C++ miscellaneous MCQs with Answers 2027

Q121

How many sets of requirements are need in designing a container?

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Q122

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

#include <iostream>
#include <exception>
using namespace std;
int main () 
{
    try
    {
        int* myarray = new int[1000];
        cout << "allocated";
    }
    catch (exception& e)
    {
        cout << "Standard exception: " << e.what() << endl;
    }
    return 0;
}

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Q123

Open question

What kind of library is Standard Template Library?

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Q124

Open question

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

#include <iostream>
#include <string>
using namespace std;
int main()
{
	cout<<is_same<int,char>::value;
	cout<<is_same<char[10], char[10]>::value;
	cout<<is_same<char*[10], string>::value;
	return 0;
}

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Q125

Open question

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

#include <iostream>
#include <queue>  
using namespace std;
int main ()
{
    queue<int> myqueue;
    myqueue.push(12);
    myqueue.push(75);  
    myqueue.back() -= myqueue.front();
    cout << myqueue.back() << endl;
    return 0;
}

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Q126

Open question

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

#include <iostream>
#include <functional>
#include <numeric>
using namespace std;
int myfunction (int x, int y) 
{
    return x + 2 * y;
}
struct myclass 
{
    int operator()(int x, int y) 
    {
        return x + 3 * y;
    }
} myobject;
int main () 
{
    int init = 100;
    int numbers[] = {10, 20, 30};
    cout << accumulate (numbers, numbers + 3, init, minus<int>() );
    cout << endl;
    return 0;
}

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Q127

Open question

What is the difference between begin() and cbegin() in vectors?

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Q128

Open question

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

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

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Q129

Open question

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

#include <stdio.h> 
#include <ctype.h>
int main ()
{
    int i = 0;
    char str[] = "C";
    while (str[i])
    {
        if (isalpha(str[i])) 
            printf ("alphabetic");
        else 
            printf ("not alphabetic");
        i++;
    }
    return 0;
}

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Q130

Open question

Which of the header file is used to implement algorithms provided by C++ STL?

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Q131

Open question

To what type of object does the container can be instantiated?

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Q132

Open question

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

#include <iostream>
using namespace std;
int main()
{
   int var = -12;
   try {
      cout<<"Inside try\n";
      if (var < 0)
      {
        throw var;
        cout<<"After throw\n";
      }
   }
   catch (char var ) {
      cout<<"Exception Caught\n";
   }
 
   cout<<"After catch\n";
   return 0;
}

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Q133

Open question

What is Valarray in C++?

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Q134

Open question

What are Distributions in C++?

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Q135

Open question

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

#include <cstdlib>
#include <ctime>
#include <iostream>
using namespace std;
int main()
{
    srand((unsigned)time(0));
    int ran;
    for (int i = 0; i < 2; i++)
    {
        ran = (rand() % 10) + 1;
        cout << ran;
    }
}

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Q136

Open question

How many parameters are available in srand function?

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Q137

Open question

Which one is used to refer to program elements in any translation units?

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Q138

Open question

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

#include <iostream>
#include <functional>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;
int main () 
{
    vector <string*> numbers;
    numbers.push_back ( new string ("one") );
    numbers.push_back ( new string ("two") );
    numbers.push_back ( new string ("three") );
    vector <int> lengths ( numbers.size() );
    transform (numbers.begin(), numbers.end(), lengths.begin(), 
    mem_fun(&string :: length));
    for (int i = 0; i < 3; i++) 
    {
        cout << lengths[i];
    }
    return 0;
}

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Q139

Open question

What can be improved by formatting the source code?

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Q140

Open question

How many types of class relationships are there?

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C++ miscellaneouspractice.

C++ miscellaneous
practice.