Question

Which of the following logic gates will have an output of '1' (one) for the given inputs?

• A. D
• B. B
• C. A
• D. C

Hint:

Evaluate each gate with its inputs.

Answer 1

The Correct Option is B

Step 1: Use the truth tables:
A NAND gate gives $0$ only when both inputs are $1$. A NOR gate gives $1$ only when both inputs are $0$. An XOR gate gives $1$ only when the inputs differ.

Step 2: Apply:
(A) has both inputs $1$, so $0$. (B) has inputs $1, 0$, so $1$. (C) has one input $1$, so $0$. (D) has equal inputs, so $0$.

Final Answer:
Only gate (B) has output $1$, option (B). \[ \boxed{\text{Gate (B)}} \]