Computer Fundamentals Questions and Answers – Fundamental Concepts & Postulates


This set of Computer Fundamentals Questions and Answers for Experienced people focuses on “Fundamental Concepts & Postulates”.

1. The number of values applicable in Boolean Algebra.
a) 1
b) 2
c) 3
d) 4
View Answer

Answer: b
Explanation: Boolean algebra is based on binary number system. It therefore comprises only 2 bits : 0 and 1. Hence, only two values are applicable to Boolean algebra.

2. Boolean Algebra can deal with any number system.
a) True
b) False
View Answer

Answer: b
Explanation: Boolean Algebra can only be used with the binary number system. Boolean deals with only two values 0 and 1. In Boolean System, if the result is tautology it returns 1 otherwise 0.

3. The symbol + in Boolean is also known as the ____________ operator.
a) AND
b) OR
c) ADD
View Answer

Answer: b
Explanation: The symbol + is also called as the OR operator. It is used for logical addition. It follows the law of binary addition.

4. Which operator has the highest precedence?
a) +
b) .
c) !
d) *
View Answer

Answer: c
Explanation: The NOT operator has the highest precedence. It is denoted by ! or – sign. Further, AND (.) operations are performed and then the OR terms are evaluated.

5. In the expression Y + X’.Y, which operator will be evaluated first?
a) ‘
b) +
c) .
d) ,
View Answer

Answer: a
Explanation: In Boolean Algebra, complement of a number is given the highest precedence. Therefore, complement which is denoted by the ‘ (apostrophe) symbol is evaluated first.
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6. Which of the following is false?
a) x+y=y+x
b) x.y=y.x
c) x.x’=1
d) x+x’=1
View Answer

Answer: c
Explanation: The first and second option describes the commutative law. The fourth option holds true since if x=1, then x’=0, and x+x’=1. Third option is incorrect because on multiplication of a boolean value with its complement the result will always be 0.

7. As per idempotent law, X + X will always be equal to ________
a) 0
b) 1
c) X
d) 2X
View Answer

Answer: c
Explanation: It will always return the same value X. Since, boolean deals with only two numbers 0 and 1, if we add 0+0, the answer is 0. Similarly, if we add 1+1 the answer is 1.

8. The expression for involution law is _________
a) x+y=y+x
b) x+1=1
c) (x’)’=x
d) x.x=x
View Answer

Answer: c
Explanation: The involution law states that the complement of complement of a number is the number itself. The third option justifies the statement. Thus, (x’)’=x.

9. Who proposed the use of Boolean algebra in the design of relay switching circuits?
a) George Boole
b) Claude E. Shannon
c) Claude E. Boole
d) George Shannon
View Answer

Answer: b
Explanation: Claude E Shannon suggested the use of Boolean in relay switching circuits. George Boole, a mathematician introduced it for simplifying representations and manipulation of propositional logic.

10. Truth table is used to represent Boolean __________
a) functions
b) algebra
c) operators
d) addition
View Answer

Answer: a
Explanation: The Boolean functions are represented using the truth tables. Truth tables represent the tautology and fallacy for terms.

Sanfoundry Global Education & Learning Series – Computer Fundamentals.

To practice all areas of Computer Fundamentals for Experienced people, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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