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 a callback function in JavaScript?

What is a callback function in JavaScript?

A function that is executed after a set interval of time A function that is executed when a certain event occurs A function that is passed as an argument to another function A function that is used to handle errors in asynchronous cod

What is a JavaScript function?

What is a JavaScript function?

A block of code that performs a specific task A data type that stores text and numbers A type of loop that repeats a set of instructions A data structure that stores key-value pairs

(JavaScript) The purpose of the jQuery library?

What is the purpose of the jQuery library?

To simplify JavaScript code and provide cross-browser compatibility To provide a framework for building user interfaces To provide a database management system for web applications To provide a set of tools for building web applications

Which condition test if the number is even?

Which statement testing if the number is even?

if (myNumber > 2) { alert('Number is even') } if (myNumber / 2 * myNumber) { alert('Number is even') } if (myNumber % 2 === 0) { alert('Number is even') }

What is an API?

What is an API?

A programming interface for building user interfaces A set of rules and protocols for accessing a web-based software application A type of loop that repeats a set of instructions A data structure that stores key-value pairs

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