Ace Your C++ Skills 2026 – Rock the ‘Thinking in C++’ Challenge!

A This is incorrect because pure virtual functions cannot have any definition in the base class.

B: This is also incorrect because a pure virtual function can have a declaration with no definition in the base class.

C: While this may seem correct, it is not the most accurate answer. A pure virtual function can have a definition in a derived class, but it must also be overridden in any further derived classes.

D: This is the correct answer. A pure virtual function can have a definition in the base class, as long as it is not used to create objects of that class and is overridden in any further derived classes.