SOFTWARE DESIGN
DESIGN PATTERNS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bridge
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Mediator
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Observer
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Visitor
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Detailed explanation-1: -The Visitor pattern provides a maintainable, easy way to represent an operation to be performed on the elements of an object structure. The Visitor pattern lets you define a new operation without changing the classes of the elements on which it operates.
Detailed explanation-2: -UML Diagram First of all, the client uses a Visitor implementation and applies it to the object structure. The composite object iterates over its components and applies the visitor to each of them.
Detailed explanation-3: -In software design and engineering, the observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods.