Online Test

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What is the output of this program?

 #include <iostream.h>
    #include <algorithm.h>
    #include <vector.h>
    using namespace std;
    int main () 
    {
        vector<int> myvector;
        for (int i = 1; i < 6; ++i) 
            myvector.push_back(i);
        reverse(myvector.begin(), myvector.end());
        for (vector<int> :: iterator it = myvector.begin(); it != myvector.end(); ++it)
            cout << ' ' << *it;
        return 0;
    }

What is the output of this program in text files?
#include <stdio.h>
    int main ()
    {
        char buffer[BUFSIZ];
        FILE *p1, *p2;
        p1 = fopen ("myfile.txt", "w");
        p2 = fopen ("myfile2.txt", "a");
        setbuf ( p1 , buffer );
        fputs ("Buffered stream", p1);
        fflush (p1);
        setbuf ( p2 , NULL );
        fputs ("Unbuffered stream", p2);
        fclose (p1);
        fclose (p2);
        return 0;
    }

What is the output of this program?

#include <iostream.h>
    using namespace std;
    class Foo
    {
        public:
        Foo(int i = 0){ _i = i;}
        void f()
        {
            cout << "Executed"<<endl;
        }
        private:
        int _i;
    };
    int main()
    {
        Foo *p = 0;
        p -> f();
    }

What is the output of this program?

  #include <iostream.h>
   #include <string.h>
   using namespace std;
   int main ()
   {
       string str ("nobody does like this");
       string key ("nobody");
       size_t f;
       f = str.rfind(key);
       if (f != string::npos)
           str.replace (f, key.length(), "everybody");
       cout << str << endl;
       return 0;
   }

 


Which of the following statement is correct about the program given below?

#include<iostream.h> 
int val = 0; 
class TechEpi
{
    public: 
    TechEpi()
    {
        cout<< ++val;
    }
    ~TechEpi()
    {
        cout<< val--; 
    } 
}; 
int main()
{
    Techepi objEpi1, objEpi2, objEpi3;
    {
        TechEpi objEpi4;
    } 
    return 0;
}

 

Which parameter is legal for non-type template?


Which of the following statement is correct about the program given below?

#include
int EpiTest(int x, int y);
int EpiTest(int x, int y, int z = 5);
int main()
{
    cout<< EpixTest(2, 4) << endl; 
    return 0;
}
int EpiTest(int x, int y)
{
    return x * y;
}
int EpiTest(int x, int y, int z = 5)
{
    return x * y * z; 
}

What is the output of this program?

  #include <iostream.h>
    using namespace std;
    int main ()
    {
        int a = 100;
        double b = 3.14;
        cout << a;
        cout << endl;
        cout << b << endl << a * b;
        endl (cout);
        return 0;
    }

What is the output of this program?

  #include <iostream.h>
    using namespace std;
    class Car
    {
        public:
        int speed;
    };
    int main()
    {
        int Car :: *pSpeed = &Car :: speed;
        Car c1;
        c1.speed = 1;           
        cout << c1.speed << endl;
        c1.*pSpeed = 2;     
        cout  << c1.speed << endl;
        return 0;
    }

What is the kind of execution does sequence point allow?


What will be the output of the following program?

#include <iostream.h>
    #include <cstring.h>
    using namespace std;
    int main ()
    {
        char str1[10] = "Hello";
        char str2[10] = "World";
        char str3[10];
        int  len ;
        strcpy( str3, str1);
        strcat( str1, str2)
        len = strlen(str1);
        cout << len << endl;
        return 0;
    }

What is the output of this program?

 #include <iostream.h>
    using namespace std;
    template <class type>
    class Test
    {
        public:
        Test()
        {
        };
        ~Test()
        {  
        };
        type Funct1(type Var1)
        {
            return Var1;
        }
        type Funct2(type Var2)
        {
            return Var2;
        }
    };
    int main()
    {
        Test<int> Var1;
        Test<double> Var2;
        cout << Var1.Funct1(200);
        cout << Var2.Funct2(3.123);
        return 0;
    }

Which of the following statement is correct about the program given below?

#include<iostream.h> 
class TechEpi
{
    int *p; 
    public:
    TechEpi(int xx, char ch)
    {
        p  = new int(); 
        *p = xx + int(ch); 
        cout<< *p;
    }
    ~TechEpi() 
    {
        delete p;
    }
};
int main()
{
   TechEpi objEpi(10, 'B'); 
    return 0;
}

What is the output of this program?

  #include <iostream.h>
    #include <algorithm.h>
    #include <vector.h>
    using namespace std;
    bool myfunction (int i,int j) { return (i<j); }
    int main () 
    {
        int myints[] = {9, 8, 7, 6, 5};
        vector<int> myvector (myints, myints + 5);
        partial_sort (myvector.begin(), myvector.begin() + 3, myvector.end());
        partial_sort (myvector.begin(), myvector.begin() + 2, myvector.end(), 
        myfunction);
        for (vector<int> :: iterator it = myvector.begin(); it != myvector.end(); ++it)
            cout << ' ' << *it;
        return 0;
    }

 What is the output of this program?

    #include <iostream.h>
    #include <algorithm.h>
    using namespace std;
    int main () 
    {
        int myints[] = {1, 2, 3};
        sort (myints, myints + 3);
    do 
    {
    } while ( next_permutation(myints, myints + 3) );
        cout << myints[0] << ' ' << myints[1] << ' ' << myints[2] << '\n';
        return 0;
    }
 

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