Operating System Mcqs

Page No. 68

The algorithm in which we allocate memory to each process according to its size is known as ____________


aproportional allocation algorithm

✓


bequal allocation algorithm

✖


csplit allocation algorithm

✖


dnone of the mentioned

✖



The algorithm in which we split m frames among n processes, to give everyone an equal share, m/n frames is known as ____________


aproportional allocation algorithm

✖


bequal allocation algorithm

✓


csplit allocation algorithm

✖


dnone of the mentioned

✖



The maximum number of frames per process is defined by ____________


athe amount of available physical memory

✓


boperating System

✖


cinstruction set architecture

✖


dnone of the mentioned

✖



Consider a machine in which all memory reference instructions have only one memory address, for them we need at least _____ frame(s).


aone

✖


btwo

✓


cthree

✖


dnone of the mentioned

✖


View Answer two

When a page fault occurs before an executing instruction is complete if ____________


athe instruction must be restarted

✓


bthe instruction must be ignored

✖


cthe instruction must be completed ignoring the page fault

✖


dnone of the mentioned

✖



The minimum number of frames to be allocated to a process is decided by the ____________


athe amount of available physical memory

✖


boperating System

✖


cinstruction set architecture

✓


dnone of the mentioned

✖



Consider the following page reference string.
1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6
For Optimal page replacement algorithms with 3 frames, the number of page faults is?


a16

✖


b15

✖


c14

✖


d11

✓


View Answer 11

Consider the following page reference string.
1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6
For FIFO page replacement algorithms with 4 frames, the number of page faults is?


a16

✖


b15

✖


c14

✓


d11

✖


View Answer 14

Consider the following page reference string.
1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6
For FIFO page replacement algorithms with 3 frames, the number of page faults is?


a16

✓


b15

✖


c14

✖


d11

✖


View Answer 16

Consider the following page reference string.
1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6
For LRU page replacement algorithm with 5 frames, the number of page faults is?


a10

✖


b14

✖


c8

✓


d11

✖


View Answer 8

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