CBSE Class 9 Computer Science Boolean Algebra MCQs

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

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

Question: A+0 is equal to————————–
a) A
b) 0
c) A0
d) 0A
Answer: a

Question: in Boolean algebra standard product is called——————–
a) maxterm
b) product term
c) minterm
d) Boolean term
Answer: c

Question: 0 is called the ————————–
a) no identity
b) multiplication identity
c) Division identity
d) additive identity
Answer: d

Question: x+x is equal to
a) 2x
b) x
c) x^2
d) x2
Answer: b

Question: as te number of variables in Boolean increases, the k-map becomes
a) more simplhe
b) more easy
c) More complex
d) much easy
Answer: c

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

Question: in Boolean algebra standard sum is called——————–
a) maxterm
b) product term
c) minterm
d) Boolean term
Answer: a

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

Question: 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 options
Answer: c

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

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

Question: Boolean algebra operates on————————
a) decimal numbers
b) binary numbers
c) octal numbers
d) hexa numbers
Answer: b

Question: 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
Answer: b

Question: 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)
Answer: b

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

Question: 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 options
Answer: c

Question: 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 options
Answer: c

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