What are the JavaScript questions asked in interview?

What are the JavaScript questions asked in interview?

Commonly asked JavaScript Interview Questions | Set 1

  • What is JavaScript(JS)?
  • What are the features of JavaScript?
  • What are the advantages of JavaScript?
  • Why is javascript called Richer Interface?
  • Is javascript case-sensitive?
  • How can we create an object in JS?
  • How can we read the properties of an object in js?

What is JavaScript short answer?

JavaScript is a scripting language. It is different from Java language. It is object-based, lightweight, cross-platform translated language. It is widely used for client-side validation. The JavaScript Translator (embedded in the browser) is responsible for translating the JavaScript code for the web browser.

How do I prepare for JavaScript interview?

How to prepare for JavaScript interviews

  1. Step 1: Know what you need to study. You already know what programming language you will be using, so now you need to research what aspects of that language will be tested.
  2. Step 2: Make a plan.
  3. Step 3: Don’t forget the behavioral interview.

Is JavaScript okay for interviews?

Doing an interview in JavaScript offers you 2 main advantages: The syntax is simple, intuitive, and easy to grasp — rather than spending the time remembering how to declare an array, you can spend more time thinking about the logic for your solution.

What would be the result of 3 2 7 in JavaScript?

What would be the result of 3+2+”7″? Since 3 and 2 are integers, they will be added numerically. And since 7 is a string, its concatenation will be done. So the result would be 57.

What is promise in JavaScript?

The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value.

What are promises in JavaScript?

A promise is an object that may produce a single value some time in the future : either a resolved value, or a reason that it’s not resolved (e.g., a network error occurred). A promise may be in one of 3 possible states: fulfilled, rejected, or pending.

What type of language is JavaScript?

JavaScript (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, and is best known as the scripting language for Web pages, but it’s used in many non-browser environments as well.

What is object in JavaScript?

In JavaScript, an object is a standalone entity, with properties and type. Compare it with a cup, for example. A cup is an object, with properties. A cup has a color, a design, weight, a material it is made of, etc. The same way, JavaScript objects can have properties, which define their characteristics.

Is JavaScript good for coding?

JavaScript is intuitive for a beginner just learning to code and a great vehicle to teach students the principles of Computer Science. Whether you’re planning on eventually being a front-end or back-end developer, there’s no doubt that JavaScript is the best coding language to learn for beginners.

What is the best language for coding interviews?

C. C is positioned at #1 with 13.83% ratings, followed by Python, Java, and C++. C, Python, and Java make for a good combination of languages to build a solid coding foundation. Being developed in the 70s, C forms the basis of many new languages such as Python and Ruby.

What is Arrow function in JavaScript?

Arrow function is one of the features introduced in the ES6 version of JavaScript. It allows you to create functions in a cleaner way compared to regular functions. For example, This function // function expression let x = function(x, y) { return x * y; }

What are some good interview questions for JavaScript?

Here are some in-depth questions about using JavaScript: Define a scripting language and how it differs from other languages. Write a piece of code in JavaScript. Correct a piece of code in JavaScript. Explain what a spread operator in JS is. How can you remove duplicates from a JS array? What’s a Promise in JS?

Can you get a job as a JavaScript developer?

If you’ve been developing your JavaScript (JS) skills, you may be in the market for a new job as a JS developer. In this article, we’ll offer a comprehensive review of interview questions and answers to help aid in your job search.

What do you need to know about JavaScript?

JavaScript, also abbreviated as JS, is a high-level server-side programming language. JavaScript is widely used worldwide to build various web applications, which means there are huge opportunities for JavaScript programming. To build a JavaScript programming career, candidates need to crack the interview.

What are the advantages and disadvantages of using JavaScript?

Answer: There are several advantages to using JavaScript. Most notable amongst them are listed down as follows: Enhanced interactivity – JavaScript allows creating interfaces that react when the user activates them via the keyboard or merely hovers the cursor over the same.