Free Test Concepts of inheritanc... – C++ Lan...

Q1: What is hierarchical inheritance?

A. One base class with multiple derived classes B. Multiple base classes with one derived class C. A class derived from another derived class D. No inheritance

Q2: Which of the following best represents hierarchical inheritance?

A. class A {}; class B : public A {}; class C : public A {}; B. class A {}; class B : public A {}; class C : public B {}; C. class A {}; class B {}; class C {}; D. class A {}; class B : public C {}; class C : public A {};

Q3: In hierarchical inheritance, how many base classes are involved?

A. One B. Two C. Three D. None

Q4: Which keyword specifies inheritance access in C++?

A. public B. inherit C. extends D. base

Q5: How does hierarchical inheritance affect code reusability?

A. Improves by sharing base class features B. Reduces reusability C. No effect D. Causes errors

Q6: In hierarchical inheritance, can derived classes have additional members?

A. Yes B. No C. Only constructors D. Only methods

Q7: Which of the following is a disadvantage of hierarchical inheritance?

A. Increased code complexity when many derived classes B. Less code reuse C. No polymorphism D. Limited access control

Q8: Can hierarchical inheritance lead to ambiguity?

A. Yes, if base class members are overridden differently B. No, never C. Only in single inheritance D. Only with templates

Q9: What happens if a base class destructor is virtual in hierarchical inheritance?

A. Correct derived destructors are called B. Only base destructor called C. Only derived destructor called D. Destructor not called

Q10: How are constructors called in hierarchical inheritance?

A. Base constructor is called first, then derived B. Derived constructor first C. Only base constructor D. Random order

Q11: Can a derived class override base class functions in hierarchical inheritance?

A. Yes B. No C. Only static functions D. Only inline functions

Q12: Which of the following is true for member access in hierarchical inheritance?

A. Derived classes access public and protected members of base B. Derived classes access private members of base C. Derived classes cannot access base members D. Only friend classes can access members

Q13: What does hierarchical inheritance help achieve in OOP?

A. Code reuse and organization B. Confusion in code C. Eliminates polymorphism D. Avoids encapsulation

Q14: In hierarchical inheritance, can multiple derived classes override the same base method differently?

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

Q15: Is multiple inheritance involved in hierarchical inheritance?

A. No B. Yes C. Sometimes D. Only in C++20

Q16: Which of these keywords is used to prevent inheritance in C++?

A. final B. abstract C. virtual D. override

Q17: Which inheritance type best supports polymorphism?

A. Hierarchical inheritance B. Single inheritance only C. No inheritance D. Multiple inheritance only

Q18: What happens if a derived class does not implement a base class virtual function?

A. Base class version is called B. Compilation error C. Run-time error D. No function call

Q19: How do you access a hidden base class member in derived class?

A. Using scope resolution operator B. Cannot access C. Using friend functions D. Using virtual functions

Quiz for Concepts of inheritance and types of inheritance hierarchical