ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 4 (Functions and Groups)

• injuctive as well as surjective A
• both onto and into B
• one - one and into C
• only (1 - 1) D

The extraction of a cube root of a given number is a

• Binary operation A
• Unary operation B
• group C
• multiplicative inverse D

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following represent injuctive function

• 
  A
• 
  B
• 
  C
• 
  D

The set of first elements of the ordered pairs forming the relation is called is

• Domain A
• Range B
• Ordered paris C
• Relation D

Which of the following notation defines AxB

• 
  A
• 
  B
• 
  C
• 
  D

The set of cartesian product A x B consists of

• Domain A
• Range B
• Binary relation C
• Ordered pair D

A function f from A to B can be written as

• 
  A
• 
  B
• 
  C
• 
  D

A relation a into B in which Domain is not equal to a, is called.

• Into function A
• on to function B
• None of these C
• Surjective D

The identity function is

• surjective A
• injuctive B
• bijective C
• into D

The net of cartesian product AxB consists of

• domain A
• range B
• binary relation C
• ordered pair D

Which of the following diagrams represent into function?

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following diagrams represent bijective function?

• 
  A
• 
  B
• 
  C
• 
  D

The inverse of a line is

• inverse A
• Line B
• quadratic C
• Circle D

The function denoted by 1/f called the

• Reciprocal function A
• Inverse function B
• Constant function C
• Reverse function D

Function is a special type of

• relation A
• ordered pairs B
• Cartesian product C
• Set D

If A is non-empty set, any subset of AxA is called a relation in a

• A A
• B B
• D C
• r D

If the number of elements in set A is n, and in set B is m, then the number of elements in AxB will

• n^m A
• mⁿ B
• m x n C
• m + n D

• similar images A
• distinct images B
• similar range C
• option a and c D

The set {E,0}, is closed under (ordinary)

• multiplication A
• addition B
• subtraction C
• division D

Function is a special type of

• relation A
• ordered pairs B
• cartesian product C
• sets D

A relation A into B in which Domain is not equal to A, is called

• into function A
• onto function B
• None of these C
• surjective D

The set of first elements of the ordered pairs forming the relation is called its

• domain A
• range B
• ordered paris C
• relation D

• 
  A
• 
  B
• 
  C
• 
  D

Addition is not operation on

• Natural numbers A
• Even numbers B
• odd numbers C
• set of integers D

If A is non-empty set, any subset of A x A is called a relation in

• A A
• B B
• ∅ C
• r D

(a,b) = (c,d) if and only if

• a=b and c =d A
• a = d and b = c B
• a = c and b = d C
• a - b = c -d D

arb mean

• a is related to b A
• b is related to a B
• a is reciprocal of b C
• a is not related to b D

If no two elements of ordered pairs of a function from A onto B are the same, then it is called

• surjective A
• injuctive B
• bijective C
• on to D

Such a function which is (1 -1) is called

• surjective A
• injuctive B
• bijective C
• into D