MCQs of Digital (Basic Electronics - 3110016)

Basic Electronics (3110016) MCQs

MCQs of Digital

Showing 21 to 20 out of 30 Questions

21.

Which of the following is true as per De Morgan's law (i)

(A + B) = \bar{A} + \bar{B}

(ii)

(A + B) = \bar{A} \cdot \bar{B}

(iii)

(A + B) = A \cdot B

(a)	(i)
(b)	(ii)
(c)	(iiI)
(d)	None of the above

22.

How many AND gates are required to realize output Y= f(C,D,E,F,G) = CD + EF + G?

(a)	5
(b)	4
(c)	3
(d)	2

23.

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)	5
(d)	7

24.

In a three input gate if one of the input is made low, the output remains high irrespective of logic level of other inputs. The gate can be best described as ___________ .

(a)	AND
(b)	OR
(c)	NAND
(d)	NOR

25.

Which from the following two input gate is also know as equality gate.

(a)	NAND
(b)	NOR
(c)	XOR
(d)	XNOR

26.

The expression

A (A + B)

is equivalent to _____

(a)	A+B
(b)	AB
(c)	B
(d)	A

27.

The expression

(A + B) (\bar{A} \cdot \bar{B})

is equivalent to

(a)	1
(b)	0
(c)	AB
(d)	$A \cdot \bar{B}$

28.

A single transistor can be used to build which of the following digital logic gates?

(a)	AND
(b)	OR
(c)	NOT
(d)	NAND

29.

How many truth table entries are necessary for a four-input circuit?

(a)	4
(b)	8
(c)	12
(d)	16

30.

Typically IC 7400 contains _______ .

(a)	4 NOR gates
(b)	4 NAND gates
(c)	4 OR gates
(d)	4 AND gates

Showing 21 to 20 out of 30 Questions