Download PDF
Free download in PDF Matrices Multiple Choice Questions & Answers for competitive exams. These Matrices Objective Questions with Answers are important for competitive exams UGC NET, GATE, IBPS Specialist Recruitment Test.
(1)
If the order of matrix A is m×p. And the order of B is p×n. Then the order of matrix AB is ?
[A]
n × p
[B]
m × n
[C]
n × p
[D]
n × m
(2)
Transpose of a rectangular matrix is a
[A]
rectangular matrix
[B]
diagonal matrix
[C]
square matrix
[D]
scaler matrix
Answer: Rectangular matrix
(3)
A square matrix in which all elements except at least one element in diagonal are zeros is said to be a
[A]
identical matrix
[B]
null/zero matrix
[C]
column matrix
[D]
diagonal matrix
(4)
In matrices, columns are denoted by
(5)
In matrices (AB)−1 equals to
[A]
A−1
[B]
B−1
[C]
A−1 B−1
[D]
B - 1 A - 1
(6)
For a non-trivial solution | A | is
[A]
|A| > 0
[B]
|A| < 0
[C]
|A| ≠ 0
[D]
|A| = 0
(7)
The number of non-zero rows in an echlon form is called ?
[A]
rank of a matrix
[B]
cofactor of the matrix
[C]
reduced echlon form
[D]
conjugate of the matrix
(8)
Two matrices A and B are multiplied to get AB if
[A]
both are rectangular
[B]
both have same order
[C]
No. of column of matrix A is equals to no. of Rows of B
[D]
no of rows of A is equal to no of columns of B
Answer: No. of column of matrix A is equals to no. of Rows of B
(9)
Transpose of a row matrix is
[A]
zero matrix
[B]
diagonal matrix
[C]
column matrix
[D]
row matrix
(10)
Idea of matrices was introduced by Arthur Caylet in
[A]
18th century
[B]
19th century
[C]
20th century
[D]
21st century
(11)
If A(BC) = (AB)C, then with respect to multilpication this law is called
[A]
Inverse law
[B]
associative law
[C]
cramers law
[D]
additive law
(12)
In real numbers, additive identity is
(13)
Matrices obtained by changing rows and columns is called
[A]
rectangular matrix
[B]
transpose
[C]
symetric
[D]
None of Above
(14)
Additive inverse of a matrix A is
[A]
adj A⁄|A|
[B]
A²
[C]
|A|
[D]
A
(15)
Two matrices A and B are multiplied to get AB if
[A]
both are rectangular
[B]
both have same order
[C]
no of columns of A is equal to columns of B
[D]
no of rows of A is equal to no of columns of B
Answer: No of columns of A is equal to columns of B
(16)
If A and B are matrices, then which from the following is true ?
[A]
AB ≠ BA
[B]
(At)t ≠ A
[C]
A + B ≠ B + A
[D]
all are true
(17)
If A is a symmetric matrix, then At =
[A]
0
[B]
A
[C]
|A|
[D]
diagonal matrix
(18)
If |A| = 0, then A is
[A]
zero matrix
[B]
singular matrix
[C]
non-singular matrix
[D]
0
(19)
Two matrices A and B are added if
[A]
both are rectangular
[B]
both have same order
[C]
no of columns of A is equal to columns of B
[D]
no of rows of A is equal to no of columns of B
Answer: both have same order
(20)
A square or a rectangular array of numbers written within square brackets in a definite order in rows and columns is known as
[A]
formula
[B]
determinant
[C]
matrix
[D]
equation
Take Mock Tests