Explore topic-wise MCQs in Digital Electronics.

This section includes 106 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Electronics knowledge and support exam preparation. Choose a topic below to get started.

101.

The term "hex inverter" refers to:

A. an inverter that has six inputs
B. six inverters in a single package
C. a six-input symbolic logic device
D. an inverter that has a history of failure
Answer» C. a six-input symbolic logic device
Discussion
102.

TTL operates from a ________.

A. 9-volt supply
B. 3-volt supply
C. 12-volt supply
D. 5-volt supply
Answer» E.
Discussion
103.

If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?

A. 1
B. 2
C. 7
D. 8
Answer» B. 2
Discussion
104.

A truth table illustrates how the input level of a gate responds to all the possible output level combinations.

A. 1
B.
C. 1
D.
Answer» C. 1
Discussion
105.

What is the difference between a 7400 and a 7411 IC?

A. 7400 has two four-input NAND gates; 7411 has three three-input AND gates
B. 7400 has four two-input NAND gates; 7411 has three three-input AND gates
C. 7400 has two four-input AND gates; 7411 has three three-input NAND gates
D. 7400 has four two-input AND gates; 7411 has three three-input NAND gates
Answer» C. 7400 has two four-input AND gates; 7411 has three three-input NAND gates
Discussion
106.

The output of an AND gate with three inputs, A, B, and C, is HIGH when ________.

A. A = 1, B = 1, C = 0
B. A = 0, B = 0, C = 0
C. A = 1, B = 1, C = 1
D. A = 1, B = 0, C = 1
Answer» D. A = 1, B = 0, C = 1
Discussion