Programmers At War

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Programmers At War: Challenge Your Knowledge!

Test your programming skills with our engaging quiz designed for both novice and experienced developers. Dive deep into a variety of questions that cover the intricacies of C++ programming.

10 thought-provoking questions
Multiple choice format
Instant feedback on your answers

10 Questions2 MinutesCreated by CodingKnight427

#include

using namespace std;

int main ()

{ int cin;

cin >> cin;

cout << "cin" << cin;

return 0;

}

error in using cin keyword

Cin+junk value

Cin+input

Runtime error

#include<iostream>
using namespace std;
  
int x[100];
int main()
{
    cout << x[99] << endl;
}

Unpredictable

Runtime error

#include <iostream>
#include <vector>
using namespace std;
  
class a
{
public :
    ~a()
    {
        cout << "destroy";
    }
};
int main()
{
   vector <a*> *v1  = new vector<a*>;
   vector <a> *v2  = new vector<a>;
   return 0;
}

V1 and v2

No destructor call

#include <iostream>
int const s=9;
int main()
{
    std::cout << s;
    return 0;
}

Compiler Error

Run Time Error

None of the above

#include <iostream>
class Test
{
public:
    void fun();
};
static void Test::fun()   
{
    std::cout<<"fun() is static\n";
}
int main()
{
    Test::fun();   
    return 0;
}

fun() is static

Empty Screen

Compiler Error

None Of the above

#include<iostream>
using namespace std;
  
int main()
{
  int x = 10;
  int& ref = x;
  ref = 20;
  cout << "x = " << x << endl ;
  x = 30;
  cout << "ref = " << ref << endl;
  return 0;
}

X = 20 ref = 30

X = 20 ref = 20

X = 10 ref = 30

X = 30 ref = 30

#include<iostream>
using namespace std;
  
class Base1
{
public:
    char c;
};
  
class Base2
{
public:
    int c;
};
  
class Derived: public Base1, public Base2
{
public:
    void show()  { cout << c; }
};
  
int main(void)
{
    Derived d;
    d.show();
    return 0;
}

Compiler Error in “cout << c;"

Garbage Value

Compiler Error in “class Derived: public Base1, public Base2”

Which of the following operators are overloaded by default by the compiler in every user defined classes even if user has not written?

1) Comparison Operator ( == )
2) Assignment Operator ( = )

Both 1 and 2

Only 1

Only 2

None of the two

How can we make a C++ class such that objects of it can only be created using new operator?

If user tries to create an object directly, the program produces compiler error.

Not possible

By making destructor private

By making constructor private

By making both constructor and destructor private

#include<iostream>
using namespace std;
int x = 1;
void fun()
{
    int x = 2;
    {
        int x = 3;
        cout << ::x << endl;
    }
}
int main()
{
    fun();
    return 0;
}

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