JavaScript Data Types Mocktest

The value Infinity represents positive infinity in JavaScript and its data type is Number.

According to JavaScript naming conventions, variable names cannot start with a number. Therefore, 2ndVariable is not a valid variable name.

When typeof {} is evaluated, it returns the string 'object', indicating that an empty object literal {} has the data type Object in JavaScript.

The Function data type in JavaScript is used to represent functions, which are essentially reusable blocks of code.

In JavaScript, dividing a number by zero results in the special value Infinity, indicating an infinitely large number.

In JavaScript, the value 'null' enclosed in quotes is treated as a regular string, so its data type is String.

The Array data type in JavaScript is used to represent a list of elements, where each element can be of any data type, including other arrays or objects.

The typeof operator in JavaScript returns the data type of a variable or expression. In this case, typeof NaN will return the string 'number', indicating that NaN is considered a special numeric value in JavaScript rather than a distinct data type.

The Map data type in JavaScript is used to represent a collection of key-value pairs, where each key is unique and can be of any data type, and each value is associated with a key.