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A 4-bit shift register that receives 4 bits of parallel data will shift to the ________ by ________ position for each clock pulse.

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Answer & Explanation
Correct AnswerA. Right, one

Quick Explanation

A 4-bit shift register loaded in parallel still shifts one bit position for each clock pulse once placed in shift mode. Under the convention used in the question, it shifts one position to the right per clock.

Formula / Key Relation

1 clock pulse = 1 stage shift

Detailed Explanation

Concept & Reasoning

Parallel loading determines how the initial 4-bit word enters; it does not mean four positions shift at once. During serial shift operation, every active clock moves each stored bit to the adjacent stage by one position. Direction is set by the register configuration/control input.

How to Solve It in the Exam

Parallel load ≠ parallel shift.

Important Exam Point

Read the direction stated/assumed by the device before tracing bits.

Related Revision Path

This question sits in the revision path Digital Electronics → Sequential Logic → Shift Registers .

Parallel-Load Shift Register explanatory diagram

Quick Trick

Parallel load ≠ parallel shift.

Common Mistake

Thinking four parallel-loaded bits shift four positions in one clock.

Exam Tip

Read the direction stated/assumed by the device before tracing bits.

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Previous Exam Appearances

Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 164

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