Get answer of your all questions and doubts! ➤ Ask Question QuestionWhat is cache memory? How it is useful? [Computer Science Class – 11 Sumita Arora solutions. Chapter 1 – Computer System Overview.] Answer The cache is special memory with high speed which stores the most recently accessed data.It is useful as it is faster than RAM and lets you access information very quickly than if you access it from hard drive. Related Questions:What is the function of CPU in a computer system? What are its subunits?Distinguish between CPU and ALU.Distinguish between internal and external memory.Draw a block diagram depicting organization of a mobile system.Ask or look other questions and answers.