Top 150+ Solved Discrete Structure (DS) MCQ Questions Answer
Q. Let A={2,{4,5},4} Which statement is correct?
a. 5 is an element of A.
b. {5} is an element of A.
c. {4, 5} is an element of A.
d. {5} is a subset of A.
Q. Which of these sets is finite?
a. {x | x is even}
b. ) {1, 2, 3,...}
c. {1, 2,3,...,999,1000}
d. none
Q. Which of these sets is not a null set?
a. A = {x | 6x = 24 and 3x = 1}
b. B = {x | x + 10= 10}
c. C = {x | x is a man older than 200 years}
d. D = {x | x < x}
Q. Let A = {x, y, z}, B = {v, w, x}. Which of the following statements is correct?
a. A U B ={v, w,x, y, z}
b. A U B = {v, w,y, z}
c. A U B = {v,w, x, y}
d. A U B ={x,w, x, y, z}
Q. which sets are equal ? 1.{r,s,t} 2.{s,s,t,r} 3.{t,r,t,s}
a. 1 and 2
b. 2 and 3
c. 1 and 3
d. all are equal
Q. A U A=A according to …….law
a. Associative law
b. commutative law
c. Indempotent law
d. distributive law
Q. In any application of the theory of sets, the members of all the sets belongs to …… set
a. union
b. intersection
c. universal
d. cardinal
Q. Multiset is an unordered collection of elemnts where an element can occur a a member more than once
a. TRUE
b. FALSE
c. Both
d. None
Q. one of the A or B is uncountably infinite and one is countably infinite then | AUB| will be
a. countably infinite
b. uncountably finite
c. countably finite
d. uncountably infinite