Question

Arrange the following memory hierarchy from fastest to slowest: A. RAM, B. SSD, C. HDD, D. Register, E. Cache.

• A. A, B, D, C, E
• B. A, B, D, E, C
• C. D, E, A, B, C
• D. E, D, C, A, B

Hint:

Memory speed order: Register \(>\) Cache \(>\) RAM \(>\) SSD \(>\) HDD.

Answer 1

The Correct Option is C

Concept:
Memory hierarchy arranges storage devices according to speed, cost, and closeness to the CPU.

Step 1: Fastest memory.
Registers are inside the CPU and are the fastest. \[ \text{First} = D \]

Step 2: Cache memory.
Cache memory is very fast and stores frequently used data near the CPU. \[ \text{Second} = E \]

Step 3: RAM.
RAM is slower than cache but much faster than secondary storage. \[ \text{Third} = A \]

Step 4: SSD and HDD.
SSD is faster than HDD because it has no moving mechanical parts. HDD is slowest among these. \[ \text{Fourth} = B \] \[ \text{Fifth} = C \] Therefore, the correct order is: \[ D,\ E,\ A,\ B,\ C \] \[ \therefore \text{Correct Answer is (C)} \]