{"id":8770,"date":"2019-02-22T16:58:22","date_gmt":"2019-02-22T16:58:22","guid":{"rendered":"https:\/\/www.monsterindia.com\/career-advice\/javascript-interview-questions-you-should-know-about-before-your-next-interview-8770\/"},"modified":"2021-12-30T12:36:01","modified_gmt":"2021-12-30T12:36:01","slug":"javascript-interview-questions-you-should-know-about-before-your-next-interview","status":"publish","type":"post","link":"https:\/\/www.foundit.my\/career-advice\/javascript-interview-questions-you-should-know-about-before-your-next-interview\/","title":{"rendered":"JavaScript Interview Questions you should know about before your next interview"},"content":{"rendered":"\n

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JavaScript was developed by Brendan Eich in 1995 and became an ECMA standard in 1997. JavaScript is now considered to be a principal vehicle for building strong Web applications. If you are attending an interview for a JavaScript position then these JavaScript Interview Questions may give you an indication of what to study before the interview.<\/span><\/p>\n\n\n\n

What is JavaScript?<\/strong> <\/span>
\u2022 It was created to give HTML pages interactivity. <\/span>
\u2022 It is a scripting language (a lightweight programming language). <\/span>
\u2022 Usually, it is placed straight into HTML pages and it is an interpreted language. <\/span>
\u2022 Everyone can use JavaScript without a license.<\/span><\/p>\n\n\n\n

JavaScript is a scripting language with a simple syntax. It will authenticate data before it is put forward to a server saving extra processing. JavaScript reveals the visitor\u2019s browser and loads another page depending on the browser. It also creates cookies and can store and get information on the visitor\u2019s computer.<\/span><\/p>\n\n\n\n

Explain What Is JavaScript. List data types supported by JavaScript.<\/strong> <\/span>
JavaScript is an object \u2013 concerned computer programming language used to design interactive effects within web browsers. It is first utilized by the Netscape browser that gives access to the HTML Document Object Model (DOM).<\/span><\/p>\n\n\n\n

Data types supported by JavaScript are: <\/span><\/strong>
\u2022 Undefined. <\/span>
\u2022 Null. <\/span>
\u2022 Boolean. <\/span>
\u2022 String. <\/span>
\u2022 Symbol. <\/span>
\u2022 Number. <\/span>
\u2022 Object.<\/span><\/p>\n\n\n\n

Explain Closures in JavaScript.<\/strong> <\/span>
Closures are the grouping of lexical function and environment in which the function was declared. This permits JavaScript programmers to write effective, concise, more creative and sensitive codes. The closure will be a combination of all the local variables that were in scope when the closure was created. <\/span><\/p>\n\n\n\n

JavaScript is a very function-adapted language which gives the user freedom to use functions.<\/span><\/p>\n\n\n\n

Explain JavaScript Event Delegation Model.<\/strong> <\/span>
When capturing and bubbling, event delegation allows functions to implement one single handler to many elements at one time. Event delegation allows you to add event listeners to a parent instead of specific nodes. The specific listener examines bubbled events to find a match on the child elements.<\/span><\/p>\n\n\n\n

What Are Global Variables?<\/strong> \u2013 It is a variable which has global scope and it is evident through the program unless shadowed.<\/span><\/p>\n\n\n\n

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