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Computer Science Set-1
Operating System
55

Operating System MCQ with Answers

55) If there are 32 segments, each of size 1 K byte, then the logical address should have

13 bits

14 bits

15 bits

16 bits

Answer is:

15 bits

Operating System MCQ with Answers

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Related Operating System MCQ with Answers

56) The first-fit, best-fit and the worst-fit algorithm can be used for

contiguous allocation of memory

linked allocation of memory

indexed allocation of memory

all of these

Answer is:

contiguous allocation of memory

57) Consider a computer with 8 Mbytes of main memory and a 128 K cache. The cache block size is 4 K. It uses a direct mapping scheme for cache management. How many different main memory blocks can map onto a given physical cache block ?

2048

256

64

None of these

Answer is:

64

58) Consider the following heap :
JOB1-50 FREE-150 JOB2-300 FREE-350 JOB3-600
The sequence of requests for blocks of sizes 300, 25, 125, 50 can be satisfied if we use

either first fit or best fit policy

first fit, but not best fit

best fit, but not first fit

none of these

Answer is:

first fit, but not best fit

59) Cached and interleaved memories are ways of speeding up memory access between CPUs and slower RAM. Which memory models are best suited (i.e. improves performance the most) for which programs ?
(i) Cached memory is best suited for small loops.
(ii) Interleaved memory is best suited for small loops.
(iii) Interleaved memory is best suited for large sequential code.
(iv) Cached memory is best suited for large sequential code.

(i) and (ii) are true

(i) and (iii) are true

(iv) and (ii) are true

(iv) and (iii) are true

Answer is:

(i) and (iii) are true

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