React Interview Questions 2020 (7 More Questions)
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- เผยแพร่เมื่อ 9 มิ.ย. 2020
- In this video I break down 7 react interview questions I would ask candidates now in 2020 to see if they have the react chops! Some of the questions include, useEffect, higher order components, render props and more.
React Interview Questions Part 1: • React Interview Questi...
React memo vs useMemo vs useCallback: • REACT MEMO vs USECALLB...
If you would like to schedule a mock interview with me, you can email me at
codingwithchaim@gmail.com for price and details.
Follow me on Twitter: / codingwithchaim
Subscribe to the channel: th-cam.com/users/codingwithc...
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link: paypal.me/codingwithchaim - วิทยาศาสตร์และเทคโนโลยี
00:34 - High Order Components
03:33 - Render Prop
06:28 - What Are Hooks
11:07 - UseEffect
15:11 - memo
17:33 - useCallback
20:36 - useMemo
You are all welcome. 🤘🏼😉
Lmao damn I just told him 5 seconds ago adding time stamps would be amazing. Thank you
I have an interview in 39 mins and after practicing and studying, listening to you explain everything so concisely really solidifies everything in my mind and gives me confidence. Thanks Chaim!
How was it?
How did the interview go?
most likely didnt get the job :/
You'll get it :) keep going ! never give up
@@tkimdev thanks! That interview was actually a practice interview with skillshare 😂 but it prepared me for my real interviews and I work at a start up now ☺️
The music is a little bit too loud . I liked the setup from the last video more. Great content!
That useEffect explanation was the best I've seen so far. +1 Subscriber
Really informative. The examples are making the whole thing come together so beautifully.
This was good. Liked they way you showed that hover implementation using 3 different patterns, HOC, render props & custom hooks. Thanks man
Following along to these series very closely. Appreciate the content
Thank You chaim ! This is really an advance level of understanding of React.
Great and very informative. I learned a lot regarding the fundamentals behind the things we do everyday in react. Just having trouble keeping up with how quick your pacing in discussion is when I'm trying to process what you just said and then going back to where you are to try and catch up. Rewinding solves that, though. No biggie. Thank you, kind sir!
Your explanations are just wonderful. Pleaseeee create more videos on React interview questions.
I have seen both your 2020 interview questions and they are brilliant !! thank you
sosososo good
I took 6 courses.. have been studying react since january... none of the teachers were this clear. THANKS BRO
Thanks for the content. I missed questions about Virtual DOM, and Reconciliation, data fetching patterns, and testing react apps.
Your explanations are concise and on point! Incredible teaching skills that you have! Thank you for the content, keep it up!
Thank you! I appreciate it and am glad you enjoyed the content!
Excellent content, and you explain it so clear. Great video!
These videos have been great for some refreshers for a React interview. Music during the speaking parts got distracting, but I was still able to follow along. Would recommend not having background music during lessons / speaking parts requiring more concentration imo. Thanks again for the great videos!
Great content Chaim, and keep up the good work.
Amazing content on both of the videos. Thank you!
awesome explanation with code . please make more interview video if possible
0:30 What is a HOC?
3:30 What is a render prop and why is it good for?
6:30 What are hooks and what’s the problem they solve?
11:05 What is useEffect and how does it work?
15:10 What is React.memo?
17:47 What is React.useCallback?
20:35 What is useMemo ?
Excellent video, thanks for sharing :) and of course, wish us all to succeed in our interviews 😉
the one of the best teachers ever
Amazing video, really well explained!
Great content boss man! Keep it coming!
wow damn you explained the topics really well, god bless you!
Excellent video. Adding time stamps to these videos would be amazing
Amazing and helpful content! Very articulate and concise also. But I agree that the music (the hihat specifically) is a little bit too loud, especially if you listen with headphones. Liked and subscribed
Excellent and simple explanation, the best I had ever seen! How about Redux? Can you create similar Interview Questions about Redux and Thunk libraries?
I in fact like this video and it pretty much covers all the right questions and I’m grateful for your work! So just in case you welcome some feedback, I’d suggest in the nicest way possible that you maybe decrease the usage of ‘in fact’ and ‘pretty much’ because when I started noticing it, I got distracted from the content for a while. Again, great job overall, please, don’t be offended by my comment, I only wanted your content to be even better.
Hey Chiam, just gonna let you know your react videos were incredibly insightful and are a gold mine of knowledge. I used your resources while studying for my interviews and landed a new position recently thanks to you. Cheers for the new years !
thats amazing! Thank you so much for letting me know
@@CodingWithChaim your way of teaching is so good.. you should do more similar videos
This is gold! Thanks for the video. It would be nice to see good practice of API calls and storing data in context. I usually do optimistic render but i have no idea if im doing it right
Glad you enjoyed the video! I will be doing a react tutorial in the nearish future which may help with any confusion you might have
Great pace, great content!
Thank you!
Please make more of these videos they have been super helpful
Ok thank you for the suggestion I will try to include more videos on this for the future
Loved it!!
Getting an interview in less than an hour...thanks for these videos
Best of luck! Would love to know how it went!
lol me too
I was rejected on that interview, but after applying for more jobs, I finally had two job offers to Choose from a few weeks ago and could finally land a job. Thanks again
I got the position today. It’s an unpaid trainer internship but at an amazing company. While he didn’t ask me a lot of technical stuff (so lucky) I can say these two react videos and the usememo, usecallback, etc videos helped me more than so many other react videos with my soft skills and confidence. You the man, chaim
Congrats on the internship! Best way to learn is by doing! Best of luck
Great content and thank you very much. One suggestion, can reduce the pace little bit and the music is kind of distraction without the music it was easy to focus and digest the information. Thanks Chaim!!
Thank you for these React Interview videos. I feel like im learning a lot. I love using React and I enjoy how powerful it can be.
I am really glad you enjoyed this video. React is indeed very powerful and fun to work with
Heyyy Denzell, I recognize you from Twitter lol what's up man
@@gabriel_export Haha Hey! I was happy to see an email for this notification. Happy learning, this video is super healthful. I think I watched it at least 6x now. Self Promo: Follow me at twitter.com/denzcodergrant
Excellent Explanation :)
last 4 minutes were def tough for me.... dont know much about useMemo and memoized stuff. liked that you went over legacy code too. def don't know too much about higher order functions or render props but your brief overview helped a bunch!
This video will help you with useMemo and the like. th-cam.com/video/uojLJFt9SzY/w-d-xo.html
awesome, great content
I wish I saw this video a year ago. It would have saved me from guessing and headache.
I thought these series were quite good. Most of the questions are cliche, but so are interviews! So worth while for the care with the examples and exaplanations.
I have rather a suggestion of effect, should you continue with this series, I think the most important bit is the "bit-sized" projects where you assess the candidate ability to change, and fix code. If you could think of cool situations and applications of core features in such situation from a examine perspective, it would be certainly awesome.
Great job.
Thanks!! I really appreciate the feedback and suggestions. I actually do have at least one react code example where the code is broken and I would have candidates fix that. I suppose if I can come up with a few more, that would make for a solid video!
this is not quite related to interviews, but I had this remark on 10:16, I think in the case of event handlers of DOM elements that are attached only on mount (empty effect deps [] ), it is useless to use a clean up function in the useEffect hook only to remove the handlers, since they will only be attached once
Amazing content Chaim. Would be super useful if you could put a github link for the code.
Great teaching! Thanks a lot!
Great videos. First one without music was easier to follow than this. Nevertheless, great content. Thank you Chaim!
Please upload react videos more..your content is awesome and to the point
i have my first react interview tomorrow, thanks for the help) subscribed
Wishing best of luck! Let us know how it went
Fantastic content
Any new React videos coming out soon? I'm just now digging through your library - you get in depth very well and I love it!
yes new video dropping this week
Tomorrow I'll have a very important interview, for a life-changing job. This video helps me a LOT! Thank you very much!
How did it go?
@@CodingWithChaim Thanks to your video, I kinda nailed the React questions! But unfortunatly I was not as good in the NodeJS and JavaScript questions. I dindn't get this job, but they liked me and want to assign me to other position, more frontend align!
Thanks for such a useful video
Thank you Chaim
Good content. It would be great if you could explain when to use HOC and render props in the hooks era.
Interesting, I honestly don't know if I can even think of a use case where I would opt for an HOC or render prop instead of a hook. Gonna have to give that some thought
Very cool content!
Great explanations!
Thanks!
Very informative
Chaim, thank you so much for this video series! I am currently interviewing for React developer positions and your definitions and reasons for how and why to these questions are gold! Seriously, I am going to owe you big time when I get hired!
I sure hope these videos actually help you get hired! That would make my week!
@@CodingWithChaim I write study guides to quiz myself on these interview quiz like questions for all the technologies I would use on the job. This was honestly one of the best resources I have found for clear concise explanations to so many fundamental concepts in React. My next big interview is tomorrow! I will come back and update you with the results, fingers crossed!
Ok awesome! Best luck and you better let us know 😉
@@CodingWithChaim I GOT THE OFFER!!!!!!!! THIS IS THE BEST DAY OF MY LIFE! It has been an hour now and I'm still trying to accept reality. I am self taught, and started back in March learning from Udemy courses. I learned Javascript, html, css, scss, node.js, express, Mongodb, and of course the beloved React! Today, November 24, all my hard work has paid off. I can't thank you enough for providing wonderful videos that contributed to my growth as a developer in a meaningful way! I can't believe I'm officially a Front end engineer!
Congratulations!! Please send me an email. Would love to connect
Bro, ty for your work.I would love to see some "React Best practices" from you and what are the most mistakes young devs make working with React. Help us get that dream job =]
You are very welcome! Good suggestion I might just do that for a video
Thanks for great video. it would be nice if u provided the git link
This guy is a beast
Thank you for video it is really good. But question: largestNumber() and someFunc () both are functions I didnt understand what is a difference useMemo and useCallback
Thank you!!
nice video. Keep going!
excelent video
i watched both react interview questions videos...both are good...subscribed..clicked the bell icon..:as sequence video you can make
1). Redux vs Context
2). useContext With useReducer
3). Error Boundary
4). Which React Form is good ...Normal form with usestate..or.redux-form..or..react-formik...?
5). Which UI libraries is good..Semantic UI (its pretty good i have used) or Material UI..Prime ..?
There many i will be adding questions...as i am looking for job in further..But You doing well..;-)
: -)
Fantastic suggestions! Thank you
Nice content, thanks for uploading. Had no idea about memo, useMemo or useCallback. Are these the kind of questions to expect on a junior position interview?
Personally I would not dock points of a jr for not knowing these concepts because they relate to performance tuning which jr devs usually are not tasked with dealing with that.
Chaim you are great! i bet you can teach the talmud in such a perfect way as well ! (:
I love your videos and study material but 1 request keep slow down your speed , hard to catch you at some points.
Great Content... bad music.... great job!
Great!!
Thank you! :D
Why was the array of numbers (i.e. const array = [1,2,3,4,5,6,7,8,9]) not used as a dependency in the useMemo hook? The code still seemed to work obviously but logically I would think you would add that as a dependency.
could you consider passing a component as a child to another component a higher order component?
I like your videos Chaim. Just a suggestion - please don't use music in the background as it distracts from actually focusing on the content of the video.
Thank you 😊🙏
Nice video. thanks. please don't add the background music, it's kind of distracting.
what is architect of React js ?
Part 3 ?.
Its fully worthy and knowledgeable
But one critique:
The speaking tempo is so fast and would be so more understandable if u speak abit slower
U are using old syntac react upgrade
Thank you for these wonderful videos - is there any chance I can request you to speak a little slower? Non-native English speakers has to rewind multiple times and re listen. Brain processing capabilities.. Thank You again for all the help
Do you have these code samples available?
Yes I do! I will put them up on GitHub when I get a chance. I’ll comment a link once it’s done
pretty much
Is it just me or the video goes black on useEffect hook...
not me
Very informative, thank you for all your videos, you do great job . just Could you please speak more slowly ?
reaching the end of the video its gets very distracting to have the music in the background trying to listen to you
Noted! Newer videos do not have music
Helpful video but fix your sound because sometimes it's hard to understand. If you can't, at least remove the music. It would be cool to see some js, node.js and data structures interview questions. Thanks.
music is too loud, can't focus
great content, the music too repetitive
Got interviewed and I think the interviewer used some of this questions
that is actually really funny, tho it can be a coincidence since these are pretty standard for react.
Excellent content but the music is really loud and annoying.
the volume of voice is low
Nice Shirt :)
I would appreciate if you can speak a littler slowly ,as most of the times as a listener I am not able to think and understand the concept,thanks for the great content
You can change the video speed in the video settings to make it slower.
Btw pretty fast Speak. bit slower can make it more understandable for non-native listners
Call me old school but the loud music is distracting. It's taking away from great content.
Dude besides you're talking to fast and your voice is low even with headphones turned on max, you add that song on background... bad idea
This is so hard to understand. Your video made me lose all hope on ever doing well at a react interview
I’m sorry to hear that! Don’t give up. Ask questions on what’s not clear
annoying background music