MCQOPTIONS

Explore topic-wise MCQs in Digital Circuits.

This section includes 9 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 enable input is high then the multiplexer is ______________
A.	Enable
B.	Disable
C.	Saturation
D.	High Impedance
Answer» C. Saturation

2.	The inputs/outputs of an analog multiplexer/demultiplexer are ____________
A.	Bidirectional
B.	Unidirectional
C.	Even parity
D.	Binary-coded decimal
Answer» B. Unidirectional

3.	One multiplexer can take the place of ____________
A.	Several SSI logic gates
B.	Combinational logic circuits
C.	Several Ex-NOR gates
D.	Several SSI logic gates or combinational logic circuits
Answer» E.

4.	A basic multiplexer principle can be demonstrated through the use of a ____________
A.	Single-pole relay
B.	DPDT switch
C.	Rotary switch
D.	Linear stepper
Answer» D. Linear stepper

5.	Without any additional circuitry an 8:1 MUX can be used to obtain ____________
A.	Some but not all Boolean functions of 3 variables
B.	All function of 3 variables but none of 4 variables
C.	All functions of 3 variables and some but not all of 4 variables
D.	All functions of 4 variables
Answer» E.

6.	A combinational circuit is one in which the output depends on the ____________
A.	Input combination at the time
B.	Input combination and the previous output
C.	Input combination at that time and the previous input combination
D.	Present output and the previous output
Answer» B. Input combination and the previous output

7.	A combinational circuit that selects one from many inputs are ____________
A.	Encoder
B.	Decoder
C.	Demultiplexer
D.	Multiplexer
Answer» E.

8.	The two input MUX would have ____________
A.	1 select line
B.	2 select lines
C.	4 select lines
D.	3 select lines
Answer» B. 2 select lines

9.	4 to 1 MUX would have ____________
A.	2 inputs
B.	3 inputs
C.	4 inputs
D.	5 inputs
Answer» D. 5 inputs