

D

the page is not in memory

Correct Answer: C

None.

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122.

A page fault occurs when?

A

a page gives inconsistent data

B

a page cannot be accessed due to its absence from memory

C

a page is invisible

D

all of the mentioned

Correct Answer: B

None.

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123.

When a page fault occurs, the state of the interrupted process is ____________

A

disrupted

B

invalid

C

saved

D

none of the mentioned

Correct Answer: C

None.

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124.

When a process begins execution with no pages in memory?

A

process execution becomes impossible

B

a page fault occurs for every page brought into memory

C

process causes system crash

D

none of the mentioned

Correct Answer: B

None.

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125.

If the memory access time is denoted by

A

p x ma + (1-p) x page fault time

B

ma + page fault time

C

(1-p) x ma + p x page fault time

D

none of the mentioned

Correct Answer: C

None.

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126.

When the page fault rate is low ____________

A

the turnaround time increases

B

the effective access time increases

C

the effective access time decreases

D

turnaround time & effective access time increases

Correct Answer: C

None.

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127.

Locality of reference implies that the page reference being made by a process ____________

A

will always be to the page used in the previous page reference

B

is likely to be one of the pages used in the last few page references

C

will always be one of the pages existing in memory

D

will always lead to page faults

Correct Answer: B

None.

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128.

Which of the following page replacement algorithms suffers from Belady

A

Optimal replacement

B

LRU

C

FIFO

D

Both optimal replacement and FIFO

Correct Answer: C

None.

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129.

A process refers to 5 pages, A, B, C, D, E in the order : A, B, C, D, A, B, E, A, B, C, D, E. If the page replacement algorithm is FIFO, the number of page transfers with an empty internal store of 3 frames is?

A

8

B

10

C

9

D

7

Correct Answer: C

None.

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130.

A memory page containing a heavily used variable that was initialized very early and is in constant use is removed, then the page replacement algorithm used is ____________

A

LRU

B

LFU

C

FIFO

D

None of the mentioned

Correct Answer: C

None.

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