11. If the average access time of CPU is 20 ns, access time of main memory is 110 ns and the cache access time is 10 ns, what is the hit ratio?
यदि average access time 20 ns
(Using AMAT = h*10 + (1-h)*110 and solving gives h = 0.9)
यदि average access time 20 ns
(Using AMAT = h*10 + (1-h)*110 and solving gives h = 0.9)
A. main memory access time 110 ns और cache access time 10 ns है
B. तो hit ratio क्या होगा?
C. 100%
D. 90%
Correct Answer: 80%
Explanation (EN): 70%
Explanation (HI): b
12. In a three level memory hierarchy, the access time of cache, main and virtual memory is 5 nano-seconds, 100 nanoseconds and 10 milli-seconds respectively. If the hit ratio is 80 % for the cache and 99.5% for the main memory, then the closest average access time of memory hierarchy in nano-seconds is :
Three level memory hierarchy में cache
(c)
Three level memory hierarchy में cache
(c)
A. main memory और virtual memory के access time क्रमशः 5 ns
B. 100 ns और 10 ms हैं। यदि cache का hit ratio 80% और main memory का 99.5% है
C. तो average access time का निकटतम मान क्या होगा?
D. 512
Correct Answer: 124
Explanation (EN): 10024
Explanation (HI): 128