Computer Organization and Architecture

Question 241

Let WB and WT be two set associative cache organizations that use LRU algorithm for cache block replacement. WB is a write back cache and WT is a write through cache. Which of the following statements is/are FALSE?

• Each cache block in WB and WT has a dirty bit

• Every write hit in WB leads to a data transfer from cache to main memory. 

• Eviction of a block from WT will not lead to data transfer from cache to main memory

• A read miss in WB will never lead to eviction of a dirty block from WB