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GATE 2023 Computer Organization & Architecture Quiz 14

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Question 1

The characteristics of a Dynamic RAM chip over a static RAM chip are?

Question 2

Which of the following is/are true?

S1 : The main advantage of direct mapping is that the cache hit ratio increases drastically if two or more frequently used blocks map onto same region.

S2 : For two level memory hierarchy cache and main memory, WRITE THROUGH results in more write cycles to main memory than WRITE BACK.

Question 3

How many 2K × 1 RAM chips are needed to provide a capacity of 16KB memory?

Question 4

A 2- level memory system has levels with access time T1 = 15 ns and T2 = 200 ns. The hit ratio for this system is 0.9. If average access time is increased by 15%. What will be the change in hit ratio?

Question 5

Consider a two-level cache hierarchy with L1 and L2 caches. An application incurs 1.4 memory accesses per instruction on average. For this application, the miss rate of L1 cache 0.1, the L2 cache experiences, on average, 7 misses per 1000 instructions. The miss rate of L2 expressed correct to two decimal places is _____.

Question 6

Consider a 2- level memory hierarchy L1 (cache) has an accessing time of 10 nsec and main memory has accessing time 100 nsec. Assume the hit ratio read operation is 0.75 and 40% references are for write operation. The average access time for system (in nsec) if it uses write through technique ________. (Upto 1 decimal places)
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Aug 31GATE & PSU CS