Question

In which logic gate the output state is usually the complement of the input state?

(a) NOT gate

(b) NOR gate

(c) X-NOR gate

(d) OR gate

I had been asked this question during a job interview.

The question is from Boolean Algebra topic in section Boolean Algebra and Modeling Computations of Discrete Mathematics

Answer 1

The correct choice is (a) NOT gate

To explain: NOT gate is the simplest digital logic circuit which is also called an inverter because it takes the input in 0 or 1 form and gives the output as the complement of the input.