Question

NAND gate means

• A. Inversion followed by AND gates
• B. AND gates followed by an inverter
• C. AND gate followed by OR gate
• D. None of these

Hint:

Remember: NAND = AND + NOT. The output is low only when all inputs are high.

Answer 1

The Correct Option is B

A NAND gate is a combination of an AND gate followed by a NOT gate (inverter).
The NAND (Not AND) gate gives an output that is the inverse of the output of an AND gate.
Mathematically: \[ A \, \text{NAND} \, B = \overline{A \cdot B} \] So, first the inputs are passed through an AND gate and the result is then inverted.