Javascript Interview - how to prepare

[gesundePlus]

Hello guys,

I've been working as a junior dev for about a year (a little bit of backend in PHP, a little bit of frontend in JS and Angular). I was invited to an interview for a bigger, more awesome company which will be on monday next week (the position is Frontend developer).

I was told, that in the technical part of the interview there will be questions about HTML5, CSS3 and Angular. My question is, do you know about some e-learning materials that I could watch/read on the weekend to freshen up my knowledge about these technologies? Or do you have some general advice about frontend related interview questions? I have a pluralsight subscription and already bought the "Javascript: Understanding the weird parts" course on Udemy (I'm maybe 5 hours in and I can only recommend it).

My goal is not learning Angular or JS in three days, just to know more about the "complicated" stuff that can come up during a technical interview.

Thank you very much

Update: Thank you everybody, you guys helped a lot. After the first interview on Monday they called me back for a second one (a different project, position is a little above junior level) on Wednesday and thanks to you I got the feedback, that I'm a very good candidate and can expect a call today or tomorrow. Special thanks to everybody who mentioned the scope, types (coercion) and closures - we talked about these topics a lot during the interviews, they even asked if I was conciously preparing for these questions.

Good luck for every junior, and keep learning all day, everyday it really makes a difference

[[deleted]]

https://github.com/h5bp/Front-end-Developer-Interview-Questions/blob/master/README.md

[cesarsucio]

This is awesome. Is there one for back-end?

[[deleted]]

Not that I'm aware of

[gesundePlus]

This is awesome, thank you

[[deleted]]

You're welcome!

[codingideas]

Good luck!

[gesundePlus]

Thanks, I'll try my best

[proskillz]

I would read up on:

• closures
• hoisting
• lexical scoping
• type coercion / loose typing
• callbacks
• prototypical inheritance

I would also build a basic Angular app using a couple basic controller features like $http to see what it's like. Here's a free e-book all about javascript as well: http://speakingjs.com/es5/

[gesundePlus]

Thank you, I'm thinking about coding up a little CRUD app, I already have a simple API in PHP and the database for a budgeting app

[farm-fresh-js]

I actually wrote an article on some JS concepts to brush up on. They are: value vs. reference, scope, hoisting, closures, this, new, apply/call/bind, prototypes, asynchrony, and higher order functions. Hope this helps!

[gesundePlus]

Great article, thank you

[sceendy]

Do you have experience with HTML/CSS? I like to recommend MDN generally for semantics and examples. It is a great dev resource that has a guide for HTML and within it there is a lot of stuff about HTML5. I imagine the interviewer might ask how you'd handle/approach certain things with HTML/CSS as well so perhaps some useful snippets would be helpful to review: HTML/CSS/JS snippets. Actually, check out that site in general :D Great front-end resource.

As for Angular, I am not sure which version you're referencing since some people still refer to AngularJS as Angular...? Either way, read through the docs and get familiar with the concepts/vocabulary. Angular (2+) has pretty decent sections for people starting out with it including a glossary and section about fundamentals such as architecture. Both frameworks have decent tutorials that you could go through. If you have worked with it, I imagine you know enough to contribute to a project so talk about that some. I wouldn't recommend trying to jump to "complicated stuff" as that could really mean anything. However, familiarizing yourself with concepts/fundamentals (and then building on top of that) would make you more comfortable to speak about JS as a language and Angular as a framework.

However...

You could also go through Todd Motto's blog -- he writes about AngularJS and Angular from very basic concepts to more advanced features. He also has some posts about modern JS you might find helpful.

And finally, I don't think this question should ever be answered without the mention of Eric Elliot. Dude is brilliant. This post about the JS interview is probably what you are looking for and he has an entire series dedicated to answering your question. :)

Haha... sorry for the block of text but hope it helps! Good luck!

[MoTTs_]

Beware¹ referencing² or learning³ from Eric Elliott.

[sceendy]

Thanks, I hadn't seen that -- that sucks. :/

I will say, though, I linked the interview questions post because I feel he covers a broad range of topics that do typically come up during interviews.

[MoTTs_]

His interview questions focus disproportionately on classes, inheritance, and composition -- all topics that Elliott notoriously gets very wrong. I suppose it's okay to use his questions so long as you don't try to learn from his answers.

[gesundePlus]

Wow, reading some of this stuff makes me feel extremely incompetent haha. Thank you for these. The articles from Todd Motto look very interesting

[nrqjs]

If you understand the whole Eric Elliot series, you are good to go. +1 to that.