Digital Logic

1: Which of the following statements is wrong ?
A. Propagation delay is the time required for a gate to change its state
B. Noise immunity is the amount of noise which can be applied to the input of a gate without causing the gate to change state
C. Fan-in of a gate is always equal to fan-out of the same gate
D. Operating speed is the maximum frequency at which digital data can be applied to a gate
 

Answer : C

Explanation :

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Option: A

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