Memory 

Memory is the storage space in the computer where data get the process and instructions required for processing get store. The memory is split into a large number of small parts known as cells. Each location or cell has a unique address which varies from zero to memory size minus one.

Computer Knowledge Basic General Computer Awareness

Memory is of three types

  • Cache Memory
  • Primary Memory
  • Secondary Memory

Cache Memory

Cache memory is a very high-speed semiconductor memory which can speed up CPU. It acts as a buffer between the CPU and main memory.

Primary Memory (Main Memory)

  1. Primary memory holds only those data and instructions on which computer is currently working.
  2. It has limited capacity and data is lost when power is switched off.
  3. It is generally made up of the semiconductor device.
  4. The data and instruction require being processed reside in main memory.

There are two sub-categories ROM and RAM in Primary memory.

RAM :

The RAM (random access memory) is the place in a computer where the operating system, application programs, and data in current use are kept.

RAM is much faster to read from and write to than the other kinds of storage in a computer, the hard disk, floppy disk, and CD-ROM.

It has two parts:

A. SRAM: Static Random Access Memory

B. DRAM: Dynamic Random Access Memory.

ROM:

As the name suggests ROM, stores information that can only be read. Modifying it is impossible or very difficult.

ROM is also a type of non-volatile storage, which means that the information in it stays even if the computer loses power.

This is another type of ROM that is impossible or difficult to change.

  • PROM – Programmable Read Only Memory.
  • EPROM – Erasable Programmable Read Only Memory.
  • EEPROM – Electrically Erasable Programmable Read Only Memory.

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