What is Builder pattern?
- A design pattern that allows the creation of objects without specifying the exact class of object that will be created
- A design pattern that helps to create objects in a step-by-step manner, allowing for more control over the object creation process
- A design pattern that helps to reduce the number of objects in the system, making it more efficient
- A design pattern that promotes the loose coupling between objects, making the system easier to maintain and extend
Builder pattern is a design pattern that helps to create objects in a step-by-step manner, allowing for more control over the object creation process. This pattern separates the construction of a complex object from its representation, allowing for the same construction process to create different representations.
What is the MVC pattern?
- A behavioral design pattern that lets you pass requests along a dynamic chain of receivers until one of them handles it.
- A creational design pattern that uses factory methods to deal with the problem of creating objects without specifying the exact class of object that will be created.
- A software architecture pattern that separates the representation of information from the user's interaction with it. The pattern defines three main components: the Model, the View, and the Controller.
- A structural design pattern that allows you to compose objects into tree structures to represent part-whole hierarchies.
A software architecture pattern that separates the representation of information from the user's interaction with it. The pattern defines three main components: the Model, the View, and the Controller.
What is the purpose of the Memento pattern?
- To create complex objects step by step, using a builder object to abstract the process of creating the object
- To provide a common interface for a group of related classes
- To provide a mechanism for saving and restoring an object's internal state without violating encapsulation
- To provide a simplified interface to a complex system, hiding the complexity of the system behind a single interface
The Memento pattern provides a mechanism for saving and restoring an object's internal state without violating encapsulation
What is the purpose of the Business Delegate pattern?
- To create objects with complex behavior.
- To define a default behavior for an object.
- To encapsulate business logic and provide a clean API for clients.
- To manage the lifecycle of objects.
The Business Delegate pattern aims to encapsulate complex business logic and provide a clean API for clients to access it, reducing coupling between the client and business logic.
Name the actor classes used in Observer pattern.
- ConcreteObserver, Subject, Observer
- Observer, ConcreteObserver, Subject
- Subject, Observer, ConcreteObserver
- Subject, Observer, ConcreteSubject
The actor classes used in the Observer pattern are: Subject, Observer, and ConcreteObserver. The Subject class is responsible for maintaining a list of its dependents and notifying them of changes to its state. The Observer class is an abstract class that defines the interface for updating dependents. The ConcreteObserver class is a concrete implementation of the Observer class, responsible for updating its state in response to changes to the subject's state.
What is the difference between the Strategy and Template patterns?
- The Strategy pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable. The Template pattern defines the skeleton of an algorithm in a method, deferring some steps to subclasses.
- The Strategy pattern defines the skeleton of an algorithm in a method, deferring some steps to subclasses, while the Template pattern defines a family of algorithms and makes them interchangeable.
- The Template pattern is used to allow for loose coupling between the sender of a request and its receivers, while the Strategy pattern provides a unified interface to a set of interfaces in a subsystem.
- The Template pattern is used to convert the interface of a class into another interface clients expect, while the Strategy pattern allows sending requests to objects without knowing anything about the operation being requested or the receiver of the request.
The Strategy pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable, while the Template pattern defines the skeleton of an algorithm in a method, deferring some steps to subclasses.
Explain what is Composition over Inheritance?
- Composition over Inheritance is a design principle that eliminates the use of composition for code reuse.
- Composition over Inheritance is a design principle that eliminates the use of inheritance for code reuse.
- Composition over Inheritance is a design principle that favors class inheritance over object composition for code reuse.
- Composition over Inheritance is a design principle that favors object composition over class inheritance for code reuse.
Composition over Inheritance is a design principle that favors object composition over class inheritance for code reuse. It allows for greater flexibility and maintainability in code design.
What is the difference between the Factory and Abstract Factory patterns?
- None of the above
- The Factory and Abstract Factory patterns are the same
- The Factory pattern creates objects of a single class, while the Abstract Factory pattern creates objects of several classes
- The Factory pattern creates objects of several classes, while the Abstract Factory pattern creates objects of a single class
The Factory pattern creates objects of a single class, while the Abstract Factory pattern creates objects of several classes
What is Data Access Object (DAO) pattern?
- A design pattern to handle communication between objects
- A design pattern to handle the database connections
- A design pattern to manage complex state transitions
- A design pattern to provide a unified interface to a set of interfaces
The DAO pattern provides a unified interface to a set of data sources. It separates the data persistence mechanism from the business logic, allowing the data to be accessed and modified easily and efficiently.
What is the difference between the Singleton and Prototype patterns?
- The Singleton pattern allows multiple instances to be created from a single prototype object, while the Prototype pattern ensures that a class has only one instance and provides a global point of access to that instance.
- The Singleton pattern ensures that a class has multiple instances, while the Prototype pattern allows only one instance to be created from a single prototype object.
- The Singleton pattern ensures that a class has only one instance and provides a global point of access to that instance, while the Prototype pattern allows multiple instances to be created from a single prototype object.
- The Singleton pattern ensures that a class has only one instance, while the Prototype pattern ensures that a class has multiple instances with unique characteristics.
The Singleton pattern ensures that a class has only one instance and provides a global point of access to that instance, while the Prototype pattern allows multiple instances to be created from a single prototype object.