When does the output of a NOR gate =0?

A.

whenever 0 is present at input

B.

only when all input =0

C.

whenever 1 is present at input

D.

only when all input =1

Correct answer is C

The NOR gate is a digital logic gate that implements logical NOR - it behaves according to the truth table to the right. A HIGH output (1) results if both the inputs to the gate are LOW (0); if one or both input is HIGH (1), a LOW output (0) results