Explore topic-wise MCQs in Discrete Mathematics.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Discrete Mathematics knowledge and support exam preparation. Choose a topic below to get started.

1.

For matrix A, B if A B = O, where O is a null matrix then?

A. A = O
B. B = O
C. A = B
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
2.

For matrix A, B.(A+B)T = AT + BT and (AB)T = ATBT if the orders of matrices are appropriate.

A. True
B. False
Answer» C.
Discussion
3.

If for a square matrix A, A2 = A then such a matrix is known as _________

A. Idempotent matrix
B. Orthagonal matrix
C. Null matrix
D. None of the mentioned
Answer» B. Orthagonal matrix
Discussion
4.

Let A=[aij ] be an mxn matrix and k be a scalar then kA is equal to __________

A. [ka<sub>ij</sub> ]<sub>mxn</sub>
B. [a<sub>ij</sub>/k ]<sub>mxn</sub>
C. [k<sup>2</sup> a<sub>ij</sub>]<sub>mxn</sub>
D. None of the mentioned
Answer» B. [a<sub>ij</sub>/k ]<sub>mxn</sub>
Discussion
5.

Let A order(axb) and Border(cxd) be two matrices, then if AB exists, the order of AB is?

A. axd
B. bxc
C. axb
D. cxd
Answer» B. bxc
Discussion
6.

Let A order(axb) and Border(cxd) be two matrices, then for AB to exist, correct relation is given by?

A. a = d
B. b = c
C. a = b
D. c = d
Answer» C. a = b
Discussion