Quiz for Base and derived classes

Q1: What is a base class in C++ inheritance?

A. A class from which other classes derive B. A class derived from other classes C. A class that cannot be inherited D. A class with no members

Q2: What is a derived class?

A. A class that inherits from a base class B. A class that has no base class C. A class with only private members D. A class used only in templates

Q3: How do you declare inheritance from a base class?

A. class Derived : access_specifier Base {}; B. class Base : Derived {}; C. class Derived inherits Base; D. class Derived extends Base;

Q4: What is the default access specifier for inheritance in C++ class?

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

Q5: Which access specifier allows derived classes to access base members?

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

Q6: Can a derived class access private members of the base class directly?

A. No B. Yes C. Only if friend D. Only if virtual

Q7: Which keyword is used to call a base class constructor in derived class?

A. : Base() B. base() C. parent() D. super()

Q8: If no constructor is defined in derived class, which constructor is called?

A. Base class default constructor B. No constructor called C. Derived class default constructor D. Compiler error

Q9: Can a derived class override a base class method?

A. Yes, if method is virtual B. No C. Only static methods D. Only private methods

Q10: What happens if base class destructor is not virtual?

A. Undefined behavior when deleting derived objects B. No effect C. Compilation error D. Derived destructors not called

Q11: Which of these statements is correct?

A. Derived class inherits base class members except constructors and destructors B. Derived class inherits constructors C. Derived class inherits private members D. Derived class cannot add new members

Q12: What is slicing in C++ inheritance?

A. Assigning derived object to base object causing loss of derived parts B. Copying base class C. Casting base to derived D. Overloading operator=

Q13: How do you access a base class member that is hidden by derived class?

A. Using scope resolution operator Base::member B. Using this->member C. Using derived::member D. Cannot be accessed

Q14: What access specifier allows base class members to be accessible everywhere?

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

Q15: Can you instantiate an object of an abstract base class?

A. No B. Yes C. Only with new D. Only if all pure virtual functions implemented

Q16: What happens if you assign derived class pointer to base class pointer?

A. Upcasting, allowed implicitly B. Downcasting, allowed implicitly C. Compilation error D. Runtime error

Q17: How to prevent inheritance from a class?

A. Declare class as final B. Make constructor private C. Use virtual keyword D. Use friend keyword

Q18: Is multiple inheritance allowed in C++?

A. Yes B. No C. Only with interfaces D. Only with virtual functions

Q19: What is the effect of virtual functions in base class?

A. Supports runtime polymorphism B. Disables inheritance C. Makes functions inline D. Prevents overriding

Q20: What does "override" specifier ensure?

A. Derived function overrides base virtual function B. Function overloads base function C. Function is new D. Function is static