JavaScript test

JavaScript is a high-level programming language that is commonly used for creating dynamic and interactive websites. It was first created by Brendan Eich at Netscape Communications in 1995 and has since become one of the most widely used programming languages on the web.

JavaScript is often used for creating client-side applications that run in a web browser, but it can also be used for server-side programming with the help of Node.js. It is a versatile language that can be used for a wide range of purposes, from creating animations and interactive user interfaces to building complex web applications.

Some of the key features of JavaScript include its ability to manipulate the Document Object Model (DOM), which is the structure of a web page, and its support for asynchronous programming, which allows developers to create applications that can run multiple tasks simultaneously without blocking the user interface.

JavaScript is a dynamically typed language, which means that variables can hold values of any type, and its syntax is similar to that of other C-style programming languages such as C++, Java, and C#. It also has a large and active developer community, which has created many libraries and frameworks to simplify common tasks and extend its capabilities.

Overall, JavaScript is a powerful and flexible programming language that is essential for modern web development.

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Questions count: 23

Example of the test

What is the DOM in JavaScript?

What is the DOM in JavaScript?

A data type that stores text and numbers A programming interface for building user interfaces A representation of the HTML document in memory A collection of variables and functions

Which isn't supported by JavaScript?

Which data type is not supported by JavaScript?

Number String Boolean Character

What is the purpose of the "this" keyword in JavaScript?

What is the purpose of the "this" keyword in JavaScript?

To refer to the current HTML document To refer to the parent object or element To refer to the current JavaScript file To refer to the current object or element

What is an HTML attribute that can be used to trigger a JavaScript function?

What is an HTML attribute that can be used to trigger a JavaScript function?

onsubmit onhover onkeydown onclick

What are 2 syntax for declaring a variable in JavaScript? (you have to choose 2 options)

What are 2 syntax for declaring a variable in JavaScript? (you have to choose 2 options)

var variableName; variable variableName; const variableName; let variableName;