React Interview Questions and Answers - Dominate Your Next Interview

► Full React Interview Prep Course - monsterlessons-academy.com/co...
In this video I want to share with you React interview questions and answers that you should know if you want to pass an interview as a React developer. We will talk about how React works, what it's pros and cons, how it uses Virtual DOM, functional and class components, sharing data between components and much more.
TIMESTAMPS
00:00 - Introduction
00:22 - Course introduction
01:22 - Pros and Cons of React
03:41 - How to create React application?
05:39 - What is virtual DOM?
08:45 - What is JSX?
10:14 - Why do we use className and not class?
11:24 - What are functional components and props?
15:12 - What are class components, props and state?
20:28 - What are dumb vs smart components?
22:05 - What is a key index map?
25:35 - What is React.Fragment?
29:31 - What is conditional rendering in React?
34:24 - How to apply styles in React?
40:48 - How parent child communication is working in React?
45:23 - Outro
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[@ky8designs]

Thank you so much for uploading this, your past Angular interview questions helped me to Ace all the questions 🙏

[@MonsterlessonsAcademy]

Glad it was helpful!

[@MrPankoPanko]

Excellent material! Looking forward to a similar video about Angular!

[@MonsterlessonsAcademy]

Here it is kzbin.info/www/bejne/a3LCin6ii7yAhtEsi=Yom6_IrTzrQZKkDV

[@g_pazzini]

Awesome video ❤

[@Localhost3001]

You explain things in a very nice and clean way ✌️ thank you for this vid

[@MonsterlessonsAcademy]

Glad it was helpful!

[@SamipShresthajava]

Great course! Easy to grasp even for beginner. Thank you!

[@MonsterlessonsAcademy]

Glad it was helpful!

[@MUGGER_NUGGETS]

The BEST React Interview video - on my way to purchase some courses. Thanks Monsterlessons 👍

[@MonsterlessonsAcademy]

Awesome, thank you!

[@captainnoyaux]

Thank you for your amazing work !

[@MonsterlessonsAcademy]

Glad you enjoy it!

[@CamdenBloke]

The fact that most of these I knew what to say before your explanation I think is good for me. It's still useful to get used to using the language. For example, to use the term 'DOM nodes' when talking about Fragment, instead of awkwardly saying that I don't want to wrap everything in a Div.

[@MonsterlessonsAcademy]

Glad it help!

[@akshaychavan5511]

Appreciate your hard work 🙌

[@MonsterlessonsAcademy]

Thank you so much 😀

[@janewaguthi4342]

awesome , you got a new subscriber🥳

[@MonsterlessonsAcademy]

Thanks for subbing!

[@damianodamian7907]

Hello Oleksandr, I really love the way you explain stuffs, thank you so much for your videos! You're really good at teaching :) I think there's a little inaccuracy at 41:18 "we destructure instead of destroy..."

[@MonsterlessonsAcademy]

You are totally right!

[@MiraGenije]

Has anyone had an interview to share their experience with the rest of us? I can add a few questions from mine React interview: 1. What is pure function? 2. What are reducers and what kind of functions they use? 3, What is event loop? 4. What is IIEF, and how is that connected with closures in for loop? 5. Difference between let and var? 6. What happens with key and app when we remove one item from list? 7. What type of rendering do we have next to cliend-side and server-side? 8. What is server side rendering, and what is server side Component? 9. What is microservice architecture and how it's manifested in react app. 10. What does those 3 numbers in package.json dependency, next to package name (they talked about version), means? and what means ^ and ~? 11. What is usage of package-lock.json? should we put it in gitignore and why not? 12. Explain hoisting. 13. What is SPA and how routing works.. etc...

[@MonsterlessonsAcademy]

A lot of these questions are not about React but about JS or how web is working. Btw I covered JS related questions from this list in my Javascript interview questions course monsterlessons-academy.com/courses/javascript-interview-questions-coding-interview

[@MiraGenije]

@@MonsterlessonsAcademy Yes i totally agree, but that was for React position questions... Thanks, i'll check the course

[@0xVantwoutMaarten]

Great video! :) Pros of react, "it is the most popular front-end 'framework' in the world" :)

[@MonsterlessonsAcademy]

So true!

[@sgonzalezfx]

Very useful video😃

[@MonsterlessonsAcademy]

Thanks a lot 😊

[@codingispower1816]

I interview on Monday! Going to watch this and hopefully it helps me! Thank you.

[@MonsterlessonsAcademy]

Fingers crossed!

[@codingispower1816]

@@MonsterlessonsAcademy ❤️

[@vimalvs24]

​@@codingispower1816 hope you cracked your interview.

[@eyadsaher9503]

How did it go?

[@codingispower1816]

It went well! I am moving to the next round of more technicals probably next week!@@eyadsaher9503

[@OneworldKW]

Great content. I was told by the hiring manager to submit an assignment (easy level) with no deadline. I wonder what is a reasonable amount of time?

[@MonsterlessonsAcademy]

No idea.

[@adinamarasanu7487]

Does the full course contain React exercises, like the one for Javascript? Or it's just theory, like this demo?

[@MonsterlessonsAcademy]

It doesn't include creating of application or something like that. There are questions for you to answer and code answers when needed. You can see the list of all videos on the page of the course monsterlessons-academy.com/courses/react-interview-questions-coding-interview-course/

[@adinamarasanu7487]

@@MonsterlessonsAcademy Thank you! Yeah, I was thinking of little pieces of code with answers, the tricky ones :)) I took your "JS interview questions" course on Udemy and I think it's one of the best courses I have ever watched. Congrats!

[@MonsterlessonsAcademy]

@@adinamarasanu7487 Glad you like it. Also don't forget that you have a 30 days refund if you don't like my course for some reason.

[@matrixhasyou979]

You have mentioned Virtual DOM, but how about React fibers for today?)

[@MonsterlessonsAcademy]

This is one of the questions that I cover in the course. These are completely different things.

[@yuliasereda5671]

20:00 ComponentDidMount its not a hook its a method. As i know classes don't use hooks.

[@MonsterlessonsAcademy]

Yes you are right

[@mralextacy]

wont {false && } be rendered as false in the dom?

[@MonsterlessonsAcademy]

No it won't

[@yuliasereda5671]

Oleksandr, where are you from?

[@MonsterlessonsAcademy]

Originally Ukraine, now Germany

[@yuliasereda5671]

@@MonsterlessonsAcademy прекрасно, я спочатку подумала, що ви русня, а потім зрозуміла, що ви Олександр через О)

[@lastspoil5547]

I thought junior frontend interviews only ask JavaScript, html, and css questions

[@MonsterlessonsAcademy]

No. They ask whatever they want

[@muslimm3027]

ни хрена не понял, но интересно ))

[@isaacreyes4915]

Feeling like a wasted an hour of my life. Finally got around to watching the entire thing and everything just seems to know basic React knowledge. Stuff anyone would know if they have used React before...

[@MonsterlessonsAcademy]

It's a first section of the whole course. Obviously first questions are going from the beginning.

[@DutchmanRadio]

First thing is first, React is not a framework. 3:02 wait what???

[@MonsterlessonsAcademy]

Yes yes, but we constantly compare it with Angular and Vue.

[@DutchmanRadio]

@@MonsterlessonsAcademy it was a fantastic video, I just wanted to be pedantic lol.

[@MorpHeer]

These seem a bit easy and basic, I don't think you will be able to dominate your next interview with just these.

[@MonsterlessonsAcademy]

I have students who passed interviews after talking my full course and learning all aspects from it. So I would say it is enough for most cases.