What is a reference to an object?

Why is unit testing harder in OOP than functional programming?

What is the function of a user diagram?

How do object behaviour and attributes differ?

The open/closed principle states that classes should be open for _ but closed for _.

Why would you override a method of a base class?

In general view, is this class definition valid?

In CPP, it is mandatory and must to initialize const variables.

Which of the above are false statements about Local class?

Classes in CPP are __________.

When a class is defined inside any function or block, it is called __________.