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.
Question
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.
Solution
The Singleton pattern ensures that a class has only one instance by using a combination of a private constructor and a static method.
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Making the class constructor private: This prevents other classes from instantiating it. This is the key step in implementing Singleton pattern as this ensures that the class cannot be instantiated from outside the class.
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Using a static method to handle instance creation: This static method will create a new instance of the class if one does not exist. If an instance already exists, it simply returns a reference to that object. By doing so, this method ensures that we don't end up creating multiple instances of the class.
So, the correct answer is "B and C".
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