Design Patterns Online Quiz

Q 1 - Which of the following is correct about Creational design patterns.

A - These design patterns are specifically concerned with communication between objects.

B - These design patterns provide a way to create objects while hiding the creation logic, rather than instantiating objects directly using new opreator.

C - These design patterns concern class and object composition. Concept of inheritance is used to compose interfaces and define ways to compose objects to obtain new functionalities.

D - None of the above.

Q 2 - Which of the following describes the Bridge 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 is used when creation of object directly is costly.

D - This pattern is used when we need to decouple an abstraction from its implementation so that the two can vary independently.

Q 3 - Which of the following pattern is used when we need to decouple an abstraction from its implementation so that the two can vary independently?

A - Bridge Pattern

B - Adapter Pattern

C - Prototype Pattern

D - Filter Pattern

Q 4 - Which of the following pattern creates a chain of receiver objects for a request?

A - Proxy Pattern

B - Chain of Responsibility Pattern

C - Command Pattern

D - Interpreter Pattern

Q 5 - Which of the following describes the Iterator 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 restore state of an object to a previous state.

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.

Q 6 - Which of the following describes the Visitor pattern correctly?

A - In this pattern, a visitor class is used which changes the executing algorithm of an element class.

B - This pattern is used to separate application's concerns.

C - This pattern is used to decouple presentation tier and business tier.

D - This pattern is used in EJB persistence mechanism.

Q 7 - Which of the following pattern is used to to decouple presentation tier and business tier?

A - Visitor Pattern

B - MVC Pattern

C - Business Delegate Pattern

D - Composite Entity Pattern

Q 8 - Which of the following describes the Abstract Factory 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.

Q 9 - Which of the following pattern is used when we want to pass data with multiple attributes in one shot from client to server?

A - Factory Pattern

B - Abstract Factory Pattern

C - Singleton Pattern

D - Transfer Object Pattern

Q 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