Digital Design MCQs

Question 1

Why should a LED be pulled LOW from a logic gate rather than pulled HIGH?

Accepted Answer

LOW-level current is larger.

Answer

LOW-level current is smaller.

Answer

HIGH-level current is larger.

Answer

LOW-level current is smaller and HIGH-level current is larger.

Question 2

What is the major advantage of the J-K flip-flop over the S-R flip-flop?

Accepted Answer

The J-K flip-flop has a toggle state.

Answer

The J-K flip-flop is much faster.

Answer

The J-K flip-flop does not have propagation delay problems.

Answer

The J-K flip-flop has two outputs.

Question 3

One example for the use of a Schmitt trigger is as a(n):

Accepted Answer

switch debouncer

Answer

racer

Answer

astable oscillator

Answer

transition pulse generator