Which of the following is an example of secondary memory?

Which of the following is an example of secondary memory?

• A. Hard Drive
• B. Central Processing Unit
• C. Cache Memory
• D. Random Access Memory

Answer: (A)

The main idea here is the difference between primary memory and secondary storage. Secondary memory is non-volatile storage used to keep data and programs long-term, even when the computer is turned off. It’s slower to access than primary memory but holds everything permanently or for extended periods. A hard drive fits this role because it stores the operating system, applications, and files persistently. In contrast, primary memory, such as cache memory and RAM, is fast and directly accessible by the CPU, but it is usually volatile—its contents disappear when power is lost. The central processing unit itself is the processor, not memory, so it doesn’t count as secondary storage. So the hard drive is the example of secondary memory, while cache memory and RAM are primary memory, and the CPU is the processor.

The main idea here is the difference between primary memory and secondary storage. Secondary memory is non-volatile storage used to keep data and programs long-term, even when the computer is turned off. It’s slower to access than primary memory but holds everything permanently or for extended periods. A hard drive fits this role because it stores the operating system, applications, and files persistently.

In contrast, primary memory, such as cache memory and RAM, is fast and directly accessible by the CPU, but it is usually volatile—its contents disappear when power is lost. The central processing unit itself is the processor, not memory, so it doesn’t count as secondary storage.

So the hard drive is the example of secondary memory, while cache memory and RAM are primary memory, and the CPU is the processor.