Memory Management Questions

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81.

Memory protection in a paged environment is accomplished by ____________

A

protection algorithm with each page

B

restricted access rights to users

C

restriction on page visibility

D

protection bit with each page

Correct Answer: D

None.

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82.

When the valid-invalid bit is set to valid, it means that the associated page ____________

A

is in the TLB

B

has data in it

C

is in the process's logical address space

D

is the system's physical address space

Correct Answer: C

None.

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83.

Illegal addresses are trapped using the _____ bit.

A

error

B

protection

C

valid-invalid

D

access

Correct Answer: C

None.

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84.

When there is a large logical address space, the best way of paging would be ____________

A

not to page

B

a two level paging algorithm

C

the page table itself

D

all of the mentioned

Correct Answer: B

None.

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85.

In a paged memory, the page hit ratio is 0.35. The required to access a page in secondary memory is equal to 100 ns. The time required to access a page in primary memory is 10 ns(nano seconds). The average time required to access a page is?

A

3.0 ns

B

68.0 ns

C

68.5 ns

D

78.5 ns

Correct Answer: C

None.

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86.

To obtain better memory utilization, dynamic loading is used. With dynamic loading, a routine is not loaded until it is called. For implementing dynamic loading ____________

A

special support from hardware is required

B

special support from operating system is essential

C

special support from both hardware and operating system is essential

D

user programs can implement dynamic loading without any special support from hardware or operating system

Correct Answer: D

None.

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87.

In paged memory systems, if the page size is increased, then the internal fragmentation generally ____________

A

becomes less

B

becomes more

C

remains constant

D

none of the mentioned

Correct Answer: B

None.

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88.

In segmentation, each address is specified by ____________

A

a segment number

B

an offset and value

C

a value and segment number

D

a key and value

Correct Answer: A

None.

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89.

In paging the user provides only ________ which is partitioned by the hardware into ________ and ______

A

one address, page number, offset

B

one offset, page number, address

C

page number, offset, address

D

none of the mentioned

Correct Answer: A

None.

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90.

Each entry in a segment table has a ____________

A

segment base

B

segment peak

C

segment value

D

none of the mentioned

Correct Answer: A

None.

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