How primary memory is different from secondary memory? Explain

1.C) How primary memory is different from secondary memory? Explain


Primary Memory:-

  • The memory that is accessible directly by the CPU of a computer is called primary memory.
  • This memory is part of the main computer system which is plugged into the motherboard along with the CPU.
  • Hence, this memory is also called internal memory or main memory.
  • This primary memory allows the CPU to store and retrieve data quickly.

The primary memory is divided into the following types:

  • Random Access Memory (RAM): SRAM and DRAM
  • Read Only Memory (ROM, PROM, EPROM, EEPROM)
  • Cache memory (L1, L2 and L3)
  • CPU registers

Secondary Memory:-

  • The memory that is not part of the computer’s main memory and which is not directly connected to the CPU but connected to the motherboard through ports and connectors is called secondary memory.
  • In secondary memory, we can store all the data and programs permanently and can be moved from one place to another place and can be connected to another computer.
  • The secondary memory is also called auxiliary memory.
  • The data and instructions are loaded from secondary memory to main memory so that the CPU can process the data.
  • Ex: floppy diskette, hard disk, CD-ROMs, magnetic tapes, Blu-ray disk, flash
    memory (Pen drive), etc.
  • The different types of storage devices are shown below:
  • Floppy disk (1.2MB and 1.44MB) which is obsolete
  • Hard disk (500GB to 4TB)
  • Magnetic Tape (20TB)
  • Optical discs: CD-ROM, DVD-ROM, Blue-Ray Disk
  • Flash memory

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