Object-Oriented Programming, unit: Design Patterns Basics. Core concepts, terminology, and worked-example cues a college student meets for this unit, building on prior units without repeating them. Front: a term, concept, or short problem cue. Back: the definition, explanation, or answer.
38 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a design pattern?
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A general, reusable solution to a commonly occurring problem in software design- What is the Singleton pattern?
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A pattern ensuring a class has only one instance and provides a global point of access to it- What is the Factory pattern?
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A pattern that creates objects without specifying their exact class in the calling code- What is the Observer pattern?
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A pattern where objects (observers) are notified automatically when a subject's state changes- What is the Strategy pattern?
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A pattern that defines a family of interchangeable algorithms and selects one at runtime- What is the Decorator pattern?
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A pattern that adds behavior to an object dynamically without altering its class- What is the Adapter pattern?
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A pattern that allows incompatible interfaces to work together by wrapping one in another- What is the Builder pattern?
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A pattern that separates complex object construction from its final representation- What is the Model-View-Controller (MVC) pattern?
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A pattern separating an application into data (Model), display (View), and logic (Controller)- Why are design patterns useful?
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They provide proven, well-understood solutions and a shared vocabulary among developers- What is a creational design pattern?
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A pattern concerned with object creation mechanisms, like Singleton or Factory- What is a structural design pattern?
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A pattern concerned with composing classes and objects into larger structures, like Adapter- What is a behavioral design pattern?
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A pattern concerned with communication and responsibility between objects, like Observer- What problem does the Singleton pattern risk introducing?
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Global state that can make testing and reasoning about code more difficult- Who are the 'Gang of Four' (GoF)?
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The four authors (Gamma, Helm, Johnson, Vlissides) of the 1994 book that cataloged 23 classic design patterns.
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