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

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 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 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

Which of the following diagrams represent into function?

• 
  A
• 
  B
• 
  C
• 
  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

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

A function f from A to B can be written as

• 
  A
• 
  B
• 
  C
• 
  D

The function denoted by 1/f called the

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

the function y = mx+c is, called linear function, because

• it has only two variables A
• it has one varible B
• its graphs is straight line C
• its graphs is circle D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

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

• multiplication A
• addition B
• subtraction C
• division 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

Function is a special type of

• relation A
• ordered pairs B
• Cartesian product C
• Set 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 group of a constant line is

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

Negation of a given number is an example of

• Binary operation A
• group B
• unary operation C
• function D

Identity element, if it exists, is

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

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

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

The net of cartesian product AxB consists of

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

There will be no inverse if the function is

• one -to - one A
• One to many B
• onto C
• into 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

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

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