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

Which of the following notation defines AxB

• 
  A
• 
  B
• 
  C
• 
  D

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

ax+by+c = 0 , represents a

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

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

The identity function is

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

N is closed with respect to ordinary

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

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

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

Which of the following diagrams represent into function?

• 
  A
• 
  B
• 
  C
• 
  D

A function f from A to B can be written as

• 
  A
• 
  B
• 
  C
• 
  D

The net of cartesian product AxB consists of

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

A semi-group having an identity is called a

• groupoid A
• non-commutative B
• abelian C
• monoid 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

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

• Surjective A
• Injuctive B
• Bijective C
• on to D

• 
  A
• 
  B
• 
  C
• 
  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

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

• A A
• B B
• D C
• r 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

If range of a function f is B, then the function is

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

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

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

Identity element, if it exists, is

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

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

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

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

• function A
• domain B
• range C
• binary relation D

The group of a constant line is

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

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following diagrams represent bijective function?

• 
  A
• 
  B
• 
  C
• 
  D

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

• Domain A
• Range B
• Function C
• Relation 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

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

The graph of a constant line is

• vertical line A
• parabola B
• circle C
• horizontal line D