# Class 9 Computer Science Chapter 6 Boolean Algebra MCQ Questions with Answer

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## Boolean Algebra Class 9 MCQ Questions with Answer

Class 9 Computer Science MCQ with answers are given here to Chapter 6 Boolean Algebra. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 9 Computer Science syllabus. By Solving these Class 9 MCQs, you will be able to analyze all of the concepts quickly in the Chapter and get ready for the Class 9 Annual exam.

Learn Boolean Algebra Class 9 MCQ with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 9 Boolean Algebra MCQ with answers given below.

Question 1. A+0 is equal to————————–
(a).A
(b).0
(c).A0
(d).0A

A

Question 2. 0 is called the ————————–
(a).no identity
(b).multiplication identity
(c). Division identity

D

Question 3. Demorgan‟s law states that
(a).a(b+c)=a.b+a.c
(b).a+(b+c)=(a+b)+c
(c). a b a.b
(d).none of the above

C

Question 4. A Boolean function with four variables will have——–
(a).8 maxterms
(b). 16 maxterms
(c). 24 maxterms
(d). 32 maxterms

B

Question 5. x+x is equal to
(a).2x
(b).x
(c).x^2
(d).x2

B

Question 6. ————– is very efficient way of solving Boolean functions.
(a).karnaugh map
(b).Boolean algebra
(c).Boolean variables
(d).Boolean constant

A

Question 7. The complement of addition of two numbers is equal to the product of their complements is the statement of ——law
(a).idempotent law
(b).Demorgan law
(c). absorption law
(d). not a law

B

Question 8. 0 and 1 are called the —————-
(a).Boolean variable
(b).Boolean expression
(c).Boolean constant
(d).all of the above

C

Question 9. x.y is equal to——————
(a). x + y
(b). x.y
(c). x.y
(d). (x+y)(x+y)

A

Question 10. in Boolean algebra standard product is called——————–
(a).maxterm
(b).product term
(c).minterm
(d). Boolean term

C

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Question 11. The principal of duality states that —-and—–are interchangeable
(a). . and +
(b). – and +
(c). / and +
(d). + and /

A

Question 12. as the number of variables in Boolean increases, the k-map becomes
(a).more simple
(b).more easy
(c). More complex
(d).much easy

C

Question 13. in Boolean algebra standard sum is called——————–
(a).maxterm
(b).product term
(c).minterm
(d). Boolean term

A

Question 14. k-map is used to————–
(a).evaluate a Boolean expression
(b).simplify a Boolean expression
(c).both a and b
(d).make truth table

C

Question 15. commutative law states that a+b is equal to——————-
(a).b+a
(b).b-a
(c).b.a
(d).a.b

A

Question 16. by distributive law we know that ab+ac is equal to—————-
(a).a(b-c)
(b).a(b+c)
(c).a+(b.c)
(d).a(b/c)

B

Question 17. Boolean algebra operates on————————
(a).decimal numbers
(b).binary numbers
(c).octal numbers
(d).hexa numbers

B

Question 18. In Boolean algebra identity elements with respect to dot (.) is ————–
(a).1
(b).0
(c).10
(d).2

A

Question 19. the idempotent law states that for two variables x and y
(a).x+x.y=x+y
(b).x^^= x
(c).x.x=x
(d).none of the above

C

Question 20. the absorption law states that for two variables x and y
(a).x.x=x and y.y=y
(b).x.y^=y^.x
(c).x+x.y=x.y
(d).none of the above