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

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.

In which scenario would you typically apply the Observer design pattern?*1 pointWhen you need to notify multiple objects of a change in stateWhen you need to create different objects based on a conditionWhen you need to restrict instantiation of a class to one objectWhen you need to manage access to a resource

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 create multiple instances of a class.To ensure that a class can be inherited by other classes.To control access to class methods.

What is an instance of a specific class?

Which of the following type of class allows only one object of it to be created?