React Interview Questions and Answers - Dominate Your Next Interview

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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[kydesigns]

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

[MrPankoPanko]

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

[SamipShresthajava]

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

[Localhost]

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

[MUGGER_NUGGETS]

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

[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.

[damianodamian]

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..."

[xVantwoutMaarten]

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

[codingispower]

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

[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...

[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?

[adinamarasanu]

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

[matrixhasyou]

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

[mralextacy]

wont {false && <Component/>} be rendered as false in the dom?

[yuliasereda]

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

[lastspoil]

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

[isaacreyes]

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...

[DutchmanRadio]

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

[MorpHeer]

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