Interview Questions on Operators in C++

Question: 1

What following operator is called 
?: in C++?

(A) Scope Resolution Operator
(B) Conditional Operator
(C) Ternary Operator
(D) if else o/p

Compiler
Level: Beginner Category: operators
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Question: 2

What is size of int data type in C++?

(A) 2 Bytes
(B) 4 Bytes
(C) 1 Byte
(D) Depends on Compiler

Compiler
Level: Beginner Category: operators
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Question: 3

Which operator can not be overloaded in C++?

(A) +
(B) -
(C) *
(D) ::

Compiler
Level: Beginner Category: operators
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Question: 4

Which operator has highest precedence in below list in C++?

(A) +
(B) -
(C) ++
(D) *

Compiler
Level: Beginner Category: operators
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Question: 5

//What should be the output of below C++ program?

#include<iostream>

int main()
{
int a=10; 
std::cout<<a++;
return 0;
}

(A) 11
(B) 10
(C) Error
(D) 0

Compiler
Level: Beginner Category: operators
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Question: 6

//What is output of below C++ program?
#include<iostream>

int main()
{
  const int a=10;
  a++;
  std::cout<<a;
  return 0;

}

(A) 10
(B) 11
(C) Compilation Error
(D) Linking Error

Compiler
Level: Beginner Category: operators
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Question: 7

How to access and edit data in data file handling using structures

(A) read()
(B) write()
(C) both A and B
(D) without read()

Compiler
Level: Practitioner Category: operators
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Question: 8

Among the operators *, /, and %, which one has the highest precedence?

(A) *
(B) /
(C) %
(D) all have same precedence

Compiler
Level: Practitioner Category: operators
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Question: 9

Which operator has highest precedence?

(A) ()
(B) =
(C) *
(D) ++

Compiler
Level: Beginner Category: operators
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Question: 10

//What is the value of a in below C++ program?

int main()
{
 int a, b=20;
 a = 90/b;
 return 0;
}

(A) 4.5
(B) 4.0
(C) 4
(D) Compilation Error

Compiler
Level: Beginner Category: operators
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Question: 11

//What is the output of the below C++ program?

int main()
{
int a = 10;
cout<<a++;
return 0;
}

(A) 10
(B) 11
(C) 12
(D) Not defined

Compiler
Level: Beginner Category: operators
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Question: 12

What is output of the below C++ program?

int main()
{
  int a=10;
  int b,c;
  b = a++;
  c = a;
  std::cout<<a<<b<<c;
  return 0;
}

(A) 111011
(B) 111111
(C) 101011
(D) 101010

Compiler
Level: Beginner Category: operators
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Question: 13

Which operator has more precedence among the following?

*
++
+
-

(A) *
(B) ++
(C) +
(D) -

Compiler
Level: Beginner Category: operators
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Question: 14

//Find output of below program

#include<iostream>

int main()
{
int c1,c2;
int a = -8;
int b = 3;
c1 = --a + b;
c2 = a-- + b;
std::cout<<"c1="<<c1<<", "<<"c2="<<c2<<endl;

return 0;
}

(A) c1=-7,c2=-4
(B) c1=-7,c2=-3
(C) c1=-4,c1=b-3
(D) c1=-6,c2=-6

Compiler
Level: Practitioner Category: operators
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Question: 15

Which of the following is Right Shift operator?

(A) <
(B) <<
(C) ->
(D) >>

Compiler
Level: Beginner Category: operators
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Question: 16

An overloaded operator works with user defined data types

(A) True
(B) False

Compiler
Level: Practitioner Category: operators
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Question: 17

When you redefine the way a standard operator works when it is used with class objects, you have done?

(A) re-assigned
(B) reformatted
(C) constructed
(D) overloaded

Compiler
Level: Practitioner Category: operators
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Question: 18

If you overload the prefix ++ operator, the postfix ++ operator is automatically overloaded

(A) True
(B) False

Compiler
Level: Practitioner Category: operators
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Question: 19

In C++, if you overload the < operator, you must also overload TRUE FALSE the > operator

(A) True
(B) False

Compiler
Level: Practitioner Category: operators
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Interview Questions on Operators in C++ : (19)

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