JavaScript MCQ Javascript Classes MCQ

• A sets = sets.AbstractEnumerableSet.extend();
• B sets.SingletonSet = sets.AbstractEnumerableSet.extend(
• C sets.SingletonSet = sets.extend(
• D sets = sets.extend(
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B

Answer: B

"A singleton is a type of object that can only be created once. The extend keyword is used to create a child class from a parent class in class declarations or expressions.
In this case, the sets object serves as the namespace for the module, and the set classes are defined as properties of this object

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