1. Which design pattern lets you define a new operation without changing the classes of the elements on which it operates? A) Visitor B) Command C) Decorator D) Chain of Responsibility 2. Which design pattern decouples the object that invokes the operation from the one that knows how to perform it? A) Command B) Strategy C) Visitor D) State 3. Which pattern to use when more than one object can handle a request and the handler is unknown? A) Chain of Responsibility B) State C) Visitor D) Command
1. Which design pattern lets you define a new operation without changing the classes of the elements on which it operates?
A) Visitor
B) Command
C) Decorator
D) Chain of Responsibility
2. Which design pattern decouples the object that invokes the operation from the one that knows how to perform it?
A) Command
B) Strategy
C) Visitor
D) State
3. Which pattern to use when more than one object can handle a request and the handler is unknown?
A) Chain of Responsibility
B) State
C) Visitor
D) Command
4. The Tic-Tack-Toe is a classical
A) Strategy
B) Visitor
C) Chain of Responsibility
D) Command
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