A. Null type
B. Undefined type
C. Number type
D. All of the mentioned

Solution

D. All of the mentioned

Explanation

• Number: Represents both integer and floating-point numbers. Example: let num = 10;
• String: Represents a sequence of characters enclosed within single (' ') or double (" ") quotes. Example: let str = 'Hello';
• Boolean: Represents a logical value indicating true or false. Example: let isTrue = true;
• Undefined: Represents a variable that has been declared but not assigned a value. Example: let variable;
• Null: Represents the intentional absence of any value. Example: let value = null;
• Symbol: Represents a unique identifier, introduced in ES6. Example: let sym = Symbol('description');
• BigInt: Represents integers of arbitrary precision, introduced in ES10. Example: let bigNum = 1234567890123456789012345678901234567890n;

• Object: Represents a collection of key-value pairs, where keys are strings (or Symbols) and values can be any data type.