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

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

• Domain A
• Range B
• Function C
• Relation D

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

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

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

If no two elements of ordered pair of a functions from A into B are equal, then it is called.

• Surjective A
• Injuctive B
• Bijective C
• Onto D

The set of cartesian product A x B consists of

• Domain A
• Range B
• Binary relation C
• Ordered pair 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 function denoted by 1/f called the

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

Which of the following represent injuctive function

• 
  A
• 
  B
• 
  C
• 
  D

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

• multiplication A
• addition B
• subtraction C
• division 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 bijective function?

• 
  A
• 
  B
• 
  C
• 
  D

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

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

Which of the following is surjective

• 
  A
• 
  B
• 
  C
• 
  D

If no two elements of ordred pair of a function from A into B are equal, then it is called

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

• 
  A
• 
  B
• 
  C
• 
  D

The identity function is

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

A function f from A to B can be written as

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following diagrams represent into function?

• 
  A
• 
  B
• 
  C
• 
  D

Identity element, if it exists, is

• inverse A
• unique B
• commutative C
• associative 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

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

ax+by+c = 0 , represents a

• Circle A
• Parabola B
• Straight line C
• Quadratic circle D

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

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 group of a constant line is

• Vertical line A
• Parabola B
• Circle C
• Horizontal line D

The inverse of a line is

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

Extraction of square root of a given number is a

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