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

Addition is not operation on

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

N is closed with respect to ordinary

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

• 
  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

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

• A A
• B B
• D C
• r D

The set of second elements of the ordered pairs forming a relation is called a

• Domain A
• range B
• function C
• relation D

Extraction of square root of a given number is a

• unary operation A
• binary operation B
• group C
• inverse function D

• bijective function A
• into function B
• onto function C
• surjective 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

(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

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

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

Identity element, if it exists, is

• inverse A
• unique B
• commutative C
• associative D

The inverse of a line is

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

Function is a special type of

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

Which of the following is surjective

• 
  A
• 
  B
• 
  C
• 
  D

The net of cartesian product AxB consists of

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

A function from A to B is called on-to function, if its range is

• A A
• B B
• A and B C
• neither A nor B 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

The set of second elements of the ordered pairs forming a relation called a

• Domain A
• Range B
• Function C
• Relation 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

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

A function∫ will have an inverse function if and only if it is a

• onto function A
• into function B
• Constant C
• one-one function D

The set of cartesian product A x B consists of

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

Which of the following diagrams represent bijective function?

• 
  A
• 
  B
• 
  C
• 
  D

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

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

Let A and B be two non-empty sets, then any subset of the cartesian product A x B called a

• Function A
• Domain B
• Range C
• Binary relation D

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

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