Answer Posted / naresh
In software engineering, a design pattern is a general
reusable solution to a commonly occurring problem in
software design. A design pattern is not a finished design
that can be transformed directly into code. It is a
description or template for how to solve a problem that can
be used in many different situations. Object-oriented
design patterns typically show relationships and
interactions between classes or objects, without specifying
the final application classes or objects that are involved.
Design patterns reside in the domain of modules and
interconnections. At a higher level there are Architectural
patterns that are larger in scope, usually describing an
overall pattern followed by an entire system.[1]
Abstract Factory
Builder
Factory Method
Prototype
Singleton
Adapter
Bridge
Composite
Facade
Flyweight
Proxy
Chain of responsibility
Command
Interpreter
Iterator
Mediator
Memento
Observer
State
Strategy
Template method
Visitor
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