Question

Two different logic gates giving output '0' for the inputs (0, 1) and then for (1, 0) are

• A. 'AND', 'NAND'
• B. 'NAND', 'NOR'
• C. 'OR', 'AND'
• D. 'NOR', 'AND'

Hint:

An easy way to check is remembering that both AND and NOR gates are highly restrictive. Mismatched inputs like $(0,1)$ fail the high conditions of both gates, dropping their outputs to '0' simultaneously!

Answer 1

The Correct Option is D

Step 1: Test the AND gate.
An AND gate gives 1 only when both inputs are 1. For inputs $(0,1)$ and $(1,0)$, it gives 0 both times.

Step 2: Test the NOR gate.
A NOR gate gives 1 only when both inputs are 0. Since both $(0,1)$ and $(1,0)$ contain a 1, the output is 0 both times.

Step 3: Pick the pair.
Both AND and NOR give 0 for these inputs. \[ \boxed{\text{NOR and AND}} \]