Design Patterns Quiz 3 | Englishfreetest.com

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  • Test content
    Question 1: In which of the following pattern, a visitor class is used which changes the executing algorithm of an element class?
    A. Visitor Pattern
    B. MVC Pattern
    C. Business Delegate Pattern
    D. Composite Entity Pattern
    Question 2: Which of the following pattern is used to restore state of an object to a previous state?
    A. Iterator Pattern
    B. Mediator Pattern
    C. Memento Pattern
    D. Observer Pattern
    Question 3: Which of the following describes the Mediator pattern correctly?
    A. This pattern is used to get a way to access the elements of a collection object in sequential manner without any need to know its underlying representation.
    B. This pattern is used to reduce communication complexity between multiple objects or classes.
    C. This pattern is used to reduce communication complexity between multiple objects or classes.
    D. This pattern is used when there is one-to-many relationship between objects such as if one object is modified, its depenedent objects are to be notified automatically
    Question 4: Which of the following describes the Prototype pattern correctly?
    A. This pattern builds a complex object using simple objects and using a step by step approach.
    B. This pattern refers to creating duplicate object while keeping performance in mind.
    C. This pattern works as a bridge between two incompatible interfaces.
    D. This pattern is used when we need to decouple an abstraction from its implementation so that the two can vary independently
    Question 5: Which of the following pattern a request is wrapped under an object as command and passed to invoker object?
    A. Proxy Pattern
    B. Chain of Responsibility Pattern
    C. Command Pattern
    D. Interpreter Pattern
    Question 6: Which of the following describes the Filter pattern correctly?
    A. This pattern builds a complex object using simple objects and using a step by step approach
    B. This pattern refers to creating duplicate object while keeping performance in mind
    C. This pattern enables developers to filter a set of objects using different criteria and chaining them in a decoupled way through logical operations
    D. This pattern is used when we need to decouple an abstraction from its implementation so that the two can vary independently
    Question 7: In which of the following pattern an interface is responsible for creating a factory of related objects without explicitly specifying their classes?
    A. Factory Pattern
    B. Abstract Factory Pattern
    C. Singleton Pattern
    D. Transfer Object Pattern
    Question 8: Which of the following describes the Singleton pattern correctly?
    A. This pattern creates object without exposing the creation logic to the client and refer to newly created object using a common interface
    B. In this pattern an interface is responsible for creating a factory of related objects without explicitly specifying their classes
    C. This pattern involves a single class which is responsible to create an object while making sure that only single object gets created
    D. This pattern is used when we want to pass data with multiple attributes in one shot from client to server
    Question 9: Which of the following describes the Facade pattern correctly?
    A. This pattern allows a user to add new functionality to an existing object without altering its structure
    B. This pattern is used where we need to treat a group of objects in similar way as a single object
    C. This pattern hides the complexities of the system and provides an interface to the client using which the client can access the system
    D. This pattern is primarily used to reduce the number of objects created and to decrease memory footprint and increase performance
    Question 10: Which of the following is the correct list of entities of Transfer Object pattern?
    A. Business Object , Transfer Object, Client
    B. Service, Context, Service Locator, Cache, Client
    C. Business Object , Client
    D. Service, Service Locator, Client