What is the difference between the State and Strategy patterns?
- None of the above
- The State and Strategy patterns are the same
- The State pattern allows an object to alter its behavior when its internal state changes, while the Strategy pattern allows an object to change its behavior based on the context it is in
- The State pattern allows an object to change its behavior based on the context it is in, while the Strategy pattern allows an object to alter its behavior when its internal state changes
The State pattern allows an object to alter its behavior when its internal state changes, while the Strategy pattern allows an object to change its behavior based on the context it is in
What is the Visitor pattern?
- A behavioral design pattern that lets you pass requests along a dynamic chain of receivers until one of them handles it.
- A behavioral design pattern that separates an algorithm from an object structure on which it operates. The pattern allows you to define a new operation without changing the classes of the objects on which it operates.
- 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 structural design pattern that allows you to compose objects into tree structures to represent part-whole hierarchies.
A behavioral design pattern that separates an algorithm from an object structure on which it operates. The pattern allows you to define a new operation without changing the classes of the objects on which it operates.
What is Inversion of Control?
- A mechanism for managing dependencies between software components, such as libraries or services, that are required to run an application.
- A method of testing in which dependencies are replaced with mock objects to isolate the test subject from the rest of the system.
- A software design principle in which the flow of control of a system is inverted compared to the traditional approach. Instead of the system calling a component to perform a task, the component is notified when a task is ready and performs it. This leads to a more flexible and decoupled system, allowing for easier maintenance and testing.
- A technique for structuring software components into a tree-like hierarchy to organize dependencies and reduce coupling between components.
Inversion of Control is a design principle in which the flow of control in a system is inverted. Instead of a system calling components to perform tasks, components are notified when tasks are ready and perform them. This leads to a more flexible and decoupled system, allowing for easier maintenance and testing.
Name the actor classes used in Memento pattern.
- Caretaker, Originator, Memento
- Memento, Caretaker, Originator
- Originator, Caretaker, Memento
- Originator, Memento, Caretaker
The actor classes used in the Memento pattern are: Originator, Memento, and Caretaker. The Originator class is responsible for creating the memento and restoring its state. The Memento class is responsible for storing the internal state of the Originator. The Caretaker class is responsible for maintaining a list of mementos and providing the Originator with the appropriate memento at the appropriate time.
What is the Deadly Diamond of Death?
- The Deadly Diamond of Death is a situation in which a class has too many responsibilities and becomes overly complex.
- The Deadly Diamond of Death is a situation in which a class inherits from two classes with conflicting attributes.
- The Deadly Diamond of Death is a situation in which a class inherits from two classes with conflicting implementations of a method.
- The Deadly Diamond of Death is a situation in which multiple inheritance results in ambiguity and complexity in the inheritance hierarchy of a system.
The Deadly Diamond of Death is a situation in which multiple inheritance results in ambiguity and complexity in the inheritance hierarchy of a system. This can lead to difficulty in maintaining the system and understanding its behavior.
What is the difference between the Bridge and Filter patterns?
- The Bridge pattern allows for loose coupling between the sender of a request and its receivers, while the Filter pattern provides a unified interface to a set of interfaces in a subsystem.
- The Bridge pattern decouples an abstraction from its implementation, allowing the two to vary independently. The Filter pattern provides a way to filter requests that pass through a set of handlers.
- The Bridge pattern is used to create objects based on a blueprint, while the Filter pattern provides a way to convert the interface of a class into another interface clients expect.
- The Bridge pattern is used to filter requests that pass through a set of handlers, while the Filter pattern decouples an abstraction from its implementation.
The Bridge pattern decouples an abstraction from its implementation, allowing the two to vary independently, while the Filter pattern provides a way to filter requests that pass through a set of handlers.
What is Prototype pattern?
- A design pattern that creates objects by cloning existing objects, rather than creating new instances from scratch
- A design pattern that creates 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
Prototype pattern is a design pattern that creates objects by cloning existing objects, rather than creating new instances from scratch. This pattern involves implementing a prototype interface, which is used to create a new instance of the object. The new instance is a copy of the existing object, with any changes made to the copy not affecting the original.
What is the difference between the Adapter and Bridge patterns?
- None of the above
- The Adapter and Bridge patterns are the same
- The Adapter pattern converts the interface of one class into another, while the Bridge pattern decouples an abstraction from its implementation, allowing the two to be varied independently
- The Adapter pattern decouples an abstraction from its implementation, while the Bridge pattern converts the interface of one class into another
The Adapter pattern converts the interface of one class into another, while the Bridge pattern decouples an abstraction from its implementation, allowing the two to be varied independently
What is the difference between the Template patterns and the Strategy pattern?
- Template patterns allow for the implementation of a specific algorithm to be swapped out at runtime, while Strategy patterns provide a set of steps to be followed in a defined order. Template patterns are meant to be composed, while Strategy patterns are meant to be subclassed.
- Template patterns and Strategy patterns are the same thing.
- Template patterns and Strategy patterns have no relationship to each other.
- Template patterns provide a set of steps to be followed in a defined order, while Strategy patterns allow for the implementation of a specific algorithm to be swapped out at runtime. Template patterns are meant to be subclassed, while Strategy patterns are meant to be composed.
The Template pattern provides a set of steps to be followed in a defined order, while the Strategy pattern allows for the implementation of a specific algorithm to be swapped out at runtime. Template patterns are meant to be subclassed, while Strategy patterns are meant to be composed.
What are Design Patterns?
- A coding style that emphasizes using a specific way of writing code to make it more maintainable and readable.
- A design principle that focuses on creating software that is aesthetically pleasing and easy to use.
- A methodology for software development that involves following a set of steps to develop software.
- A set of predefined solutions to common problems in software development that provide a common vocabulary and a standard way of thinking about a particular problem.
Design patterns are reusable solutions to common problems that arise in software development. They provide a common vocabulary and a standard way of thinking about a particular problem, making it easier for software developers to communicate and collaborate. Design patterns are not specific to any programming language and can be applied to different programming paradigms, including object-oriented programming.