GATE EC 2015 Set 1 — Question 24

MCQ+1 / -0.33EasyALU & Data PathComputer OrganizationDigital Circuits

Digital Circuits → Computer Organization → ALU & Data Path

Last updated 5 September 2026

Question

In an 8085 microprocessor, the shift registers which store the result of an addition and the overflow bit are, respectively

Correct answer (B) A and F Solution In the 8085 microprocessor architecture: 1. The Accumulator (Register A) is the primary register used for arithmetic and logical operations. The result of an addition is automatically stored in the Accumulator. 2. The Flag Register (Register F) contains status bits that reflect the results of the last arithmetic or logical operation. The 'Carry' flag (CY) in the Flag register acts as the overflow bit for unsigned addition. Therefore, the result is in A and the overflow status is in F. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (B) A and F Solution In the 8085 microprocessor architecture: 1. The Accumulator (Register A) is the primary register used for arithmetic and logical operations. The result of an addition is automatically stored in the Accumulator. 2. The Flag Register (Register F) contains status bits that reflect the results of the last arithmetic or logical operation. The 'Carry' flag (CY) in the Flag register acts as the overflow bit for unsigned addition. Therefore, the result is in A and the overflow status is in F.

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