Which of the statement are CORRECT ? (A) Constructors are invoked…

Answer: The correct statements are the following three statements from the question.

• Constructors are invoked automatically when the objects are created. — True. A constructor runs to initialize a new object at the moment the object is created.

• Constructors do not have return types, not even void and therefore they cannot return values. — True. Constructors are special initialization routines and are not declared with a return type.

• Constructors cannot be inherited though a derived class can call the base class constructors. — Largely true in typical usage: constructors are not automatically inherited into derived classes, but a derived class can explicitly invoke base-class constructors to initialize the base part of the object.

Why the remaining statement is false:

• Constructors can be declared as virtual. — False. Constructors cannot be virtual. Virtual dispatch requires an already-constructed object and a virtual table; constructors are responsible for creating the object, so they cannot participate in virtual dispatch. Use virtual destructors when you need polymorphic destruction.

Note: Since C++11 there is a facility to inherit constructors explicitly using a using-declaration (for convenience), but constructors are not inherited by default. The intended meaning of the statement in typical exam contexts is that constructors are not inherited.