In JavaScript, what is the purpose of the typeof operator?OptionsTo create a new objectTo determine the type of a value or expressionTo check if a variable is definedTo convert a string to a number

What data type does typeof null return in JavaScript?

What is the output of typeof null in JavaScript?Options"null""object""undefined""string"

How can you check if a variable is an array in JavaScript?OptionsUsing the Array.isArray() methodUsing the isarray() functionUsing the isArray() methodUsing the typeof operator

What does the typeof operator return for an array?A. objectB. listC. collectionD. array

What is the purpose of the JavaScript Symbol data type?OptionsTo define custom data typesTo store binary dataTo represent unique values that can be used as object property keysTo create mathematical symbols