Computer Storage Units and Memory
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Questions and Answers

What is the full form of RAM?

  • Remote Area Module
  • Random Access Memory (correct)
  • Real Audio Media
  • Read And Modify

Which of the following is an example of secondary storage?

  • ALU
  • CPU
  • Hard Disk (correct)
  • Register

How much memory is required to store a 16-bit word?

  • 1 byte
  • 8 bytes
  • 16 bytes
  • 2 bytes (correct)

What is the full form of ROM?

<p>Read Only Memory (C)</p> Signup and view all the answers

Which of the following is NOT a secondary storage device?

<p>Monitor (B)</p> Signup and view all the answers

Study Notes

Computer Storage

  • Computer storage refers to the components and recording media used to retain digital data
  • Two types of storage: primary memory and secondary memory

Primary Memory

  • Also known as Main Memory or RAM (Random Access Memory)
  • Temporarily holds data and applications while the CPU processes them
  • Volatile: loses data when power is turned off

Secondary Memory

  • Also known as External Memory or Non-Volatile Memory
  • Permanently stores data even when power is turned off
  • Examples of secondary storage devices:
    • Hard Disk Drive (HDD)
    • Solid State Drive (SSD)
    • Flash Drive
    • CD (Compact Disc)
    • DVD (Digital Versatile Disc)
    • Magnetic Tape

RAM and ROM

  • RAM (Random Access Memory): temporarily stores data and applications while the CPU processes them
  • ROM (Read-Only Memory): permanently stores data and cannot be changed or written by the CPU
  • ROM is non-volatile: retains data even when power is turned off

Calculating Memory Needed

  • To calculate the memory needed to store different words:
    • 1 character = 1 byte
    • 1 kilobyte (KB) = 1024 bytes
    • 1 megabyte (MB) = 1024 kilobytes
    • 1 gigabyte (GB) = 1024 megabytes
    • Example: a 10-character word needs 10 bytes of memory

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Description

Test your knowledge of primary and secondary memory, RAM and ROM, and different storage units. Calculate memory needs and identify secondary storage devices.

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