What does an empty class contain?

1. Default constructor
2. Copy constructor
3. Address of operator
4. All of the above

In protected derivation

1. Protected and public members of base class become protected 
2. Private, protected and public members of base class become protected 
3. Private, protected and public members  of base class become private 
4. Protected and public members of base class become private

What is the output of the program?

    #include <iostream.h>

    void main()
    {
        int j = 20, k = 30;
        int & m = j;
        int * n = &j;
        cout << j << " " << k << " " << m << " ++ " ;
        m = k;
        cout << j << " " << k << " " << m << " ++ ";
        n = &k; // n now points to k
        cout << j << " " << k << " " << m << " " << *n << endl;
    }

1. 20 30 20 ++ 20 30 30 ++ 30 30 30 30
2. 20 30 20 ++ 30 30 30 ++ 20 30 30 30
3. 20 30 20 ++ 20 30 30 ++ 20 30 30 30
4. 20 30 20 ++ 30 30 30 ++ 30 30 30 30

Class istream in iostream.h is defined as

1. Class istream : public ios 
2. Class istream : public virtual ios 
3. Class istream : public iostream 
4. Class istream : public virtual iostream

Interface contains 

1. At least one pure virtual function 
2. No pure virtual function 
3. All pure virtual functions 
4. None of the above

What is the size of empty class?

1. 0 bytes
2. 2 bytes 
3. 1 byte
4. 4 bytes

The advantage of defining a pure virtual member function in a class is

1. Derived class may implement the pure virtual function
2. Derived class must implement the pure virtual function
3. Derive class is abstract class if it does not implement the pure virtual function
4. Both B and C

What is the output of the following?

    #include
   
    void main()
    {
        int x, y;
        x=(3, 4, 5);
        y=3, 4, 5;
        cout << endl <<  x <<"  "<< y;
    }

1. Compilation Error
2. 3 5
3. 3 3
4. 5 3

What is the output of the following?

    #include <iostream.h>

    void main ()
    {
        {
            for(int x=1; x <= 5; x++, x+=5);
        }
        cout << endl << " value of x = " << x;
    }

1. 6
2. 7
3. compilation error
4. 2

What is the output of the following?

    #include <iostream.h>

    void main ()
    {
        cout << (cout<<" Hello ") << " world ";
    }

1. No output is displayed
2. Hello some_address_value world
3. Hello world
4. compilation error

The class fstreambuf serves as base class for

1. ifstream, ofstream, fstream
2. ifstream, ofstream
3. ostream
4. ifstream

The scope resolution operator permits

1. Access to an identifier in the global scope that has been hidden by another identifier with the same name in the local scope
2. Access to an identifier in the global space
3. Access to an identifier in the local scope
4. Access to an identifier in the local scope and global scope

The declaration
    void func_name( )
accepts

1. Any no of arguments
2. Only one argument
3. No Arguments
4. None of the above

The technique of allocating memory during runtime on demand is known as

1. Dynamic binding
2. Dynamic memory allocation
3. Late binding
4. Template

What is the output of the following?

    #include

The advantage of defining a pure virtual member function in a class is

1. Derived class may implement the pure virtual function
2. Derived class must implement the pure virtual function
3. Derive class is abstract class if it does not implement the pure virtual function
4. Both B and C

Input and output operators are known as

1. extraction and insertion
2. get from and put to
3. Both A and B
4. None of the above

A file can be tied to your program by defining an instance of

1. fstream
2. ifstream
3. ofstream
4. All of the above

Which of the following is not true about constructor

1. constructor can be overloaded
2. constructor return type is int
3. constructor has the same name as the class in which it is defined
4. constructor are used for initializing data members

What is the output of the program?

    #include <iostream.h>
    char *buf1 = "Genesis", *buf2 = "InSoft";

    void main()
    {
        const char *p = buf1;
        p = buf2;
        *p = 'g';
        cout << *p;
    }

What is the output of the program?

1. g
2. genesis
3. No ouput is displayed
4. l-value specifies constant object