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23 Cards in this Set

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  • Back
Provides an interface for creating families of related or dependent objects without specifying their concrete classes.
Abstract Factory
Separates the construction of a complex object from its representation so that the same construction process can create different representations.
Defines an interface for creating an object, but lets subclasses decide which class to instantiate. Lets a class defer instantiation to subclasses.
Factory Method
Specifies the kinds of objects to create using an instance, and creates new objects by copying this instance.
Ensures a class has only one instance, and provides a global point of access to it.
Converts the interface of a class into another interface clients expect. Lets classes work together that couldn't otherwise because of incompatible interfaces.
Decouples an abstraction from its implementation so that the two can vary independently.
Composes objects into tree structures to represent whole-part hierarchies. This pattern lets clients treat individual objects and object compositions uniformly.
Attaches additional responsibilities to an object dynamically. Provides a flexible alternative to subclassing for extending functionality.
Provides a unified interface to a set of interfaces in a subsystem. Defines a higher-level interface that makes the subsystem easier to use.
Uses sharing to support large numbers of fine-grained objects efficiently.
Provides a surrogate or placeholder for another object to control access to it.
Avoids coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it.
Chain of Responsibility
Encapsulates a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations.
Given a language, define a representation for its grammar along with an ___________ that uses the representation to interpret sentences in the language.
Provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation.
Define an object that encapsulates how a set of objects interact. Promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently.
Without violating encapsulation, capture and externalize an object's internal state so that the object can be restored to this state later.
Defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
Allows an object to alter its behaviour when its internal _____ changes. The object will appear to change its class.
Defines a family of algorithms, encapsulates each one, and makes them interchangeable. Lets the algorithm vary independently from the clients that use it.
Defines the skeleton of an algorithm in an operation, deferring some steps to subclasses. Lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure.
Template Method
Represents an operation to be performed on the elements of an object structure. Lets you define a new operation without changing the classes of the elements on which it operates.