Which of the following represents the correct order of memory types from fastest to slowest in a typical computer system?

Options

  • A. HDD, SSD, RAM, Cache, Registers
  • B. Registers, Cache, RAM, SSD, HDD
  • C. Cache, HDD, Registers, RAM, SSD
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. Registers, Cache, RAM, SSD, HDD

Detailed Explanation

Correct Answer: Registers, Cache, RAM, SSD, HDD.

Explanation: In a typical memory hierarchy, CPU registers are the fastest, followed by cache, main memory (RAM), SSD storage and HDD storage. Moving down the hierarchy generally increases access latency and storage capacity while reducing cost per bit. Exact performance varies by hardware.
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BPSC TRE 4 operating system practice set 3

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