React.JS Mock Interview | Interview Questions for Senior React.JS Developers

The third episode of the Turing Mock Interview series takes a look at what a technical interview on React.JS looks like. Watch the video to see what questions get asked the most in a React.JS interview, learn about the concepts you must brush up before the D-day, and what you can do to prepare better for your next React.JS interview.

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Turing connects exceptionally talented software developers to remote engineering jobs at Silicon Valley and US-based companies. 200+ companies, including those backed by Google Ventures, Andreessen Horowitz, Founders Fund, Kleiner Perkins, and Bloomberg, have successfully hired Turing developers.

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The company was founded in 2018 and is headquartered in Palo Alto, California.

[forbiddensouls]

A simple yet crucial tip: Please include subtitles in case the audio is not clear. Not doing so compromises the quality of the content.

[LuisRojasSalazarCR]

One clarification before I forget, Angular doesn't use Virtual Dom. Angular is a declarative framework that works with change detection feature. On the other hand, both React and Vue use Virtual Dom as their rendering mechanism. Great video, btw!

[prateekjain]

at 5:00, why would it depend on a project to use Class based or Functional Components? Class based is obsolete now. Many of the packages and methods are depreciated and rest will be scraped off soon. If you have to start a new project today, it's a straightforward choice to go with Functional components.

[umaradamujere]

I just realized that am a senior react developer

[mishkat]

Loved the way Jose talked. Friendly and encouraging.

[sohaibrumi]

really liked how Jose is friendly and encouraging and how Rakib answers every question in details and is honest with his answers.

[licokr]

I'm preparing for interviews as a junior frontend engineer now. The video helped a lot. Thank you so much for the reality mock interview video 👍

[sibananda]

00:03 Rakib has 8 years of experience and switched to JavaScript based technologies recently
02:41 Front end built exclusively with React
05:01 Using class components for more control and mixing and matching with functional components
07:18 React.JS abstracts Dom Manipulations for Performance Optimization
09:36 Discussion on frameworks using virtual DOM and state updates in React.js
12:01 Redux for state management in React applications
14:44 React.js supports unidirectional data flow and component testing.
17:02 Experience with deploying applications and containerization
19:17 Best practices include modularizing React and using a linter.
21:24 Code splitting in React applications improves performance and scalability.
23:30 Tips for finding React JS positions
25:36 Encouraging viewer engagement and feedback

[geniusmunene]

I love that I can follow the conversation and understand the terms thrown around by the tech lead and the software engineer, It implies I have made notable progress on my software engineering career, motivation as I am still on the road(roadmap). I wish the young me, the one who had the audacity to dream this big, could see me NOW.

[LearnByDoing]

In my experience, class component life cycle methods have many gotchas and working with hooks, extracting the behaviour in custom hooks felt way more intuitive. Worked on a complex webrtc based chat app that used class components and it was hell.

[gmd]

Wow interviewer is so nice. It is like a big brother discussing about something.

[zakk]

Interview Questions

Interviewer: Jose
Interviewed: Rakib

1:28 - about yourself, your expertise (prog. language and framworks)
4:04 - In your understanding, explain the difference between work with React Class Component (old version) and React functional components With direct Hooks, and which one would you choose for a new project

[abhijiths]

It was a really good interview experience. the questions were very clear and application level. Appreciate that. Expecting more videos.

[thakurakash]

I couldn't understand the difference stated between usage of class vs functional. All the things can be done with functional hooks these days, except maybe error boundary where you still have to rely on class components. State management if you know properly works best with hooks, especially with the advent of community contributing more towards this these days.
I myself used to hate it when I had to remember all those lifecycle events, when to use which. With hooks, it's pretty intuitive and straightforward IMO

[uajoku]

Thanks Jose and Rakib. I am thoroughly encouraged to engage in Turing Interview.

[swastikjainsj]

2 months over I am learning JS React JS it is vvv good 💜

[AlvesCleiton]

Great interview! It's my dream work for a forein company. Thanks for this!

[mohammedabraruddin]

Awesome interview gives really helpful to prepare for applying in turing

[kushalsheth]

new question for me are:
1) how you test reactjs application?
2) react linter
3) code splitting in react app

[anatolydyatlov]

Huh, I thought questions for a senior dev would be much more advanced. That brings comfort.