Which type of memory is non-volatile and permanently stores data?

Read-Only Memory (ROM) is a non-volatile memory that permanently stores data and instructions required by the computer. Unlike volatile memory, the information stored in ROM is not lost when the power is switched off. Since its contents remain unchanged under... Read More

1 COMPUTER ARCHITECTURE MCQS

Which type of memory is non-volatile and permanently stores data?

  • RAM
  • ROM
  • BIOS
  • CHACHE
Correct Answer: B. ROM

Detailed Explanation

Read-Only Memory (ROM) is a non-volatile memory that permanently stores data and instructions required by the computer. Unlike volatile memory, the information stored in ROM is not lost when the power is switched off. Since its contents remain unchanged under normal conditions, ROM is also referred to as static memory. Therefore, Option B (ROM) is the correct answer.


ROM is mainly used to store firmware, which contains essential instructions needed to start and operate the computer. During the boot process, the system reads the firmware stored in ROM to initialize hardware components and begin loading the operating system. Because these instructions are critical for system startup, they must remain available even when the computer is turned off.


Key Point:



  • ROM is a non-volatile memory, meaning it permanently stores essential instructions and retains its contents even after the computer is powered off. In contrast, RAM and Cache are volatile memories that lose their stored data when the power supply is interrupted.

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