FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -SRAM gives fast access to data, but it is physically relatively large. It is used primarily for small amounts of memory called registers in a computer’s central processing unit (CPU) and for fast “cache” memory.

Detailed explanation-2: -Primary storage (also known as main memory, internal memory, or prime memory), often referred to simply as memory, is the only one directly accessible to the CPU.

Detailed explanation-3: -Cache memory, which also is a type of random access memory, does not need to be refreshed. It is built directly into the CPU to give the processor the fastest possible access to memory locations and provides nanosecond speed access time to frequently referenced instructions and data.

Detailed explanation-4: -CPU does not access these memories directly, rather they are accessed through input-output routines. The data hold in secondary memories are transferred to the main memory, and then the CPU can access that data. For instance, disk, CD-ROM, DVD, etc.

Detailed explanation-5: -Cache memory is the fastest system memory, required to keep up with the CPU as it fetches and executes instructions. The data most frequently used by the CPU is stored in cache memory.