C++ miscellaneous MCQs with Answers 2027

Q321

Open question

Subsequent elements are moved in terms of . . . . . . . . when an element in inserted in vector?

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Q322

Open question

Sets are implemented using . . . . . . . .

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Q323

Open question

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

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

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Q324

Open question

Which of the following operations can be performed on a pair?

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Q325

Open question

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

#include <iostream>
#include <exception>
using namespace std;
void myunexpected () 
{
    cout << "unexpected handler called\n";
    throw;
}
void myfunction () throw (int,bad_exception) 
{
    throw 'x';
}
int main (void)
{
    set_unexpected (myunexpected);
    try 
    {
        myfunction();
    }    
    catch (int) 
    { 
        cout << "caught int\n"; 
    }
    catch (bad_exception be) 
    { 
        cout << "caught bad_exception\n"; 
    }
    catch (...) 
    { 
        cout << "caught other exception \n"; 
    }
    return 0;
}

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Q326

Open question

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

#include <iostream>
using namespace std;
template<typename type>
class TestVirt
{
    public:
    virtual type TestFunct(type Var1)
    {
        return Var1 * 2;
    }
};
int main()
{
    TestVirt<int> Var1;
    cout << Var1.TestFunct(100) << endl;
    return 0;
}

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Q327

Open question

Which of the following is correct about swap()?

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Q328

Open question

Which function is used to check whether a character is tab or space or whitespace control code(\n,\r,etc.)?

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Q329

Open question

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

#include <iostream>
using namespace std;
class stu
{
    protected:
    int rno;
    public:
    void get_no(int a)
    {
        rno = a;
    }
    void put_no(void)
    {
    }
};
class test:public stu
{
    protected:
    float part1,part2;
    public:
    void get_mark(float x, float y)
    {
        part1 = x;
        part2 = y;
    }
    void put_marks()
    {
    }
};
class sports
{
    protected:
    float score;
    public:
    void getscore(float s)
    {
        score = s;
    }
    void putscore(void)
    {
    }
};
class result: public test, public sports
{
    float total;
    public:
    void display(void);
};
void result::display(void)
{
    total = part1 + part2 + score;
    put_no();
    put_marks();
    putscore();
    cout << "Total Score=" << total << "\n";
}
int main()
{
    result stu;
    stu.get_no(123);
    stu.get_mark(27.5, 33.0);
    stu.getscore(6.0);
    stu.display();
    return 0;
}

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Q330

Open question

Which type of list a Forward_list sequence container implements?

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Q331

Open question

Which operator is used to take OR of two bitset variables?

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Q332

Open question

How many levels are there in exception safety?

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Q333

Open question

Which of the following is the correct way of declaring a tuple?

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Q334

Open question

To which type does the numeric limits are suitable?

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Q335

Open question

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

#include <iostream>
#include <fstream>
using namespace std;
int main () 
{
    int length;
    char * buffer;
    ifstream is;
    is.open ("sample.txt", ios :: binary );
    is.seekg (0, ios :: end);
    length = is.tellg();
    is.seekg (0, ios :: beg);
    buffer = new char [length];
    is.read (buffer, length);
    is.close();
    cout.write (buffer, length);
    delete[] buffer;
    return 0;
}

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Q336

Open question

What will happen when we use void in argument passing?

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Q337

Open question

At which time does the static_cast can be applied?

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Q338

Open question

Which of the following library is used to do vector arithmetic?

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Q339

Open question

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

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main () 
{
    int myints[] = {10, 20, 30, 5, 15};
    vector<int> v(myints, myints + 5);
    make_heap (v.begin(), v.end());
    pop_heap (v.begin(), v.end()); v.pop_back();
    v.push_back(99); push_heap (v.begin(), v.end());
    sort_heap (v.begin(), v.end());
    for (unsigned i = 0; i < v.size(); i++)
        cout << ' ' << v[i];
    return 0;
}

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Q340

Open question

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

#include <iostream>
using namespace std; 
int main()
{
    try
    {
        try
        {
            throw 20;
        }
        catch (int n)
        {
            cout << "Inner Catch\n";
            throw;
        }
    }
    catch (int x)
    {
        cout << "Outer Catch\n";
    }
    return 0;
}

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C++ miscellaneouspractice.

C++ miscellaneous
practice.