Inheritance — Practice MCQs for CCAT

Correct Answer: B — Multiple

Multiple inheritance causes diamond problem when two parent classes inherit from same grandparent.

Correct Answer: B — Virtual inheritance

Virtual inheritance ensures only one copy of base class members.

Correct Answer: C — Public in derived

In public inheritance, public members remain public in derived class.

Correct Answer: A — Private in derived

In private inheritance, public members become private in derived class.

Correct Answer: B — Before derived constructor

Base class constructor is called first, then derived class constructor.

Correct Answer: B — Derived first

Destructors are called in reverse order: derived first, then base.

Correct Answer: B — Chain of inheritance (A→B→C)

Multilevel: A derives B, B derives C (chain).

Correct Answer: A — One base, multiple derived

Hierarchical: multiple classes derive from one base class.

Correct Answer: B — Inherited but not accessible

Private members are inherited but not directly accessible in derived class.

Correct Answer: B — Protected

Protected members remain protected in public inheritance.

Correct Answer: B — Before derived constructor

Base class constructor is always called first before the derived class constructor.

Correct Answer: B — Derived first, then base

Destructors are called in reverse order: derived class destructor first, then base class.

Correct Answer: C — Using member initializer list

In C++, base class constructor is called using member initializer list: Derived() : Base() {}.

Correct Answer: B — Combination of two or more types

Hybrid inheritance combines multiple types of inheritance like hierarchical and multiple.

Correct Answer: B — Protected

In protected inheritance, public members of base class become protected in derived class.

Correct Answer: B — Prevents inheritance

A class declared as final cannot be inherited by any other class.

Correct Answer: C — Both base and derived objects

Base class pointer can point to both base and derived class objects (upcasting).

Correct Answer: C — Constructors

Constructors and destructors are not inherited; derived class must define its own.

Correct Answer: B — Changes access of inherited member

using Base::member can change the access level of inherited members in derived class.

Correct Answer: B — Base members + derived members

Size of derived class includes size of base class members plus derived class members.