Q. 68 Consider a system with a two-level paging scheme in which a regular memory
access takes 150 nanoseconds, and servicing a page fault takes 8 milliseconds.
An average instruction takes 100 nanoseconds of CPU time, and two memory
accesses. The TLB hit ratio is 99%, and the page fault rate is one in every 10,000
instructions. What is the effective average instruction execution time?
(A) 645 nanoseconds
(B) 1050 nanoseconds
(C) 1215 nanoseconds
(D) 1230 nanoseconds
Answer: (D)
Explanation:
