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ECAT Pre General Science Mathematics Chapter 5 Matrics and Determinants Online Test MCQs With Answers
Question # 1
System of linear equations is inconsistent if
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System has no solution
System has one solution
System has two solution
None of above
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Question # 2
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Square matrix
Row matrix
Symmetric matrix
Null matrix
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Question # 3
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0
1
2
3
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Question # 4
The matrix A = [aij]mxn with m ≠n is always
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Symmetric
Hermition
Skew-symmetric
None
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Question # 5
If A = [aij]mxpand B =[aij]pxnthen order of BA is
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m x n
p x n
n x m
None of these
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Question # 6
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Question # 7
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1
-1
0
I
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Question # 8
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Zero matrix
Diagonal matrix
Column matrix
Scalar matrix
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Question # 9
A square matrix A = [aij] is upper triangular when
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cij = 0
bij = 0
aij = 0 for all i > j
dij = 0
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Question # 10
If A and B are two matrices such that AB = B and BA = A then A2 + B2 =
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2 AB
2 BA
A + B
AB
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Question # 11
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Question # 12
A square matrix A = [aij] is lower triangular matrix when:
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aij = 0 for all i < j
bij = 0
cij = 0
dij =0
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Question # 13
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Question # 14
Let A is a 3 x 3 matrix and B is its adjoint matrix. If |B| = 64, then |A| =
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Question # 15
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Question # 16
Which of the following is skew symmetric matrix
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Question # 17
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2s
2
2s
3
s
3
3s
3
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Question # 18
If there are m rows and n columns in a matrix then its order is
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m x n
m x m
n x n
n x m
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Question # 19
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Question # 20
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Question # 21
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Question # 22
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Question # 23
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Orthogonal
Involutary
Idempotent
Nilpotent
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Question # 24
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Question # 25
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x =0, y =4
x = -1, y = 2
x = 2, y = 3
x = 3, y = 4
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Question # 26
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1
0
-1
2
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Question # 27
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16
None of these
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Question # 28
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4A - 3I
3A - 4I
A - I
None of these
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Question # 29
We also the system of non-homogeneous linear equations by
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a and b
b and c
c and a
a, b and c
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Question # 30
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2
4
6
8
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