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Objects and Classes problems

1. Which of the following statements is correct about the constructors and destructors?
Options
A. Destructors can take arguments but constructors cannot.
B. Constructors can take arguments but destructors cannot.
C. Destructors can be overloaded but constructors cannot be overloaded.
D. Constructors and destructors can both return a value.

2. How can we make a class abstract?
Options
A. By making all member functions constant.
B. By making at least one member function as pure virtual function.
C. By declaring it abstract using the static keyword.
D. By declaring it abstract using the virtual keyword.

3. What does the class definitions in following code represent?

class Bike
{
    Engine objEng;
};
class Engine
{
    float CC;
};

Options
A. kind of relationship
B. has a relationship
C. Inheritance
D. Both A and B

4. Which of the following statements about virtual base classes is correct?
Options
A. It is used to provide multiple inheritance.
B. It is used to avoid multiple copies of base class in derived class.
C. It is used to allow multiple copies of base class in a derived class.
D. It allows private members of the base class to be inherited in the derived class.

6. Which of the following statement is correct with respect to the use of friend keyword inside a class?
Options
A. A private data member can be declared as a friend.
B. A class may be declared as a friend.
C. An object may be declared as a friend.
D. We can use friend keyword as a class name.

7. Which of the following statements are correct for a static member function?
1. It can access only other static members of its class.
2. It can be called using the class name, instead of objects.
Options
A. Only 1 is correct.
B. Only 2 is correct.
C. Both 1 and 2 are correct.
D. Both 1 and 2 are incorrect.

8. Which of the following statements is correct when a class is inherited publicly?
Options
A. Public members of the base class become protected members of derived class.
B. Public members of the base class become private members of derived class.
C. Private members of the base class become protected members of derived class.
D. Public members of the base class become public members of derived class.

10. Which of the following statement is correct regarding destructor of base class?
Options
A. Destructor of base class should always be static.
B. Destructor of base class should always be virtual.
C. Destructor of base class should not be virtual.
D. Destructor of base class should always be private.

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