Quiz for Access control in inheritance

Q1: What does public inheritance mean?

A. Public members stay public, protected stay protected in derived class B. All members become private in derived class C. All members become protected in derived class D. Private members become public

Q2: What happens to public and protected members in private inheritance?

A. Both become private in derived class B. Both remain public C. Both become protected D. Private members become public

Q3: In protected inheritance, what is the accessibility of base class public members?

A. They become protected in derived class B. They remain public C. They become private D. They become friend

Q4: Can private members of base class be accessed by derived class?

A. No, private members are inaccessible directly B. Yes, always C. Only if inherited publicly D. Only if inherited protected

Q5: Which inheritance type is default for class?

A. Private B. Public C. Protected D. Friend

Q6: Which inheritance type is default for struct?

A. Public B. Private C. Protected D. Friend

Q7: What access level does derived class have to base class private members?

A. None B. Full C. Protected D. Public

Q8: How can derived class access private members of base class?

A. Through public or protected member functions of base class B. Directly C. Using friend keyword D. Using virtual functions

Q9: If base class member is protected, what is its accessibility in public inheritance?

A. Protected in derived class B. Public in derived class C. Private in derived class D. Friend in derived class

Q10: Can derived class reduce accessibility of base class members?

A. Yes, by using private or protected inheritance B. No, accessibility cannot be changed C. Only public inheritance can reduce accessibility D. Only friend inheritance can change accessibility

Q11: Which inheritance mode hides base class public members in derived class?

A. Private inheritance B. Public inheritance C. Protected inheritance D. Virtual inheritance

Q12: What is the effect of using "using" declaration in derived class?

A. It changes access of inherited base members B. It deletes base members C. It hides base members D. It creates new members

Q13: Can protected inheritance make private members accessible to derived class?

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

Q14: What does friend class allow in inheritance context?

A. Access to private and protected members B. Access only to public members C. Access only to protected members D. No special access

Q15: If a base class has a private member, can derived class access it directly?

A. No B. Yes, always C. Only if using protected inheritance D. Only if using public inheritance

Q16: What happens to base class private members during inheritance?

A. They are not inherited B. They are inherited as private C. They are inherited as protected D. They are inherited as public

Q17: Is it possible to access private members of base class using pointers in derived class?

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

Q18: How to make a base class member accessible to derived classes only?

A. Declare it protected B. Declare it private C. Declare it public D. Use friend keyword

Q19: What access level should be used to hide members from outside but allow derived class access?

A. Protected B. Public C. Private D. Friend

Q20: Which inheritance type allows the most restrictive access to base class members?

A. Private B. Public C. Protected D. Friend

Q21: Can access specifier change during multiple inheritance?

A. Yes, each base class can be inherited with different access B. No, access is same for all bases C. Only public inheritance allowed D. Only private inheritance allowed