Test: Boolean Algebra & Logic Gates- 1

QUESTION: 1

Which of the following boolean algebra statements represent distributive law?

A.
(A + B) + C = A + ( B + C)
B.
A . (B + C) = (A . B) + (A . C)
C.
A . (B . C) = (A . B) . C
D.
None of these

Solution:

QUESTION: 2

Which of the foliowing boolean algebra statements represent commutative law?

A.
(A + B) + C = A(B + C)
B.
A . {B + C) = {A . B) + (A . C)
C.
A + B = B + A
D.
A + A = A

Solution:

QUESTION: 3

Which of the following logic expression is incorrect?

A.
B.
C.
D.

Solution:

The expression:

Hence, (b) is the correct option.

QUESTION: 4

Let X and Y be the input and Z be the output of a AND gate. The value of Z is given by

A.
X + Y
B.
X - Y
C.
D.

Solution:

QUESTION: 5

What logic gate is represented by the circuit shown below:

A.
NAND
B.
NOR
C.
AND
D.
EQUIVALENCE

Solution:

QUESTION: 6

The boolean expression A + BC equals

A.
B.
(A + B ) ( A + C )
C.
D.
None of these

Solution:

A + BC represents the distributive law which can be expanded as A + BC = (A + B) . (A + C)

QUESTION: 7

A positive AND gate is also a negative

A.
NAND gate
B.
OR gate
C.
AND gate
D.
NOR gate

Solution:

QUESTION: 8

A gate in which all inputs must be low to get a high output is called a/an

A.
Inverter
B.
NOR gate
C.
AND gate .
D.
NAND gate

Solution:

QUESTION: 9

Logic 1 in +ve logic system is represented by

A.
Zero level
B.
Lower voltage level
C.
Higher voltage level
D.
Negative voltage

Solution:

QUESTION: 10

An AND circuit

A.
Is a memory CKT
B.
Gives an output when all input signals are present simultaneously
C.
is a -ve OR gate
D.
is a linear CKT

Solution:

10 Questions MCQ Test Question Bank for GATE Computer Science Engineering | Test: Boolean Algebra & Logic Gates- 1

Which of the following boolean algebra statements represent distributive law?

Which of the foliowing boolean algebra statements represent commutative law?

Which of the following logic expression is incorrect?

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