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C++ Objective Questions - 265

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Question: 1

How many loops are there in C++ 98?

(A) 2
(B) 3
(C) 4
(D) 1

Compiler Forum
Level: Beginner Category: loops
[Posted by: Admin | Chicago, USA]

Question: 2

What is the output of below program?

int main()
{
 if(0)
 {
    cout<<"Hi";
 }
 else
 {
    cout<<"Bye";
 }
return 0;
}

(A) Hi
(B) Bye
(C) HiBye
(D) Compilation Error

Compiler Forum
Level: Beginner Category: conditional
[Posted by: Admin | Chicago, USA]

Question: 3

What following operator is called 
?:

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 4

What is size of int data type in cpp?

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 5

Which operator can not be overloaded?

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 6

Which operator has more precedance  in below list?

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 7

What should be the output of below program?

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

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 8

Can we typecast void * into int *?

(A) Yes
(B) No
(C) Undefined
(D) Depends on Compiler

Compiler Forum
Level: Practitioner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 9

What is currect syntax of for loop?

(A) for(initialization;condition; increment/decrement)
(B) for(increment/decrement; initialization; condition)
(C) for(initialization, condition, increment/decrement
(D) None of These

Compiler Forum
Level: Beginner Category: loops
[Posted by: Admin | Chicago, USA]

Question: 10

#include<iostream.h>
void Execute(int &x, int y = 200)
{
 int TEMP = x + y;
 x+= TEMP;
 if(y!=200)
     cout<<TEMP<<x<<y"--";
}

int main()
{
 int A=50, B=20;
 cout<<A<<B<<"--";
 Execute(A,B);
 cout<<A<<B<<"--";
 return 0;
}

(A) 5020--5020--
(B) 5020--7012020--12020--
(C) 5020--70120200--5020
(D) 5020--7050200--5020--

Compiler Forum
Level: Practitioner Category: function
[Posted by: Admin | Chicago, USA]

Question: 11

Can we overload functions in C++?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

Compiler Forum
Level: Beginner Category: function
[Posted by: Admin | Chicago, USA]

Question: 12

How many times CppBuzz.com is printed?

int main()
{
    int i=0;
    lbl:
    cout<<"CppBuzz.com";
    i++;
    if(i<5)
    {
	goto lbl;
    }
return 0;

}

(A) Error
(B) 5 times
(C) 4 times
(D) 6 times

Compiler Forum
Level: Practitioner Category: loops
[Posted by: Admin | Chicago, USA]

Question: 13

What is output of below program?
int main()
{
  const int a=10;
  a++;
  cout<<a;
return 0;

}

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 14

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 Forum
Level: Practitioner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 15

Which operator has highest precedence in * / % ?

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

Compiler Forum
Level: Practitioner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 16

Which operator has highest precedence?

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 17

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

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

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 18

class base
{
public:
       base()
       {          
           cout<<"BCon";
       }
       ~base()
       {
	   cout<<"BDest ";
       }
};
class derived: public base
{
public:
       derived()
       {     cout<<"DCon ";
       }
       ~derived()
       {     cout<<"DDest ";
       }
};

int main()
{
derived object;
return 0; 
}

(A) Dcon DDest
(B) Dcon DDest BCon BDest
(C) BCon DCon DDest BDest
(D) BCon DCon BDes DDest

Compiler Forum
Level: Beginner Category: classesAndobjects
[Posted by: Admin | Chicago, USA]

Question: 19

//What is the output of below program?

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

}

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 20

What is the full form of oop

(A) Object oriented programming
(B) Oriented object programming
(C) Office oriented programming
(D) office objective programming

Compiler Forum
Level: Beginner Category: other
[Posted by: Admin | Chicago, USA]

Question: 21

What is output of below program?

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

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

Compiler Forum
Level: Beginner Category: operators
[Posted by: Admin | Chicago, USA]

Question: 22

Can a for loop contain another for loop?

(A) No
(B) Yes
(C) Compilation Error
(D) Runtime Error

Compiler Forum
Level: Beginner Category: loops
[Posted by: Admin | Chicago, USA]

Question: 23

Can a Structure contain pointer to itself?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

Compiler Forum
Level: Beginner Category: structure
[Posted by: Admin | Chicago, USA]

Question: 24

What is size of void in bytes?

(A) 1
(B) 2
(C) 4
(D) 0

Compiler Forum
Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 25

Can any function call itself?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

Compiler Forum
Level: Beginner Category: function
[Posted by: Admin | Chicago, USA]

Question: 26

What should be the output of below program?

int main()
{
 cout<<"CppBuzz";;;;;  
 return 0;                                                                          
}

(A) Compilation Error
(B) Runtime Error
(C) CppBuzz
(D) CppBuzz;;;;

Compiler Forum
Level: Beginner Category: other
[Posted by: Admin | Chicago, USA]

Question: 27

What should be the output?

int main() {
    int new = -10;
    cout<<"new is: "<<new;
    return 0;
}

(A) new is: -10
(B) new is: 10
(C) Compilation Error
(D) new is: 0

Compiler Forum
Level: Beginner Category: loops
[Posted by: Admin | Chicago, USA]

Question: 28

What should be the output of below program?

int main()
{
    int a = 1;
    switch(a)
    {
        case 1: cout<<"One";
        case 2: cout<<"Two";
        case 3: cout<<"Three";
        default: cout<<"Default";
    }
    return 0;

}

(A) One
(B) Compilation Error
(C) Default
(D) OneTwoThree

Compiler Forum
Level: Practitioner Category: conditional
[Posted by: Admin | Chicago, USA]

Question: 29

What is size of void in C++?

(A) 2 Bytes
(B) 4 Bytes
(C) Undefined
(D) 0

Compiler Forum
Level: Expert Category: loops
[Posted by: Admin | Chicago, USA]

Question: 30

C++ is superset of which langauge?

(A) BASIC
(B) VB
(C) PASCAL
(D) C

Compiler Forum
Level: Beginner Category: other
[Posted by: Admin | Chicago, USA]

Question: 31

class Mycpp
{
    int Mycpp()
    {
       cout<<"Constructor";
       return 0;
     }
};

int main()
{
    Mycpp obj;
    return 0;
}

(A) Constructor
(B) 0
(C) Compilation Error
(D) Runtime Error

Compiler Forum
Level: Beginner Category: classesAndobjects
[Posted by: Admin | Chicago, USA]

Question: 32

class Mycpp
{
    
};

int main()
{
    Mycpp obj;
    return 0;
}

(A) Compilation Error - Constructor Missing
(B) Nothing would be printed
(C) Undefined
(D) In constructor

Compiler Forum
Level: Beginner Category: classesAndobjects
[Posted by: Admin | Chicago, USA]

Question: 33

#include <iostream>
using namespace std;

class X
{
public: X()
        { cout<<"X"; }
        ~X()
        { cout<<"~X"; }
};

class Y : public X
{
public: Y()
        { cout<<"Y"; }
        ~Y()
        { cout<<"~Y"; }
};

int main()
{
    Y obj;
    return 0;
}

(A) XY~X~Y
(B) XY~Y~X
(C) X~XY~Y
(D) X~X~YY

Compiler Forum
Level: Expert Category: inheritance
[Posted by: Admin | Chicago, USA]

Question: 34

#include<iostream>
using namespace std;

int main()
{

cout<<-1-1-1;

return 0;
}

(A) Compilation Error
(B) 0
(C) 3
(D) -3

Compiler Forum
Level: Beginner Category: other
[Posted by: Admin | Chicago, USA]

Question: 35

When Virtual Table is created?

(A) Every Class has VTable
(B) Class inherited from other Class
(C) When a Class Overrides the function of Base class
(D) Class has atleast one Virtual Function

Compiler Forum
Level: Expert Category: vtable
[Posted by: Admin | Chicago, USA]

Question: 36

How many object can be created of a Class in C++?

(A) 1
(B) 5
(C) There is no limit
(D) 256

Compiler Forum
Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 37

What is abstract class?

(A) A class with abstract keyword
(B) A class with no functions in it
(C) A class with atleast one pure virtual function
(D) Empty Class

Compiler Forum
Level: Practitioner Category: polymorphism
[Posted by: Admin | Chicago, USA]

Question: 38

What is the size of empty class?

(A) 0
(B) 1
(C) 2
(D) 4

Compiler Forum
Level: Practitioner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 39

Can a class contain another class in it ?

(A) Yes
(B) No

Compiler Forum
Level: Practitioner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 40

Can we assign null to void pointer?

(A) No
(B) Yes

Compiler Forum
Level: Expert Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 41

Can we create our own workspace?

(A) Yes
(B) No

Compiler Forum
Level: Practitioner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 42

When can we have two classes with same name?

(A) We cant have
(B) In different work space
(C) Can have but in different file
(D) We can have in any scenario

Compiler Forum
Level: Practitioner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 43

Can we create array of reference?

(A) Yes
(B) No

Compiler Forum
Level: Practitioner Category: other
[Posted by: Admin | Chicago, USA]

Question: 44

Exceptions are Caught at ?

(A) Compilation Time
(B) Run Time
(C) Linking Time
(D) No

Compiler Forum
Level: Expert Category: loops
[Posted by: Admin | Chicago, USA]

Question: 45

Which of the following is Memory Leak detection tool?

(A) GC++
(B) KDevelop
(C) GIT
(D) Valgrind

Compiler Forum
Level: Expert Category: new_delete
[Posted by: Admin | Chicago, USA]

Question: 46

Is const better than #define?

(A) Yes
(B) No

Compiler Forum
Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 47

Is it good idea to return an address or a reference of a local variable?

(A) Yes
(B) No

Compiler Forum
Level: Beginner Category: function
[Posted by: Admin | Chicago, USA]

Question: 48

How to stop Name Mangling in C++?

(A) It is not possible
(B) It is possible only with C code
(C) By using extern "C" keyword
(D) By Converting C++ code to C

Compiler Forum
Level: Practitioner Category: function
[Posted by: Admin | Chicago, USA]

Question: 49

Can we create object of Abstract class?

(A) Yes
(B) No

Compiler Forum
Level: Practitioner Category: abstract_class
[Posted by: Admin | Chicago, USA]

Question: 50

Is there any difference in below two statements?

int a = 10;
int a(10);

(A) Yes
(B) No

Compiler Forum
Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

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Home » C++ » C++ Objective Questions (Page-1)

C++ Objective Questions - 265

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CppBuzz Forum☆

Shortcut links - MCQs

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Free Projects

Online Compiler

Upload Questions

Online Test

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