- Design Patterns Tutorial
- Design Patterns - Home
- Design Patterns - Overview
- Design Patterns - Factory Pattern
- Abstract Factory Pattern
- Design Patterns - Singleton Pattern
- Design Patterns - Builder Pattern
- Design Patterns - Prototype Pattern
- 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
- 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 - Null Object Pattern
- Design Patterns - Strategy Pattern
- Design Patterns - Template Pattern
- Design Patterns - Visitor 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 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.
Q 1 - Which of the following is correct about Behavioral design patterns.
A - These design patterns are specifically concerned with communication between objects.
Answer : A
Explanation
Behavioral design patterns are specifically concerned with communication between objects.
Q 2 - If we serialize a singleton object and deserialize it then the result object will be same.
Answer : B
Explanation
false. Deserializing a serialized object will yield a different object.
Q 3 - Which of the following describes the Flyweight pattern correctly?
Answer : C
Explaination
This pattern is primarily used to reduce the number of objects created and to decrease memory footprint and increase performance.
Q 4 - Which of the following describes the Command pattern correctly?
A - In this pattern a class represents functionality of another class.
B - This pattern creates a chain of receiver objects for a request.
C - This pattern provides a way to evaluate language grammar or expression.
D - In this pattern a request is wrapped under an object as command and passed to invoker object.
Answer : D
Explanation
Command pattern is a data driven design pattern and falls under behavioral pattern category. A request is wrapped under an object as command and passed to invoker object. Invoker object looks for the appropriate object which can handle this command and passes the command to the corresponding object which executes the command.
Q 5 - Which of the following pattern is used to reduce communication complexity between multiple objects or classes?
Answer : B
Explanation
Mediator pattern is used to reduce communication complexity between multiple objects or classes.
Q 6 - Which of the following describes the Visitor pattern correctly?
B - This pattern is used to separate application's concerns.
C - This pattern is used to decouple presentation tier and business tier.
Answer : A
Explanation
In Visitor pattern, a visitor class is used which changes the executing algorithm of an element class.
Q 7 - Which of the following pattern is used to to decouple presentation tier and business tier?
Answer : C
Explanation
Business Delegate pattern is used to decouple presentation tier and business tier.
Q 8 - Which of the following describes the Singleton pattern correctly?
Answer : C
Explanation
Singleton involves a single class which is responsible to create an object while making sure that only single object gets created.
Q 9 - Which type of design patterns are specifically concerned with communication between objects?
A - Creational Design Patterns
Answer : C
Explanation
Behavioral Design Patterns are specifically concerned with communication between objects.
Q 10 - Which of the following is the correct list of entities of Business Delegate pattern?
A - Business Delegate, LookUp Service, Business Service
B - Client, Business Delegate, LookUp Service, Business Service
Answer : B
Explanation
Client, Business Delegate, LookUp Service, Business Service are the entities of Business Delegate Pattern.
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