engineering computer science MCQ #240

engineering computer science MCQ #240

1. Question 1

   Q1. What is the purpose of the 'dirty' bit in a cache?

   • A) To indicate that the cache line is valid
   • B) To indicate that the cache line has been modified
   • C) To indicate that the cache line is empty
   • D) To indicate that the cache line is being accessed

   Answer: To indicate that the cache line has been modified

   Explanation: The 'dirty' bit indicates that the cache line has been modified and needs to be written back to main memory.