21. Static members of a class

A. means class variable 

B. have the same properties as that of global variables but having class scope 

C. A and B 

D. A or B 

22. Which statement is true in case of a destructor?

A. A destructor can be overloaded 

B. A destructor has to be called explicitly 

C. A destructor does not return any value 

D. A destructor can have parameters 

23. Overloading of which operator will be similar to invoking a copy constructor?

A. + 

B. . (dot) 

C. = 

D. ~ (tilde) 

24. In which of the following cases is a copy constructor invoked?

A. When a new object of a class is initialized with the existing object of that class 

B. When a copy of an object is passed by value as an argument to a function 

C. When you return an object of the class by value 

D. All of the above 

25. When does dynamic binding occur?

A. During construction 

B. During compilation 

C. During linking 

D. During execution 

26. Overriding causes _________

A. base class function to be called 

B. derived class function to be called 

C. a virtual function to be called 

D. first base class then derived class function to be called 

27. With which of the following streams is the keyboard device associated by default?

A. cerr 

B. clog 

C. cin 

D. cout 

28. What is true about a virtual base class?

A. Constructors for virtual base classes are invoked before any non-virtual base classes 

B. A class whose constructors have parameters can be a virtual base class 

C. Only one copy of the class is inherited by the next generation class 

D. All of the above are true 

29. Static member functions _________

A. can be used without an instantiation of an object 

B. Can only access static data 

C. A and B 

D. Neither A nor B 

30. Which of the following statements have errors?

A. cout.width(10).precision(3); 

B. cout << resetiosflags(ios::left,ios::showpoint); 

C. cout << put(“siit”); 

D. All of the above statements have errors 

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