In a paging system, it takes 30 ns to search translation Look-aside Buffer (TLB) and 90 ns to access the main memory. If the TLB hit ratio is 70%, the effective memory access time is
Effective access time(EAT) = Hit ratio*Time during hit + Miss Ratio * Time During Miss
EAT=0.7*(30+90) + 0.3 (30+90+90)
EAT= 84 + 63
Ans is B
following link is Kvs_Pgt_Question Paper...