Which of the following statements correctly distinguishes main memory from secondary memory?

Options

  • A. RAM retains its contents after power is switched off
  • B. Secondary memory normally retains data without continuous power
  • C. All main memory is non-volatile
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. Secondary memory normally retains data without continuous power

Detailed Explanation

Correct Answer: Secondary memory normally retains data without continuous power.

Explanation: Main memory usually refers to RAM, which is volatile and loses its contents when power is removed. Secondary storage devices such as HDDs and SSDs are non-volatile and retain data without continuous power. ROM is an example of non-volatile primary memory, so not all primary memory is volatile.
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BPSC TRE 4 operating system practice set 3

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