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100 MCQ on C++ Programming

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Question: 21

Can we assign null to void pointer?

(A) No
(B) Yes

Compiler
Level: ExpertCategory: datatype
[Posted by: Admin | Chicago, USA]

Question: 22

Can a class contain another class in it ?

(A) Yes
(B) No

Compiler
Level: PractitionerCategory: datatype
[Posted by: Admin | Chicago, USA]

Question: 23

What is the size of empty class?

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

Compiler
Level: PractitionerCategory: datatype
[Posted by: Admin | Chicago, USA]

Question: 24

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
Level: PractitionerCategory: polymorphism
[Posted by: Admin | Chicago, USA]

Question: 25

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

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

Compiler
Level: BeginnerCategory: datatype
[Posted by: Admin | Chicago, USA]

Question: 26

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
Level: ExpertCategory: vtable
[Posted by: Admin | Chicago, USA]

Question: 27

#include<iostream>
using namespace std;

int main()
{

cout<<-1-1-1;

return 0;
}

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

Compiler
Level: BeginnerCategory: other
[Posted by: Admin | Chicago, USA]

Question: 28

#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
Level: ExpertCategory: inheritance
[Posted by: Admin | Chicago, USA]

Question: 29

class Mycpp
{
    
};

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

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

Compiler
Level: BeginnerCategory: classesAndobjects
[Posted by: Admin | Chicago, USA]

Question: 30

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
Level: BeginnerCategory: classesAndobjects
[Posted by: Admin | Chicago, USA]

Question: 31

C++ is superset of which langauge?

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

Compiler
Level: BeginnerCategory: other
[Posted by: Admin | Chicago, USA]

Question: 32

What is size of void in C++?

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

Compiler
Level: ExpertCategory: loops
[Posted by: Admin | Chicago, USA]

Question: 33

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
Level: PractitionerCategory: conditional
[Posted by: Admin | Chicago, USA]

Question: 34

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
Level: BeginnerCategory: loops
[Posted by: Admin | Chicago, USA]

Question: 35

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
Level: BeginnerCategory: other
[Posted by: Admin | Chicago, USA]

Question: 36

Can any function call itself?

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

Compiler
Level: BeginnerCategory: function
[Posted by: Admin | Chicago, USA]

Question: 37

What is size of void in bytes?

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

Compiler
Level: BeginnerCategory: datatype
[Posted by: Admin | Chicago, USA]

Question: 38

Can a Structure contain pointer to itself?

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

Compiler
Level: BeginnerCategory: structure
[Posted by: Admin | Chicago, USA]

Question: 39

Can a for loop contain another for loop?

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

Compiler
Level: BeginnerCategory: loops
[Posted by: Admin | Chicago, USA]

Question: 40

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
Level: BeginnerCategory: operators
[Posted by: Admin | Chicago, USA]

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