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ECAT Mathematics Chapter 4 Functions & Groups Online Test MCQs With Answers
Question # 1
N is closed with respect to ordinary
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addition
multiplication
addition and multiplication
division
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Question # 2
Let A and B be two non-empty sets, then any subset of the cartesian product A x B called a
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Function
Domain
Range
Binary relation
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Question # 3
A relation A into B in which Domain is not equal to A, is called
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into function
onto function
None of these
surjective
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Question # 4
Addition is not operation on
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Natural numbers
Even numbers
odd numbers
set of integers
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Question # 5
The set of first elements of the ordered pairs forming the relation is called its
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domain
range
ordered paris
relation
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Question # 6
Function is a special type of
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relation
ordered pairs
Cartesian product
Set
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Question # 7
A function from A to B is called on-to function, if its range is
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A
B
A and B
neither A nor B
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Question # 8
Which of the following represent injuctive function
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Question # 9
If range of a function f is B, then the function is
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surjective
injuctive
bijective
into
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Question # 10
Function is a special type of
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relation
ordered pairs
cartesian product
sets
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Question # 11
If no two elements of ordered pairs of a function from A onto B are the same, then it is called
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surjective
injuctive
bijective
on to
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Question # 12
The set {E,0}, is closed under (ordinary)
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multiplication
addition
subtraction
division
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Question # 13
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bijective function
into function
onto function
surjective
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Question # 14
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similar images
distinct images
similar range
option a and c
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Question # 15
There will be no inverse if the function is
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one -to - one
One to many
onto
into
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Question # 16
If no two elements of ordered pair of a functions from A into B are equal, then it is called.
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Surjective
Injuctive
Bijective
Onto
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Question # 17
If A is non-empty set, any subset of A x A is called a relation in
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A
B
∅
r
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Question # 18
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Question # 19
arb mean
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a is related to b
b is related to a
a is reciprocal of b
a is not related to b
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Question # 20
Extraction of square root of a given number is a
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unary operation
binary operation
group
inverse function
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Question # 21
Such a function which is (1 -1) is called
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surjective
injuctive
bijective
into
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Question # 22
The set of cartesian product A x B consists of
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Domain
Range
Binary relation
Ordered pair
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Question # 23
The set of first elements of the ordered pairs forming the relation is called is
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Domain
Range
Ordered paris
Relation
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Question # 24
A function∫ will have an inverse function if and only if it is a
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onto function
into function
Constant
one-one function
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Question # 25
(a,b) (c,d) if and only if
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a = b and c =d
a = d and b = c
a = c and b = d
a - b = c - d
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