UVM | SV : Pure virtual method and Abstract/Virtual class.

What is Abstract class or Virtual class ?

• A class which is defined as virtual is called abstract class. A set of classes may be created that can be viewed as all beign derived from a common base class. An object of an abstract class shall not be constructed directly.

  What are Pure Virtual Methods in class ?

• A virtual method in an abstract class may be declared as a prototype without providing an implementation. This is called as pure together without providing a method body.
• A extended subclass may provide an implementation by overriding the pure virtual method with a virtual method having a method body.