The Most ESSENTIAL JavaScript Interview Questions (With Answers!)

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Chances are you are preparing for a JavaScript coding interview and now you're faced with a lot of different JS interview questions.

JavaScript is a high-level programming language, probably one of the most used programming languages in the world right now. It can be used to program the web browser or even servers.

To know the importance of JavaScript, disable JavaScript on your browser and try to load the Web Page in it. Those Web Pages will not work properly. Many contents in them may misbehave.

Usually, JavaScript interview questions are divided into three sections:

Beginner Level
Intermediate Level
Advanced Level

It works to make your interviewer position you inside of a scope of possible choices. The closer you are to an "advanced" level developer, the higher your chances of getting a job.

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1. Do you use es6? Why?
2. What is hoisting?
3. What is the Difference between synchrous and asynchronous?
4. What are the pros and cons of javascript?
5. Global vs local level scopes?
6. Why do we use "use strict" directive?
7. What is an iife?
8. What's your coding style?
9. Dot vs bracket notation?
10. How do you write clean code with javascript?

SUMMedia
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lol this hurt my ego a bit but I now have 8 tabs open looking to learn it all

izaakchater
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1:25 What is hoisting?
2:15 What is the difference between synchrous and asynchronous?
4:10 What are the pros and cons of Javascript?
4:50 Global vs block level scopes?
5:05 Why do we use "use strict" directive?
6:05 What is an IIFE?
6:25 What's your coding style?
7:10 Dot vs bracket notation?
7:25 How do you write clean code with Javascript?

shayanshaikh
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It says with answers — so where’s the answers?

PositiveVibesVids
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'use strict' is kinda old school.... now day people use TypeScript....

leomonz
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Thank you for this video. One of the most helpful interview videos I’ve watched.

JusticeTalksTech
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This is an excellent video. You are so calm and confident. Keep going with the videos I am actually an online English teacher and helping Polish with job interviews from general to technical. Russians, Ukrainians, Belarussians all struggle when the interview switches over to English. Stay strong and keep posting more videos.

nevillevandermerwe
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“Hoisting” is an advanced concept? Great! Maybe I’m not quite the bonehead I often think I am.

Tip: read Kyle Simpson to really _understand_ hoisting.

orangemancometh
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sold! Thank you for these. Very helpful!

luisalejo
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My self esteem left my body as a developer, as I couldn't answer most of them

mayankpant
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Question 10 is my favorite :) How do you write clean code with javascript?

tkimdev
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Hi any source for learning JavaScript in detail which covers everything from basics to advance?

audiable
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Do you ever ask questions about closures during interviews?

Spades
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disliked since you said with answers but didnt provide answers

aubame-bloodclut-zette
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do you have that face expression in interviews? :D like that, "impress me" face? D:D:D:D

adicide
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oh one more gay developer think he is too smart.

agentsmith