Question 97

Computer Awareness Microprocessor and Microcontroller Easy

Which is not characteristic of a shift register?

(A) Serial in/parallel in
(B) Serial in/ parallel out
(C) Parallel in / serial out
(D) Parallel in / Parallel out
✓ Correct Answer: Option A Verified Solution

📘 Step-by-Step Solution & Detailed Explanation:

Shift registers are classified by how data enters and leaves them:

  • Serial In – Serial Out (SISO)
  • Serial In – Parallel Out (SIPO)
  • Parallel In – Serial Out (PISO)
  • Parallel In – Parallel Out (PIPO)

"Serial in / parallel in" doesn't make sense (data can't come in both ways at once), so it is not a type of shift register.

Answer: (A)

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