Question

For a two input logic gate, when the inputs are 'zero' and 'zero' the output is 'one'. When the inputs are 'one' and 'zero' the output is 'zero'. The type of logic gate is

• A. NAND
• B. OR
• C. NOR
• D. XOR

Hint:

Check the given rows against the truth tables of NAND, OR, NOR and XOR.

Answer 1

The Correct Option is C

Step 1: Use the First Row:
Output 1 for inputs 0, 0 removes OR and XOR, which both give 0 there.

Step 2: Use the Second Row:
Output 0 for inputs 1, 0 removes NAND, which gives 1 whenever any input is 0.

Step 3: Answer:
Only NOR remains. Option (C).

Final Answer:
Option (C). \[ \boxed{\text{(C) NOR}} \]