question_answer

If a, b, c, d are inputs to a gate and x is its output, then as per the following time graph, the gate is                [JEE MAIN - I 3-4-2016]

[d]

[c]

[b]

[a]

(x)

A) NAND

B) NOT

C) AND

D) OR

Correct Answer: D

Solution :

[d] Output of OR gate is 0 when all inputs are 0 & output is 1 when at least one of the input is 1. Observing output x:- It is 0 when all inputs are 0 & it is 1 when at least one of the inputs is 1. OR gate