DPAT test2

What is the primary intent of the Adapter design pattern?

• a) To convert the interface of a class into another interface that clients expect
• b) To ensure that a class has only one instance and provide a global point of access to it
• c) To define an interface for creating objects without specifying their concrete classes
• d) To attach additional responsibilities to an object dynamically

What is the motivation behind the use of the Singleton design pattern?

• a) To allow an object to alter its behavior when its internal state changes
• b) To ensure that a class has only one instance and provide a global point of access to it
• c) To define a family of algorithms, encapsulate each one, and make them interchangeable
• d) To capture and externalize an object's internal state without violating its encapsulation

Which of the following is not a key term associated with the Factory Method design pattern?

• a) Target
• b) Deferred instantiation
• c) Parallel class hierarchy
• d) Factory of factories

Which of the following is not a key element of the Abstract Factory design pattern?

• a) Providing an interface for creating families of related dependent objects
• b) Specifying the concrete classes to be instantiated
• c) Allowing the system to be independent of how its products are created, composed, and represented
• d) Promoting loose coupling by keeping objects from referring to each other explicitly

What is the main purpose of the Decorator design pattern?

• a) To provide a unified interface to a set of interfaces in a subsystem
• b) To attach additional responsibilities to an object dynamically
• c) To use sharing to support a large number of fine-grained objects efficiently
• d) To define an object that encapsulates how a set of objects interact

Which design pattern addresses the problem of communication between classes in a program?

• a) Mediator
• b) Memento
• c) State
• d) Strategy

What is the main intent of the Memento design pattern?

• a) To allow an object to alter its behavior when its internal state changes
• b) To capture and externalize an object's internal state without violating its encapsulation
• c) To define a family of algorithms, encapsulate each one, and make them interchangeable
• d) To implement an algorithm in a method, deferring the definition of some steps to subclasses

Which design pattern promotes the "open/closed principle" of object-oriented design?

• a) Decorator
• b) Facade
• c) Flyweight
• d) Strategy

What is the primary intent of the State design pattern?

• a) To allow an object to alter its behavior when its internal state changes
• b) To define a family of algorithms, encapsulate each one, and make them interchangeable
• c) To implement an algorithm in a method, deferring the definition of some steps to subclasses
• d) To provide a unified interface to a set of interfaces in a subsystem

Which design pattern is used to change the algorithm that is used to carry out some task?

• a) Decorator
• b) Facade
• c) Strategy
• d) Template Method