Explore topic-wise MCQs in Digital Circuits.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

If minuend = 0, subtrahend = 1 and borrow input = 1 in a full subtractor then the borrow output will be __________

A. 0
B. 1
C. Floating
D. High Impedance
Answer» C. Floating
Discussion
2.

In serial addition, the addition is carried out __________

A. 3 bit per second
B. Byte by byte
C. Bit by bit
D. All bits at the same time
Answer» D. All bits at the same time
Discussion
3.

How many NOT gates are required to implement the Boolean expression: X = AB C + A BC?

A. 2
B. 3
C. 4
D. 5
Answer» B. 3
Discussion
4.

One positive pulse with tw = 75 s is applied to one of the inputs of an exclusive-OR circuit. A second positive pulse with tw = 15 s is applied to the other input beginning 20 s after the leading edge of the first pulse. Which statement describes the output s relation with the inputs?

A. The exclusive-OR output is a 20 s pulse followed by a 40 s pulse, with a separation of 15 s between the pulses
B. The exclusive-OR output is a 20 s pulse followed by a 15 s pulse, with a separation of 40 s between the pulses
C. The exclusive-OR output is a 15 s pulse followed by a 40 s pulse
D. The exclusive-OR output is a 20 s pulse followed by a 15 s pulse, followed by a 40 s pulse
Answer» E.
Discussion