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Logic Gates - Technical MCQs

Q1:

If a 3-input AND gate has eight input possibilities, how many of those possibilities will result in a HIGH output?

A 1

B 2

C 7

D 8

ANS:A - 1

For 3-input AND Gate: The output Y = A * B * C

A B C Y
0 0 0 0
0 0 1 0
0 1 0 0
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 0
1 1 1 1 <== On this case only the output will be HIGH.

Therefore, the answer is 1 possibility.