C++ miscellaneous MCQs with Answers 2027

Q601

Open question

What are binary functors?

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Q602

Open question

Why do we need relationships between classes?

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Q603

Open question

What will be the output of the following C++ code?

#include <iostream>  
#include <utility>
#include <string>
 
using namespace std;
 
int main () 
{
  pair <int,int> p1(1,2);
  pair <int,int> p2(3,4);
  cout<<"Pair(first,second) = ("<<p1.first<<","<<p1.second<<")\n";
  p1.swap(p2);
  cout<<"Pair(first,second) = ("<<p1.first<<","<<p1.second<<")\n";
  return 0;
}

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Q604

Open question

What is meant by permutation in c++?

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Q605

Open question

Which operators are used in the free store?

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Q606

Open question

Which algorithm is used in subtract_with_carry_engine?

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Q607

Open question

What will be the output of the following C++ code?

#include<iostream> 
#include<iterator> 
#include<vector> 
using namespace std; 
int main() 
{ 
    vector<int> ar = { 1, 2, 3, 4, 5 }; 
    vector<int>::iterator ptr = ar.begin(); 
    ptr = next(ptr, 3);
    cout << *ptr << endl; 
    return 0; 
}

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Q608

Open question

What will be the output of the following C++ code?

#include <iostream>
#include <exception>
using namespace std;
struct MyException : public exception
{
    const char * what () const throw ()
    {
        return "C++ Exception";
    }
};
int main()
{
    try
    {
        throw MyException();
    }
    catch(MyException& e)
    {
        cout << "Exception caught" << std::endl;
        cout << e.what() << std::endl;
    }
    catch(std::exception& e)
    {
    }    
}

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Q609

Open question

What will be the output of the following C++ code?

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main () 
{
    vector<int> myvector (5);
    fill (myvector.begin(), myvector.begin() + 4, 5);
    fill (myvector.begin() + 3,myvector.end() - 2, 8);
    for (vector<int> :: iterator it = myvector.begin();
        it != myvector.end(); ++it)
    cout << ' ' << *it;
    return 0;
}

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Q610

Open question

What will be the output of the following C++ code?

#include <iostream>  
#include <utility>
 
using namespace std;
 
int main () 
{
  pair <int,int> p(1,2);
  cout<<"Pair(first,second) = ("<<p.first<<","<<p.second<<")\n";
  return 0;
}

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Q611

Open question

Which operator is used to create the user-defined streams in c++?

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Q612

Open question

What is the use of swap() function in array class?

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Q613

Open question

Which operator is used to allocate the memory?

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Q614

Open question

Which is used to describe the function using placeholder types?

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Q615

Open question

What is the syntax of class template?

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Q616

Open question

What is the correct statement about lambda expression?

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Q617

Open question

In nested try-catch block, if the inner catch block gets executed, then . . . . . . . .

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Q618

Open question

Which of the header file is used for array type manipulation?

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Q619

Open question

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main()
{
	cout<<extent<remove_extent<string[10][20]>::type>::value;
	cout<<extent<remove_extent<string[10][20][30]>::type>::value;
	return 0;
}

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Q620

Open question

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class Test1 
{ 
};
class Test2 : public Test1 { };
void Funct();
int main()
{
    try
    {
        Funct();
    }
    catch (const Test1&)
    {
        cerr << "Caught a exception" << endl;
    }
    return 0;
}
void Funct()
{
    throw Test2();
}

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C++ miscellaneouspractice.

C++ miscellaneous
practice.