It is a type of pattern defines as one-to-many dependency between objects so that when one object changes state, all of its dependents are notified and updated automatically.

None of the Choices
Observer Pattern Correct
Singleton Pattern
Decorator Pattern

Similar CS-6203 questions

It is a type of pattern that provides a way to access the elements of an aggregate object sequential...
It is the solutions to common software design problems that occur over and over in software developm...
It is a type of pattern that attaches additional responsibilities to an object dynamically. This pat...
It is define as a family of algorithms, encapsulates each one and makes them interchangeable. This l...
It is a type of pattern that ensures a class has only one instance and provide a global access point...
It is common to all the instances (or objects) of the class because it is a class level variable.