Data Path Circuits MCQs

Practice Data Path Circuits MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Digital ElectronicsData Path Circuits

A barrel shifter differs from a simple serial shift register because a barrel shifter can typically?

AShift or rotate a word by multiple bit positions in one combinational operation
BStore data without any logic gates
CConvert analog voltage directly to binary
DRefresh DRAM rows

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Correct Answer: A. Shift or rotate a word by multiple bit positions in one combinational operation

Explanation: A barrel shifter uses combinational selection networks to shift or rotate an entire word by a selected number of positions without requiring one clock per bit position.

Reference: Standard digital electronics: barrel shifter

Question 2

Digital ElectronicsData Path Circuits

Arithmetic right shift of a two’s-complement signed number differs from logical right shift because arithmetic right shift normally?

AReplicates the sign bit into the vacated MSB
BAlways inserts 0 into the MSB
CRotates the LSB into the MSB
DComplements every bit

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Correct Answer: A. Replicates the sign bit into the vacated MSB

Explanation: An arithmetic right shift preserves the sign of a two's-complement value by filling vacated most-significant positions with copies of the sign bit.

Reference: Standard digital electronics: arithmetic shift

Question 3

Digital ElectronicsData Path Circuits

Assuming no overflow and exact divisibility, an arithmetic right shift of a signed two’s-complement integer by one bit approximately corresponds to?

AMultiplication by 2
BDivision by 2
CAddition of 2
DBitwise complement

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Correct Answer: B. Division by 2

Explanation: A one-position arithmetic right shift moves each bit toward lower significance while preserving the sign, corresponding to signed division by 2 under the stated conditions.

Reference: Standard digital electronics: arithmetic shifts