What is the typical access time of a hard disk drive compared to RAM? MCQ with Answer and Explanation

What is the typical access time of a hard disk drive compared to RAM?
A. RAM is slower
B. HDD access time is much slower (milliseconds vs nanoseconds)
C. HDD access time is faster
D. They are similar
Answer: Option B
Solution (By JKSSB Mock Tests)
HDD access times are around 5-10 ms (milliseconds), while RAM access times are around 50-100 ns (nanoseconds), making RAM thousands of times faster.

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Practice More Memory and Storage Devices Questions

Question #1
What is the role of a memory controller in a system with multiple memory channels?
A. To distribute memory accesses across channels for increased bandwidth
B. To combine memory modules into one larger pool
C. To select which channel to use for each access
D. All of the above

Correct Answer: Option D


Explanation:
A memory controller with multiple channels can distribute traffic to increase bandwidth, combine capacities, and select channels based on addressing.

This question belongs to: Computer Memory and Storage Devices
Question #2
What type of memory module architecture includes a specialized hardware register between the memory controller and the DRAM chips to stabilize heavy enterprise server setups?
A. Static SRAM
B. Registered / Buffered RAM
C. Unbuffered RAM
D. Non-volatile Flash Module

Correct Answer: Option B


Explanation:
Registered (or buffered) RAM places an internal register between the system memory controller and the DRAM modules, reducing electrical load and increasing system stability for enterprise server arrays.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the function of a memory mapper?
A. To map memory addresses to physical locations
B. To manage cache
C. To control memory refresh
D. To increase memory speed

Correct Answer: Option A


Explanation:
A memory mapper (like MMU) translates logical addresses to physical addresses, or maps memory regions in systems with limited address space.

This question belongs to: Computer Memory and Storage Devices