Software Engineering, unit: Common Design Patterns. 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.
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- What is a design pattern, in software engineering?
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A general, reusable solution to a commonly occurring software design problem- What is the Model-View-Controller (MVC) pattern?
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A pattern separating data (Model), display (View), and control logic (Controller)- What is the Singleton pattern used for?
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Ensuring a class has only one instance, accessible globally- What is the Factory Method pattern?
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A pattern that delegates object creation to subclasses or a dedicated method- What is the Observer pattern used for?
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Notifying dependent objects automatically when a subject's state changes- What is the Strategy pattern used for?
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Selecting an algorithm's behavior at runtime from a family of interchangeable options- What is the Decorator pattern used for?
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Adding responsibilities to an object dynamically without modifying its class- What is the Facade pattern?
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A pattern providing a simplified interface to a complex subsystem- What is the Adapter pattern used for?
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Allowing incompatible interfaces to work together- What is the Command pattern?
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A pattern that encapsulates a request as an object, allowing it to be queued or undone- What is an anti-pattern?
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A common but ineffective or counterproductive solution to a recurring design problem- What is the God Object anti-pattern?
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A class that takes on too many responsibilities, becoming overly complex and tightly coupled- Why are design patterns valuable in team settings?
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They provide a shared vocabulary that speeds up communication and design decisions- What is the Repository pattern?
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A pattern that abstracts data access logic behind a consistent interface- What is the Builder pattern used for?
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Constructing a complex object step by step, separating the construction process from its final representation.
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