Saturday, January 24, 2015
punjabtechnicaluniversity.blogspot.in
Creational Patterns
Abstract Factory:- Creates an instance of several families of classes
Builder :- Separates object construction from its representation
Factory Method:- Creates an instance of several derived classes
Prototype:- A fully initialized instance to be copied or cloned
Singleton:- A class of which only a single instance can exist
Note :- The best way to remember Creational pattern is by ABFPS (Abraham Became First President of States).
Structural Patterns
Adapter:-Match interfaces of different classes.
Bridge:-Separates an object’s interface from its implementation.
Composite:-A tree structure of simple and composite objects.
Decorator :-Add responsibilities to objects dynamically.
Façade:-A single class that represents an entire subsystem.
Flyweight:-A fine-grained instance used for efficient sharing.
Proxy:-An object representing another object.
Note : To remember structural pattern best is (ABCDFFP)
Behavioral Patterns
Mediator:-Defines simplified communication between classes.
Memento:-Capture and restore an object's internal state.
Interpreter:-A way to include language elements in a program.
Iterator:-Sequentially access the elements of a collection.
Chain of Resp:-A way of passing a request between a chain of objects.
Command:-Encapsulate a command request as an object.
State:-Alter an object's behavior when its state changes.
Strategy:-Encapsulates an algorithm inside a class.
Observer:-A way of notifying change to a number of classes.
Template Method:-Defer the exact steps of an algorithm to a subclass.
Visitor:-Defines a new operation to a class without change.
Note :- Just remember Music....... 2 MICS On TV (MMIICCSSOTV).
Note :- This is advanced question because any one who says to list down all patterns can only be crazy for what he is asking.But its always a win-a-win situation for the interviewer. There are three basic classification of patterns Creational , Structural and Behavioral patterns.
Abstract Factory:- Creates an instance of several families of classes
Builder :- Separates object construction from its representation
Factory Method:- Creates an instance of several derived classes
Prototype:- A fully initialized instance to be copied or cloned
Singleton:- A class of which only a single instance can exist
Note :- The best way to remember Creational pattern is by ABFPS (Abraham Became First President of States).
Structural Patterns
Adapter:-Match interfaces of different classes.
Bridge:-Separates an object’s interface from its implementation.
Composite:-A tree structure of simple and composite objects.
Decorator :-Add responsibilities to objects dynamically.
Façade:-A single class that represents an entire subsystem.
Flyweight:-A fine-grained instance used for efficient sharing.
Proxy:-An object representing another object.
Note : To remember structural pattern best is (ABCDFFP)
Behavioral Patterns
Mediator:-Defines simplified communication between classes.
Memento:-Capture and restore an object's internal state.
Interpreter:-A way to include language elements in a program.
Iterator:-Sequentially access the elements of a collection.
Chain of Resp:-A way of passing a request between a chain of objects.
Command:-Encapsulate a command request as an object.
State:-Alter an object's behavior when its state changes.
Strategy:-Encapsulates an algorithm inside a class.
Observer:-A way of notifying change to a number of classes.
Template Method:-Defer the exact steps of an algorithm to a subclass.
Visitor:-Defines a new operation to a class without change.
Note :- Just remember Music....... 2 MICS On TV (MMIICCSSOTV).
0 comments:
Post a Comment
North India Campus