CPP Object-Oriented Programming Concepts 2

Question 1

What is a constructor in OOP?

Accepted Answer

A special method called automatically when an object is created

Answer

A constructor is a special method invoked automatically upon object creation to initialize its state.

Question 2

Which design concept is described as 'favoring composition over inheritance'?

Accepted Answer

Building complex behavior by combining simpler objects rather than extending class hierarchies

Answer

Favoring composition means assembling objects with desired behaviors rather than relying on deep inheritance chains, improving flexibility.

Question 3

What is a 'static' method in OOP?

Accepted Answer

A method belonging to the class rather than any instance

Answer

Static methods belong to the class itself and can be called without creating an instance of the class.

Question 4

What is the role of the 'this' keyword in OOP languages?

Accepted Answer

Refers to the current object instance

Answer

'this' is a reference to the current object instance, used to differentiate instance variables from local variables.

Question 5

What is the purpose of a destructor or finalizer in OOP?

Accepted Answer

To perform cleanup operations before an object is garbage collected or destroyed

Answer

Destructors/finalizers release resources like file handles or memory allocations when an object is about to be destroyed.

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