Question

What is RAM in the context of computer? Why is it needed? What are SRAM and its role in a computer? A computer has primary memory still it requires hard disk, why? Explain the storage organization of a Hard disk and access time for it.

Answer 1

RAM is the random access memory that stores temporary data of the computer.
It is needed to remember the data and necessary functionality required in the performance of some task
SRAM is the static random access memory that uses bi-stable latching circuitry to store each bit.
Because RAM size is very small and it can only store data for a short period of time, say till the computer is not shut down. After that all the data on RAM will be erased, so it requires some permanent hard disk
Hard disk form sectors and tracks to store data. It keeps tracks of the data and keeps the corrupt areas in notice. It can give the access time of 9-15 millisecond.