Software Architecture Design Mcqs

Page No. 44

Which of these states about Object Adapter pattern?


aThe adapter can inherit adapter operations with appropriate semantics and pragmatics, override those with inappropriate semantics or pragmatics, and add operations needed for the new interface

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bThe adapter may hold a reference to the adapter and delegate must work to the adapter object

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cAll of the mentioned

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dNone of the mentioned

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View Answer The adapter may hold a reference to the adapter and delegate must work to the adapter object

A class (the adapter class) may be given a new interface by an adapter class in which of these ways?


aClass Adapter pattern

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bObject Adapter pattern

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cAll of the mentioned

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done of the mentioned

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View Answer All of the mentioned

A class (the adapter class) may be given a new interface by an adapter class in which of the two ways?


aThe adapter may subclass the adapter. The adapter can inherit adapter operations with appropriate semantics and pragmatics, override those with inappropriate semantics or pragmatics, and add operations needed for the new interface. This is the Class Adapter pattern

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bThe adapter may hold a reference to the adapter and delegate must work to the adapter object. This approach is the Object Adapter pattern

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c All of the mentioned

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dNone of the mentioned

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View Answer All of the mentioned

The Adapter patterns provide object-oriented adapters in which of theses varieties?


aOne uses inheritance

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bone uses delegation

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cAll of the mentioned

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dNone of the mentioned

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View Answer All of the mentioned

Which of the following is true for Adapter pattern?


aAn adapter or wrapper is a component that provides a new interface for an existing component

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bAn Adapter or Wrapper pattern is a broker pattern that provides a new interface for existing software so that it can be reused

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cAdaptation for reuse is an old technique that has been used since the beginning of software development

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dAll of the mentioned

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View Answer All of the mentioned

Which of the following are true for the singleton class?


aSingleton classes should be used whenever it is important that only a single instance of a class exist and that that single instance be widely accessible

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bThe Singleton pattern can also be used, with slight modifications, when a limited number of instances greater than one are desired

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cAccess restrictions are usually easy to add by restricting the visibility of either the class or the factory method

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dAll of the mentioned

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View Answer All of the mentioned

What are the drawbacks for singleton class?


aMany languages do not allow classes to be values assignable to variables.

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bSingleton classes can be subclassed, and the singleton factory method can return a sub-class instance

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cClasses can easily replace only single instances

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dAll of the internship

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View Answer All of the internship

Which class that can have only one instance?


aAdaptor Class

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bProxy Class

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cSingleton Class

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dFactory class

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View Answer Singleton Class

What are the types of factory pattern?


aFactory Method

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bAbstract Method

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cAll of the mentioned

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dNone of the mentioned

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View Answer All of the mentioned

The Factory patterns decouple clients from products by taking advantage of interfaces in two ways?


a The generator class with the factory methods cannot be changed, disallowing variability in factory method implementations

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bInstances of a variety of classes that implement the product interface can be returned by a factory method, allowing great flexibility in results

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cAll of the mentioned

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dNone of the mentioned

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View Answer Instances of a variety of classes that implement the product interface can be returned by a factory method, allowing great flexibility in results

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