Question

The bit used to indicate whether the block was recently used or not is _______

(a) Idol bit

(b) Control bit

(c) Reference bit

(d) Dirty bit

This question was posed to me at a job interview.

I'd like to ask this question from Mapping Functions topic in chapter Memory System of Computer Architecture

Answer 1

Right answer is (d) Dirty bit

The explanation: The dirty bit is used to show that the block was recently modified and for a replacement algorithm.