Design Patterns Online Quiz

Q 1 - Which of the following is correct about Behavioral 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 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.

Q 3 - Which of the following pattern is used when creation of object directly is costly?

A - Bridge Pattern

B - Adapter Pattern

C - Prototype Pattern

D - Filter Pattern

Q 4 - Which of the following pattern provides a way to evaluate language grammar or expression?

A - Proxy Pattern

B - Chain of Responsibility Pattern

C - Command Pattern

D - Interpreter Pattern

Q 5 - Which of the following describes the State pattern correctly?

A - In this pattern, a class behavior changes based on its state.

B - In this pattern, a null object replaces check of NULL object instance.

C - In this pattern, a class behavior or its algorithm can be changed at run time.

D - In this pattern, an abstract class exposes defined way(s)/template(s) to execute its methods.

Q 6 - In which of the following pattern, a class behavior changes based on its state?

A - State Pattern

B - Null Object Pattern

C - Strategy Pattern

D - Template Pattern

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 pattern is used when we want to locate various services using JNDI lookup?

A - DAO Pattern

B - Front Controller Pattern

C - Intercepting Pattern

D - Service Locator Pattern

Q 9 - Which of the following describes the J2EE pattern correctly?

A - This type of patterns provide a way to create objects while hiding the creation logic, rather than instantiating objects directly using new opreator

B - This type of patterns concern class and object composition. Concept of inheritance is used to compose interfaces and define ways to compose objects to obtain new functionalities.

C - This type of pattern are specifically concerned with communication between objects.

D - This type of pattern are specifically concerned with the presentation tier.

Q 10 - In MVC pattern, Model represents an object or JAVA POJO carrying data. It can also have logic to update controller if its data changes.

A - true

B - false