The GATE Grind

GATE 2025 PH – Question 19

Electronics · basics of digital logic circuits, combinational and sequential circuits, flip- flops, timers, counters, registers, A/D and D/A conversion. · 1 mark · Multiple choice

A logic gate circuit is shown in the figure below. The correct combination for the input (P, Q) for which the output T= 1 is

NOR and AND gates with inputs P and Q.
  1. (0,0)
  2. (0,1)
  3. (1,1)
  4. (1,0)

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Correct answer: (A) (0,0)

Explanation

The NOR output is one only when both P and Q are zero. The additional inverted-Q input to the AND gate is then also one.