What is a design pattern in the context of software engineering?

• A set of coding conventions

• A reusable solution to a common problem in software design

• A specific programming language syntax

• A detailed project plan

Which of the following is a creational design pattern?

• Singleton

• Observer

• Adapter

• Composite

Which pattern ensures a class has only one instance and provides a global point of access to it?

• Prototype

• Singleton

• Adapter

• Facade

Which design pattern is used to represent the dependency between objects to notify other objects when there is a state change?

• Observer

• Factory Method

• Decorator

• Command

In which design pattern do objects take on multiple responsibilities instead of specializing in one?

• Strategy

• Adapter

• Composite

• Facade

Which design pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes?

• Abstract Factory

• Builder

• Singleton

• Chain of Responsibility

Which structural design pattern allows objects with incompatible interfaces to work together?

• Adapter

• Decorator

• Proxy

• Composite

Which behavioral design pattern allows an object to alter its behavior when its internal state changes?

• Strategy

• State

• Observer

• Command

Which pattern is often used to provide a simplified interface to a complex subsystem?

• Adapter

• Facade

• Singleton

• Composite

Which design pattern encapsulates a request as an object, thereby allowing users to parameterize clients with queues, requests, and operations?

• Command

• Iterator

• Observer

• Memento