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JavaScript Data Types and Operators Quiz

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JavaScript Data Types and Operators Quiz

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Questions and Answers

Which of the following is NOT a data type in JavaScript?

String

Float (correct)

Boolean

Object

What does the '=== operator' in JavaScript do?

Checks if two values are equal in type, but not necessarily in value

Checks if two values are equal in value and type (correct)

Checks if two values are equal in value, but not necessarily in type

What is the purpose of the 'querySelector' method in JavaScript?

To select the first element that matches a specified CSS selector (correct)

To select a random element that matches a specified CSS selector

To select all elements that match a specified CSS selector

To select the last element that matches a specified CSS selector

Study Notes

JavaScript Fundamentals

JavaScript has several data types, but Symbol is not one of them (available data types include Number, String, Boolean, Null, Undefined, Object, and Array).

Comparator Operators

The '===' operator in JavaScript is a strict equality operator, which checks both the value and data type of two variables for equality.

Document Object Model (DOM) Methods

The 'querySelector' method in JavaScript returns the first element within a document that matches the specified selector or group of selectors.

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Description

Test your knowledge of JavaScript with this quiz! Find out if you can identify which data type is NOT recognized in JavaScript. Learn what the '===' operator does and how it differs from other comparison operators. Understand the purpose of the 'querySelector' method and how it can be used in JavaScript programming.