Computer Organization Architecture - Cache and main memory

21:   Which of the following need extra hardware for DRAM refreshing ?
A. 8085
B. Motorla-68000
C. Both (a) and (b)
D. None of these

Option: C

Explanation :

22:   The idea of cache memory is based on
A. The property of locality of reference
B. The heuristic 90-10 rule
C. The fact that only a small portion of a program is referenced relatively frequently
D. None of these

Option: A

Explanation :

23:   Property of locality of reference may fail, if a program has
A. Many conditional jumps
B. Many unconditional jumps
C. Many operands
D. Many Operators

Option: C

Explanation :


What is the correct sequence of time delays that happen during a data transfer from a disk to memory?


Seek time, access time, transfer time


Seek time, latency time, transfer time


Access time ,Latency time, transfer time


Latency time, access time, transfer time


Option: B

Explanation :

25:   How many RAM chips of size (256K x 1 bit) are required to build 1M Byte memory ?
A. 8
B. 12
C. 24
D. 32

Option: D

Explanation :

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