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Object Oriented Programming MCQ - Classes

6 Choose the correct statements from the following:

7 The fields in a class, of a C++ program are by default

8 Class A

{

int i1;

protected :

int i2;

public :

int i3;

}

class B : public A

{

public :

int i4;

};

class C :B

{

};

The variable i2 is accessible

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9 Class A

{

int i1;

protected :

int i2;

public :

int i3;

}

class B : public A

{

public :

int i4;

};

class C :B

{

};

Which variable(s) is/are accessible from the main function?

10 The following program
class abc;
class def
{
int i1 ; // statement 1
protected: int i2; // statement 2
public: int i3; //statement 3
friend abc;
} ;
class abc
{
public:
void main(def A)
{
cout << (A.i1=3);
cout << (A.i2=4);
cout << (A.i3=5);
}
} ;
void main( )
{
def x1 ;
abc x2 ;
x2.mn(x1);
}

Since abc is a friend of def, it can access all its data, does not matter whether it is declared private, protected or public.

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Question:

For a method to be an interface between the outside world and a class, it has to be declared

A. private
B. protected
C. public
D. external

Correct answer: C

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