Design Patterns Part 1

A recurring theme, design, or arrangement that can be observed in various contexts.

A general, reusable solution to a commonly occurring software design problem.

Application and system design, abstractions on top of code, relationships between classes, and solving previously solved problems.

<p>Design patterns focus on low-level code, objects, and classes, while architecture styles focus on components and how they relate to each other.</p> Signup and view all the answers

<p>A design pattern that is ineffective and counterproductive.</p> Signup and view all the answers

<p>Ad hoc software structure that makes it difficult to extend and optimize code.</p> Signup and view all the answers

<p>Because they provide general, reusable solutions to commonly occurring software design problems.</p> Signup and view all the answers

<p>Design patterns focus on software design, while algorithms focus on specific implementations or classes.</p> Signup and view all the answers

<p>To write high-quality, maintainable, and scalable software</p> Signup and view all the answers

<p>A class should have only one reason to change, or only one responsibility.</p> Signup and view all the answers

<p>Software extensibility and maintainability</p> Signup and view all the answers

<p>Any instance of a derived class should be substitutable for an instance of its base class without affecting the correctness of the program.</p> Signup and view all the answers

<p>Code becomes difficult to understand, maintain, and extend.</p> Signup and view all the answers

<p>Developers can add new functionality without modifying the source code.</p> Signup and view all the answers

<p>Unexpected behavior, bugs, and maintainability issues can occur.</p> Signup and view all the answers

<p>Martin</p> Signup and view all the answers

<p>The advantages of using the Builder pattern include the ability to construct objects step-by-step, defer construction steps or run steps recursively, reusing the same construction code when building various representations of products, and isolating complex construction code from the business logic of the product.</p> Signup and view all the answers

<p>A disadvantage of using the Builder pattern is that it increases the overall complexity of the code, requiring the creation of multiple new classes.</p> Signup and view all the answers

<p>Unready code is put into production and is added to while still in an unfinished state.</p> Signup and view all the answers

<p>Obsessively applying a familiar tool to every software problem.</p> Signup and view all the answers

<p>The primary purpose of the Singleton pattern is to restrict the instantiation of a class to a single instance.</p> Signup and view all the answers

<p>You would use the Singleton pattern when it is important to ensure that a class is only instantiated once, and multiple instances would be unnecessary or problematic.</p> Signup and view all the answers

<p>To develop software, but their work is never done as they need to understand, maintain, and upgrade software.</p> Signup and view all the answers

<p>The Builder pattern helps to isolate complex construction code from the business logic of the product, adhering to the Single Responsibility Principle.</p> Signup and view all the answers

<p>They help anticipate change, target complex conditional logic, and provide a common language to communicate solutions with other developers.</p> Signup and view all the answers

<p>When there is a need to anticipate change or address complex conditional logic in software development.</p> Signup and view all the answers

<p>A key benefit of using design patterns is that they provide a proven, standardized solution to common design problems, making the design process more efficient and effective.</p> Signup and view all the answers

<p>It is a highly influential text in software design, written by the 'Gang of Four' in 1994.</p> Signup and view all the answers

<p>To provide guidelines for designing and developing software systems that are flexible, maintainable, and scalable.</p> Signup and view all the answers

<p>One class taking on too many responsibilities.</p> Signup and view all the answers

<p>To create smaller, more focused interfaces for specific use cases, rather than large interfaces that cover all possible methods.</p> Signup and view all the answers

<p>High-level modules should not depend on low-level modules, but both should depend on abstractions.</p> Signup and view all the answers

<p>Behavioural design patterns</p> Signup and view all the answers

<p>Object creation mechanisms</p> Signup and view all the answers

<p>No client should be forced to depend on methods it does not use.</p> Signup and view all the answers

<p>Abstractions reduce coupling between modules, increase modularity, and make the code easier to maintain, test, and extend.</p> Signup and view all the answers

<p>Concurrency design patterns</p> Signup and view all the answers

<p>Interfaces are more cohesive and less coupled.</p> Signup and view all the answers