Creational Design Patterns
- Design Patterns - Factory Pattern
- Abstract Factory Pattern
- Design Patterns - Singleton Pattern
- Design Patterns - Builder Pattern
- Design Patterns - Prototype Pattern
Structural Design Patterns
- Design Patterns - Adapter Pattern
- Design Patterns - Bridge Pattern
- Design Patterns - Filter Pattern
- Design Patterns - Composite Pattern
- Design Patterns - Decorator Pattern
- Design Patterns - Facade Pattern
- Design Patterns - Flyweight Pattern
- Design Patterns - Proxy Pattern
- Chain of Responsibility Pattern
Behavioral Design Patterns
- Design Patterns - Command Pattern
- Design Patterns - Interpreter Pattern
- Design Patterns - Iterator Pattern
- Design Patterns - Mediator Pattern
- Design Patterns - Memento Pattern
- Design Patterns - Observer Pattern
- Design Patterns - State Pattern
- Design Patterns - Strategy Pattern
- Design Patterns - Template Pattern
- Design Patterns - Visitor Pattern
J2EE Design Patterns
- Design Patterns - Null Object Pattern
- Design Patterns - MVC Pattern
- Business Delegate Pattern
- Composite Entity Pattern
- Data Access Object Pattern
- Front Controller Pattern
- Intercepting Filter Pattern
- Service Locator Pattern
- Transfer Object Pattern
Design Patterns Useful Resources
Design Patterns Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Design Patterns Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Answer : A
Explanation
true. It is possible to get a clone of singleton object. Throw exception within the body of clone() method to prevent cloning.
Answer : A
Explanation
true. Each java application uses Runtime as a single object.
Q 3 - Which of the following pattern builds a complex object using simple objects and using a step by step approach?
Answer : A
Explanation
Builder Pattern builds a complex object using simple objects and using a step by step approach. This builder is independent of other objects.
Q 4 - Which of the following pattern allows a user to add new functionality to an existing object without altering its structure?
Answer : D
Explanation
Decorator Pattern allows a user to add new functionality to an existing object without altering its structure.
Q 5 - Which of the following describes the Mediator pattern correctly?
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.
Answer : B
Explanation
This pattern is used to reduce communication complexity between multiple objects or classes.
Q 6 - In which of the following pattern, a null object replaces check of NULL object instance?
Answer : B
Explanation
In Null Object pattern, a null object replaces check of NULL object instance.
Q 7 - Which of the following pattern is used to separate application's concerns?
Answer : B
Explanation
MVC pattern is used to separate application's concerns.
Q 8 - Which of the following describes the Abstract Factory pattern correctly?
Answer : B
Explanation
In Abstract Factory pattern, an interface is responsible for creating a factory of related objects without explicitly specifying their classes.
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?
Answer : D
Explanation
Transfer Object Pattern is used when we want to pass data with multiple attributes in one shot from client to server.
Q 10 - Which of the following is the correct list of entities of Composite Entity pattern?
A - Composite Entity, Coarse-Grained Object, Strategies
B - Composite Entity, Dependent Object, Strategies
C - Composite Entity, Coarse-Grained Object, Dependent Object, Strategies
D - Composite Entity, Coarse-Grained Object, Dependent Object
Answer : C
Explanation
Composite Entity, Coarse-Grained Object, Dependent Object, Strategies are the entities of Composite Entity Pattern.