Design Patterns Exploration Quiz

1. Which design pattern provides a way to create objects while hiding the creation logic?

• Creational Design Patterns
• Structural Design Patterns
• Behavioral Design Patterns
• Representation Patterns

2. What is a primary characteristic of the Filter design pattern in software development?

• This pattern allows direct access to the objects` internal states without any criteria.
• This pattern enables developers to filter a set of objects using different criteria and chaining them in a decoupled way through logical operations.
• This pattern creates a single unified object from various inner objects with no conditions.
• This pattern requires objects to be tightly coupled to work together effectively.

3. Which design pattern allows for building complex objects in a step-by-step manner?

• Builder Pattern
• Strategy Pattern
• Singleton Pattern
• Observer Pattern

4. How does the Interpreter pattern function within programming languages?

• The Interpreter pattern manages memory allocation for programs.
• The Interpreter pattern formats user inputs for a database.
• The Interpreter pattern defines a grammatical representation for a language.
• The Interpreter pattern compresses data files for faster access.

5. What does the State pattern allow a class to do based on its current state?

• In this pattern, a class performance is enhanced at compile time.
• In this pattern, a class behavior changes based on its state.
• In this pattern, a class creates and deletes objects dynamically.
• In this pattern, a class manages multiple threads simultaneously.

6. What is the main role of the Visitor pattern in object-oriented programming?

• In this pattern, a strategy class encapsulates algorithms to change the behavior of an object.
• In this pattern, a command class is used to execute operations on different objects.
• In this pattern, a delegate class is used to manage the creation of objects.
• In this pattern, a visitor class is used to change the executing algorithm of an element class.

7. Which design pattern is specifically utilized in EJB persistence mechanisms?

• Composite Entity pattern
• Builder pattern
• Singleton pattern
• Factory pattern

8. How does the Service Locator pattern facilitate accessing various services?

• It eliminates the need for any service references.
• It enforces the use of static service methods only.
• It centralizes service access through a single interface.
• It requires direct references to all services.

9. What category do design patterns that hide object creation logic fall under?

• Structural Design Patterns
• Creational Design Patterns
• Behavioral Design Patterns
• Integration Design Patterns

10. What are the key entities involved in the Business Delegate pattern?

• Client, Business Service, DAO, Singleton
• Client, Service Locator, Data Access Object, Business Service
• Client, Business Delegate, LookUp Service, Business Service
• Client, LookUp Service, Observer, Service Locator

11. How would you define a design pattern within the context of software development?

• A programming language syntax
• A general reusable solution to a commonly occurring problem
• A specific fix for a unique issue
• A tool for code optimization

12. How many categories of design patterns are there in software engineering?

• 2
• 3
• 7
• 5

13. What is a significant advantage of implementing design patterns in development?

• Increased application size
• Reduced functionality
• Slower development process
• Improved code maintainability

14. Which of the following patterns is not classified as a creational design pattern?

• Factory Pattern
• Bridge Pattern
• Singleton Pattern
• Builder Pattern

15. Identify a design pattern that exemplifies behavioral characteristics.

• Factory Pattern
• Observer Pattern
• Singleton Pattern
• Builder Pattern

16. What is the main objective of the Bridge pattern in software design?

• The Bridge pattern creates a single instance of an object.
• The Bridge pattern separates an object’s interface from its implementation.
• The Bridge pattern composes objects into tree structures.
• The Bridge pattern reduces the number of objects in the application.

17. What does the Composite pattern aim to achieve in object management?

• The Composite pattern characterizes a collection of items that are handled the same way as a single instance of the same type of object.
• The Composite pattern aims to combine only uniform types into a single structure without hierarchy.
• The Composite pattern requires all objects to be separate without any common interface.
• The Composite pattern creates a unique object for each instance to ensure distinct properties.

18. What capability does the Decorator pattern provide in terms of functionality?

• Dynamically adds functionality to objects
• Restricts behavior to predefined types
• Simplifies object creation
• Forces a single instance of an object

19. How does the Facade pattern simplify interfacing with subsystems?

• The Facade pattern requires multiple access points to connect with subsystems.
• The Facade pattern provides a unified interface to a set of interfaces in a subsystem.
• The Facade pattern hides subsystems by completely removing their functionalities.
• The Facade pattern complicates the interface with multiple endpoints and methods.

20. What is the Flyweight pattern primarily used for in applications?

• The Flyweight pattern minimizes memory use by sharing common parts of state across multiple objects.
• The Flyweight pattern facilitates the upgrade process of various application components.
• The Flyweight pattern enhances security by encrypting data within objects.
• The Flyweight pattern is used to manage database connections for applications effectively.

21. What is the purpose of the Proxy design pattern in object-oriented systems?

• The Proxy pattern encapsulates unrelated functionalities in a single class.
• The Proxy pattern acts as a surrogate or placeholder for another object.
• The Proxy pattern directly manipulates the object`s data and functions.
• The Proxy pattern creates multiple instances of an object to enhance performance.

22. How does the Chain of Responsibility pattern enhance decoupling in software?

• The Chain of Responsibility pattern mandates that all handlers must always process requests.
• The Chain of Responsibility pattern allows request handling by passing it through a series of handlers.
• The Chain of Responsibility pattern requires tightly coupled handlers for efficient processing.
• The Chain of Responsibility pattern only works with synchronous request processing.

23. What transformation does the Command pattern facilitate regarding requests?

• The Command pattern transforms a request into an independent object.
• The Command pattern simplifies complex algorithms into one step.
• The Command pattern encrypts requests for secure transmission.
• The Command pattern combines multiple requests into a single one.

24. In what way does the Interpreter pattern offer grammatical representation?

• The Interpreter pattern uses a single grammar to execute commands.
• The Interpreter pattern defines a grammatical representation for a language.
• The Interpreter pattern creates graphical representations for language syntax.
• The Interpreter pattern memorizes previous language instructions for quick recall.

25. How does the Mediator pattern contribute to the decoupling of objects?

• The Mediator pattern binds objects tightly together for efficient communication.
• The Mediator pattern requires direct communication between all objects involved.
• The Mediator pattern eliminates the need for central control in object communication.
• The Mediator pattern enables decoupling of objects by introducing a layer in between so that the interaction between objects happen via the layer.

26. What functionality does the Memento pattern offer during runtime?

• The Memento pattern restores an object`s state at runtime.
• The Memento pattern creates objects at compile time.
• The Memento pattern generates data from a remote service.
• The Memento pattern merges different objects into one.

27. How does the Strategy pattern encapsulate algorithms within software design?

• The Strategy pattern requires all algorithms to be defined in a single class with no interface.
• The Strategy pattern uses a single algorithm that cannot be changed at runtime.
• The Strategy pattern combines multiple classes into one large class to simplify algorithms.
• The Strategy pattern encapsulates a family of algorithms into distinct classes that each implement a common interface.

28. What does the Template Method pattern define concerning algorithms structure?

• The Template Method pattern defines a way to execute methods in parallel without structure.
• The Template Method pattern defines concrete classes only without extensibility.
• The Template Method pattern defines an algorithm`s structure while allowing subclasses to define specific implementation details.
• The Template Method pattern defines interfaces that must be implemented by the client.

29. What use case best describes the Visitor pattern`s implementation?

• In this pattern, classes are designed to perform specific, unrelated tasks independently.
• In this pattern, all behaviors are encapsulated within a single class.
• In this pattern, a visitor class is used which changes the executing algorithm of an element class.
• In this pattern, objects are created based on a specific class hierarchy only.

30. Can you list the different types of Creational Design Patterns?

• Factory Method, Abstract Factory, Singleton Method
• Mediator Method, Command Method, Visitor Method
• Strategy Method, Chain Of Responsibility, Composite Method
• Observer Pattern, Proxy Method, Decorator Method