What is the primary purpose of a Singleton design pattern in software engineering?OptionsTo limit the number of instances of a class to one.To ensure that a class can be inherited by other classes.To control access to class methods.To create multiple instances of a class.

How does the Singleton pattern ensure that a class has only one instance?*1 pointBy providing a global variable that holds the instance.B and CBy using a static method to handle instance creation.By making the class constructor private.

Which design pattern is used to ensure a class has only one instance and provides a global point of access to that instance? Mark(3 Marks)(Choose one option)ObserverFactory MethodAbstract FactorySingleton

hat is the main advantage of using the Dependency Injection pattern in software design?To create a single-instance object that provides access to resourcesTo increase modularity and enable easier testing by decoupling object creation and object usageTo manage the flow of control between different application layersTo optimize the performance of an application by distributing workloads

What is the primary purpose of the Adapter pattern?*1 pointTo ensure that a class has only one instance and provide a global point of access to it.To allow for two incompatible interfaces to work together without modifying their source code.To encapsulate a group of individual factories with a common goal.To define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.

public class Singleton<T> { public static T getInstance() { if (instance == null) instance = new Singleton<T>(); return instance; } private static T instance = null;}