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Identify the correct logic gate for the following output (Y) of two inputs A and B. [Figure: seven equal intervals. A: 0, 0, 1, 1, 0, 0, 1. B: 0, 1, 0, 1, 0, 1, 0. Output Y: 1, 1, 1, 0, 1, 1, 1. Options: (a) OR gate followed by NOT; (b) AND gate followed by NOT; (c) OR gate followed by NOT; (d) AND gate with B inverted at its input.]

Asked in JEE Main 27th June 1st Shift 2022 · Waveforms, switches and diode gates

• (1) OR followed by NOT
• (2) AND followed by NOT
• (3) OR followed by NOT (drawn again)
• (4) AND with B as one input

Step-by-step solution

Why the other options are wrong

• (1) NOR would give 0 whenever either input is 1.
• (3) NOR would give 0 whenever either input is 1.
• (4) AB would be 0 in interval 2, where Y=1.

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