Classical

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 :


24:  

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

A.

Seek time, access time, transfer time

B.

Seek time, latency time, transfer time

C.

Access time ,Latency time, transfer time

D.

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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