Google Frontend Interview With A Frontend Expert

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In this video, I conduct a mock Google frontend interview with a frontend expert, Conner Ardman, who's also the FrontendExpert course creator and an ex-Facebook software engineer. As a Google Software Engineer, I interviewed dozens of candidates. This is exactly the type of frontend coding interview that you would get at Google or any other big tech company.
Check out the Google Frontend CSS interview that we filmed on Conner's channel: • Frontend CSS Coding In...
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My LinkedIn: / clementmihailescu
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Prepping for coding interviews or systems design interviews? Practice with hundreds of video explanations of popular interview questions and a full-fledged coding workspace on AlgoExpert - www.algoexpert.io - and use the promo code "clem" for a discount on the platform!

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12 апр 2022

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Комментарии : 429

@clem 2 года назад

Wanna build the next FrontendExpert? We're hiring course creators to build out new products on AlgoExpert! Learn more and apply here: www.algoexpert.io/jobs

@somerandomchannel382 2 года назад

young people trying to sound expert by using Promise all and some very basic JS code examples with document.createElement and append? This isn't even pair with a shorter Frontend Course in 3 weeks. Heaven almighty.

@caolijun2010 Год назад

@@somerandomchannel382 u should tell young man how to pick up javascript and what is source code of "doucment.createElement" in c or c++ by chrome or safari

@ibrokhimjalalov2685 Год назад

Why not event deligation.

@shadestorm3995 2 года назад

I guess this is what the difference is between an experienced developer and someone like me... I would have run my code 10 times before writing another function... my man is writing logics with such confidence...

@biggestthreattoyourexistence 2 года назад

It's not a real interview Conner is a genius.

@mr.mystiks9968 2 года назад

@@biggestthreattoyourexistence it’s pretty realistic for candidates that know how to interview well. doesn’t take a “genius” to do this.

@vulcanvulcan2963 2 года назад

My manager will write hundreds of lines of code before testing anything and he gets it 99% correct every time. He’s been doing it for around 8 years and the biggest difference between someone like him and a beginner is that they have a very strong understanding of how they are going to solve the entire problem from the beginning, even complex problems. Lots of beginners try to come up with the steps to a solution as they develop and will get confused because they don’t have a clear understanding of what their final solution should be.

@mileicampeonmundial 2 года назад

to be fair it was too basic

@shinchannohara9511 2 года назад

@@vulcanvulcan2963 thanks for the comment❤😃

@ConnerArdman 2 года назад

Thanks for having me on, it was a lot of fun! 😀

@arnasjuskevicius4193 2 года назад

Conner, you are a beast! Great interview example, was super clear! I can learn to communicate ideas loudly from you! I would console.log at the end of every step to check if data is what I expect, even I know that code should work haha. :D

@universecode1101 2 года назад

Great ✌🏻

@brockharris8169 2 года назад

This is very cool. Great video Conner.

@ConnerArdman 2 года назад

@@brockharris8169 Thanks! Hope you're doing well, it's been a minute 😅

@ConnerArdman 2 года назад

@@arnasjuskevicius4193 Thanks, communicating ideas is definitely something I try to focus on a lot in interviews. And nothing wrong with adding console.log statements in every step. In hindsight, I probably should have logged out the result of each of the transformation functions after writing them. It can be a good sanity check, and it helps make sure you don't lose the interviewer along the way.

@Skalexsong 2 года назад

This is such a great example of a very confident interview, gotta learn a lot to be more like that.

@eliotlnguyen7329 2 года назад

Because of your youtube interview content, I've bought your algo expert course for a full year. The marketing worked.

@hemantprasad1018 2 года назад

Thank you Clement 💓💓💓. Was waiting for it for so long....

@yafetbefkadu8508 2 года назад

Idk why I feel like watching these just teaches me more things Iv never seen or tried before you can always learn from others and try it yourself

@DriveandThrive Год назад

The speed in which he did this in is quite impressive. Makes me realize how far I have to go!

@leeboyin945 2 года назад

Great demonstration! As both interviewer and interviewee, I learned a lot from this video, thanks.

@osborndelangel5994 Год назад

Yo Clem, I just want to say you and Conner are great teachers. You guys have explained concepts that were “scary” and now they’re not.

@loristnorton3723 3 месяца назад

Thinking about the solutions is one thing. But properly articulating it with a coherent accuracy is without a doubt a mark of someone with confidence and experience.

@user-tw7ox8dd2b 2 года назад

That's just very cool, a few times ago I couldn't explain how works with the DOM. It's just really simple and very useful.

@farazcsk 2 года назад

Also, the courses are very very good, thanks for creating them. Looking forward to “Mobile expert”!

@hamidubawe4496 2 года назад

Me too

@RockstahRolln 2 года назад

Thank you for this Terrific video! I needed exactly this to practice my interview questions! Great job to you both!

@RockstahRolln 2 года назад

@Nikola B. Ethics and problem-solving are two different things, perhaps you should learn the difference first. On my own, I am learning how to solve problems. In fact, I have been doing so at the different companies I have worked for several years. I would like to have a fighting chance by learning how to pass certain interview questions and this right here demonstrates that. If you find this unethical, then you should'nt be here. Have a Blessed day!

@RockstahRolln 2 года назад

@Nikola B. Oufff This right here, what you have said "Can you at least treat me as a fellow human being and spit to my face without pretending you're kind?" why would I spit on your face when you were the one to come at me about ethics? I did not ask for cheat codes, so please do NOT imply that or, simply assume so. I am merely learning here as do everyone else who has positively commented on here. So yes, thank you, I will feed the right wolf that I choose. If you choose what I have said to be poison, then so be it. Your choice.

@khaledbenzid5365 2 года назад

Bro can center a div

@havefun5519 2 года назад

Really cool, detailed explanation and good enough speed.

@030426101993 Год назад

Thank you for making this video. This is just awesome and super helpful for my upcoming interview.

@CoderGrammer Год назад

As a primarily back end dev, this was eye opening! Thanks buddy

@MatejDrbohlav01 Год назад

Exactly what I thought, I 100% agree, it is just beautiful and fulfills the picture.

@dongwong297 Год назад

Loved this video! I am new to coding and have never seen frontend, so this is was real fun :)

@DebashishGhoshOfficial 2 года назад

This shows how important it is to choose a proper data structure for the problem. Otherwise it would be difficult to navigate the code and understand what is being done.

@nnlniclb 2 года назад

I have been learning to code for the last month or so but I still don't understand what you mean by a proper data structure for the problem. Can you please explain like I'm 5?

@joni062443 4 месяца назад

Very true. Fundamentals is always key, frontend or backend. DSA is king. Lots of practice and build lots of things.

@qweqwe_Flinstone Год назад

wow i learned so much after almost one hour video :O I hope theres more like this videos on your channel D:

@luketutber9326 2 года назад

Once again, a very good video by Clement.

@MatejDrbohlav01 Год назад

hey! I am a junior java developer now fo several month and have 1 year BootCamp behind as well (backend java) - I think I now understand what "front-end" development means! And it is beautiful! It fulfills the picture, it is just soooo good :) gl with everything :))

@ATIWatchReviews 2 года назад

This is fantastic, thank you both

@aman.social2100 2 года назад

That was really smooth. STRONG HIRE!! Agree 💯%

@AndresLobaton 2 года назад

Awsome, I liked a lot this interview. I hope in a couple of years try to apply to one of this roles. Thank you so much

@explore-learn-share6937 2 года назад

This is outstanding. Using plain html, css and javascript for wonderful page rendering

@aurelianspodarec2629 2 года назад

Pretty basics. Would be better off using factories instead and create functions for the API calls, make it abstract etc... Nothing special.

@mrchedda Год назад

Not the React way unfortunately. 12:30

@hoangphan5224 2 года назад

That's the best FE interview format!

@pratikkumar939 2 года назад

Was Waiting for this

@ardhiyanah5544 Год назад

Some i learned from this video is promise all and replace function, thank you so much for new insight, oh and you miss the progress bar, it was mentioned in the early interview but yeah the code still amazing to me

@clashwithmoi8926 2 месяца назад

you can call prototype functions either way. both will work. that's the beauty of it

@Alex-xo1nt Год назад

I learned a lot from this. Thank you!

@sanjeev3799 2 года назад

Very nice, helpful and motivating. Thank you!

@Booyamakashi Год назад

Interesting approach with building the DOM using DOM. My first intuition was to create a template literal and just call functions inside of it. Kind of like templating language.

@tuxsbro Год назад

Then you have to worry about XSS

@johnames6430 Год назад

@@bleulejour forget all that and use Svelte?

@FeFeronkaMetallica 2 месяца назад

This

@abhaytiwari6411 2 года назад

Please bring more video like this one.

@jialx 2 года назад

These interviews are super realistic of what its like to be a FE dev.. I always code using a web based IDE, implement features with another dev looking over my shoulder, and explain every decision I make as I make them out loud.

@NathanHedglin 2 года назад

😂 right? Interviewing is a completely different skillset. Imagine hiring a chef solely based on his ability to sharpen knives.

@jakubnowak7091 Год назад

presenting your skills is a part of this job, unless you want to be a underpaid specialist

@aufkeinsten7883 Год назад

@@jakubnowak7091 Presenting your solution is only a part of interviewing though, the more problematic part is performing your job while having someone look over your shoulder, that someone being the deciding factor in whether you get the job you want. Without trying to add to stereotypes, I do also think it's fair to say that this is especially bad for people who - on average - tend to be more shy and less skilled in social situations.

@johnames6430 Год назад

@@aufkeinsten7883 many great people have been denied jobs because they are shy when they might have been really good for it, that's just part of the discrimination that goes on in hiring and if we are going to correct for discrimination based on race and gender we must also correct for discrimination based on shyness, disability, and many other things.

@soultune908 7 месяцев назад

@@johnames6430 exactly. I'm little shy and it kinda sucks when communication is given more importance then coding skills. I do communicate when necessary but I won't involve in chitchat.

@licokr 2 года назад

It's an interesting interview :) So amazing, I hope that here I live frontend engineer interviews would be going like you guys do here. Thank you for the great video!

@johnames6430 Год назад

I've heard some stories where a company had the candidates build things with pasta for the tech interview in a small groups, there are many insane things when hiring in tech

@Gringo0517 2 года назад

Thanks Connor! Great interview

@VishakhasEngineeredPlans 2 года назад

This was so so cool and helpful! There are not many frontend interview prep videos, and this is just what I was looking for! Is it okay if I recreate/use the api endpoints to practice this same problem?

@clem 2 года назад

Sure. Alternatively, buy FrontendExpert and get access to way more problems! 💪 frontendexpert.io

@VishakhasEngineeredPlans 2 года назад

@@clem Looking into it right now :) Did have a question, does it provide the env like you've shown in the video? I mean will I be able to run and test my code for promises and array problems etc.?

@joelvarghese3370 2 года назад

@@andreigugeanu Yes, this happens when you call an API from another domain. I don't think there's anything you can do from the front end to solve it. I'm not sure though and maybe others could add to it.

@adsarasin 2 года назад

@@VishakhasEngineeredPlans yup! You are seeing them use the platform in the video. It would be the same.

@MikeBertelsenDK 2 года назад

The interviewer is really intense.. Kinda stresses me out.. But it was very interesting to watch, great content, challenges and I learned something new so that's always worth celebrating!

@AbmAsadullah Год назад

Many many thanks, Really helpful for me!!

@TheBarthinator Год назад

after 4 years working in the industry i fully understood everything and would have probably coded it the same way, however, my man is very bold not testing functions throughout i would have tested each one checking the data with not as much confidence as him!

@ericwango Год назад

I completely understand the logic and it doesn't seem too hard, but it would take me half a day to actually get the right logic and code it up like he did hahahah

@abhinavghosh725 2 года назад

The Google Backend interview is going to be interesting !!!!

@alexe3332 2 года назад

41 min. If you want to order the categories, you have to assign each category as a key then when finished, iterate through the keys and sort them in an array then every time you select, select from the array and use the value to point to the key in the object. Once you get that, you just iterate through that set within the category. I just had to do this myself.

@lukasmajerik6439 Год назад

Cool demonstration. Thx!

@clem 2 года назад

I present to you Conner, also known as FrontendChad. 💪😎 Check out the CSS interview that we did on Conner's channel! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ak4p7sdKJQw.html

@davidardo4466 2 года назад

@clemnt please answer me

@masternobody1896 2 года назад

Juat got rejected from Google xD

@masternobody1896 2 года назад

Lol

@Aliakbaresmaeiliiii 2 месяца назад

so useful man thank you so much

@izopi4a 2 года назад

a simple page with 3 functions, "fist step is to use react". way to go

@_Sizzin Год назад

That was, surprisingly for what I expected from Google interviews, a quite easy challenge. I would have done the code similarly. Though I'm not confident I would answer the "how would you clean up the code" as well as he did.

@jww0007 Год назад

if it was harder how would you complete it in 45m. interviews are about communication & problem solving, you'd be surprised how many people can't do this as calmy

@_Sizzin Год назад

@@jww0007 A harder challenge not necessarily means that it takes longer to complete. Believe me, I've had much more difficult live coding challenges from companies half as big as Google.

@theLowestPointInMyLife Год назад

No way the real interviews would have something this basic.

@catalineu77 Год назад

@@theLowestPointInMyLife NoT EvERY OnE iS As SkiLlEd LIkE YoU,ThIS Is MoCK INtErVIew So US ThE UnSkILlED PLeBs CaN LeArN ALoNG ThE Way,ok boss?

@benjaminmoseslieb9856 2 года назад

Can someone explain why he didn't use an HTML template strings and opted for creating javascript elements? I must be missing something, because that's what I would have gone for.

@MrJettann 2 года назад

instead of creating every element on the page, can we use template and fill it's fields with our info? It template tag not recommended now?

@seobookpro 2 года назад

Very interesting there is a more options to achieve tasks like this actually.

@mikeicon8488 Год назад

This was a good confirmation of my love for template literals. I'd much rather return template literals in most cases than creating elements with js methods.

@mikeicon8488 Год назад

give me return ``; over const div = document.createElement('div'); div.classList.add('category'); return div; any day

@jahangirakbar4524 Год назад

My question is: Do you have to work on designing part aswell as a front end web developer?

@17teacmrocks 2 года назад

when I interviewed for Google FE, they asked me all algo questions? I didn't do anything like this. It was like dfs, bfs, rate limiter, compose pipe, string algos, trie, tree

@Gugmi 2 года назад

Is it wrong to use question mark conditionals in this type of interview? Also I’m assuming using a library like Axios is out of the question for this type of interview?

@TheSocialDeveloper 2 года назад

This is the kind of interview I’d love to do

@bavideomaker29 Год назад

I enjoy these, great job. But, I’m old and often can’t see much of the text. Is there any way you can zoom in or use larger fonts in the future so those of us who started coding on Apple II’s can read?

@makkie8593 Год назад

I use youtube in browser so i can zoom in

@siposrr Год назад

In quality 360p or 480p you cannot read the texts properly, even on a monitor. You should try it with min. 720p.

@omrtheater7244 Год назад

Why do we need to await inside the fetchAndAppendQuestions function? Isn't it enough we used await once during fetch?

@ahmedamerica 7 месяцев назад

Thanks for this 👍💪

@neeeeeck9005 2 года назад

Do Front-end devs at google get specific type of algorithm questions? Or are those universal, same as for software engineers?

@Krilllind 2 года назад

What I was lacking from this interview was usage of even more modern API:s like Map over usage of just an object and classes to structure code a bit more. But I guess first question should be, what browsers am I targeting, from there you can evaluate what API:s to use😊

@diegoalvarez437 2 года назад

Modern frameworks has tools like Babel when building your app, so you don't really need to worry about modern syntax.

@Krilllind 2 года назад

@@diegoalvarez437 Uhm... Not correct, babel can transform your code to an earlier version of ES if needed, but it won't convert things like an object into a Map. Those operate differently.

@diegoalvarez437 2 года назад

@@Krilllind you're right I misunderstood your text.

@bigbob2364 Год назад

dam dude u pro or something?

@Krilllind Год назад

@@bigbob2364 Worked with tech for over six years as fullstack developer, focusing on web frontends and dotnet backend. So not a pro yet, but on my way☕

@9990490677 Год назад

Apart from the API building round, my Front End interview for Google did not have any FE specific round.

@mitarskoro1087 Год назад

I do wish more companies did these kinds of interviews because it does test what is actually the part of the job of a FE dev.... unlike more algorithmic heavy interviews companies do.... That said, I highly doubt these big companies ask for such simple tests... This was pretty basic

@sundushussain4952 Год назад

was this really simple?What questions are asked in general?

@theLowestPointInMyLife Год назад

Exactly, it's a much better way of seeing the sort of code someone writes day to day, rather than some hyper optimized solution to a hypothetical problem that they'll never have to deal with in the real world. Obviously if you hiring for a systems position then this basic front end manipulation won't cut it.

@aleksandrzhilkin4800 Год назад

who uses native DOM instead of React/Angular/Vue? I don't realize why Google asks about DOM manipulations.

@renegade4321 Год назад

@@aleksandrzhilkin4800 I think it can show what is the level of your expertise and what is happening inside all Frameworks rendering DOM

@karis7539 8 месяцев назад

@@aleksandrzhilkin4800it's because they don't use frameworks for best performance. even worse they are using web assembly and canvas rendering

@trblmkr5139 Год назад

oh this is gonna be GOOD, just started watching lol

@danielcooke3243 Год назад

hasOwnProperty checks the entire prototype chain so its not recommended to use it over plain object indexing. So already a mark down for that

@solaaar3 8 месяцев назад

you can see why libraries like React/Vue are making life much easier and organized.

@CertificationTerminal 9 месяцев назад

Impressive!

@Sindoku Год назад

I definitely feel I could pass this portion of the interview at Google.

@BukhariTechnologies Год назад

Please bring an iOS Software Engineer mock interview.

@takundanashechidamba946 5 месяцев назад

thank you 🤝

@azzhraanee201128 2 года назад

better coding strategies, for example: - the status class should be defined in a different function, so that when there is a change in the CSS or additional status, it's easier to update.

@iam_a_sad_khan 2 года назад

he made it look so easy.

@SMURFPICTURES Год назад

is it really good design to make everything a const? especially when creating an empty object knowing its gonna be populated later?

@kokisaito4865 7 месяцев назад

In fact, learning the font-end also requires learning the back-end

@johnconnor9787 Год назад

You are doing a super great job. It was very interesting and informative

@levin1160 2 года назад

Nice function building and logics, could use this to improve mine ^^. How many years of exp did he have?

@BinaryAdventure 2 года назад

Clement are you still rocking the ultra-minimalist apartment? I see a big monitor back there... I'm getting worried 😅

@Zackmahas 2 года назад

Inaspire to be just as good as this man

@antona3050 2 года назад

Absolute machine

@prosperadebayo7589 8 месяцев назад

wow just speechless

@TranSy-sz2ps 3 месяца назад

It was a ton of fun :D.

@frozen_tortus Месяц назад

Yeah, fetch it like network is reliable! YOLO, no errors, no throws.

@deathbombs Год назад

13:05 what Fragments would help prevent repainting if category divi was added?

@rebelshadowrm 2 года назад

What is the advantage of creating elements vs cloning a template? when creating those question items.

@dilpreetluthra5401 2 года назад

Great!!

@Kim-by5uy 2 года назад

Great solution. I would have solved by looping through all the questions and grouping them by categories before mapping them to html

@alexielknight 2 года назад

Thats what he did in the function getQuestionsByCategory. It returns an object with a property for each category and the value of each property is an array containing the questions of that category.

@geocine 2 года назад

If only this is the kind of frontend interviews I get, I would confidently ace it

@harsh55 2 года назад

i don't think the current trend uses this sort of interview technique, as major companies are biased towards candidates' React, Vue, or angular knowledge. I can consider this technique for interns or fresh graduates

@Aihab1 Год назад

The problem with choosing any random category and adding a question into it (for the random complexity question) is that you can't control the number of questions going into one category and as I see on the screen, if the count of random categories was 4, all the questions were almost equally divided into each of the 4 categories. Thoughts?

@laskiri1875 7 месяцев назад

randomize your array of questions first and then come the first questions.length/4 questions into the first category and so on (assuming you have 4 categories. First thing that pops into my mind atleast.

@adrieleteodoro6551 Год назад

I just started learning code, and I would like to know, is all the interviews for software developer is like this? Or there other ways of interview?

@vaggelisk9401 2 года назад

Hey Clement, great content. Was actually wondering. Do FANG interviewers impose any limitation on JS prototype methods to be used? For example i saw "forEach" and "Object.entries" was used. Is there a scenario where an interviewer will ask everything custom built on a lower level?

@user-mx1ek4sl2m 2 года назад

No.

@jarrellidk 2 года назад

Yes and no. They won’t say “don’t use this” but they WILL say “with a max time complexity of X or to keep time complexity in mind” which is basically a more vague version of telling you what not to use.

@YouTubePL666 Год назад

this is basically low level as you use built in language features. What they could state is to make something more optimal in terms of memory usage or performance or both

@mitarskoro1087 Год назад

Absolutely... its often the case that you are asked to re-implement one of these methods

@macklemo5968 2 года назад

You should try to do a format where you have subscribers attempting real coding interviews :)

@bitflippa 9 месяцев назад

@ConnerArdman you said you use a Map but instead you used a simple Object, would be nice to see how the implementation would look like using a Map. Also, using the for...of loop would be faster than the forEach loop.

@zdargahi Год назад

you are the BEST

@cocomadfans950 Год назад

Nice one!

@JacobAuthier 2 года назад

Great!

@user-uf8yn8xm7h 2 года назад

wow atlast! something I understand along the way lol

@Papriker98 2 года назад

I recently got more and more into Web Development. I'm a Junior Software Developer and have only ever worked with Desktop Apps. I recently got into Angular and I absolutely love this. One day I'll be a Frontend Dev for Google one day! 😀

@darrenjosiah9246 Год назад

High five! Found myself a fellow Angular Junior Software Developer

@Papriker98 Год назад

@@darrenjosiah9246 I will be honest... I changed paths. I became an iOS Engineer and love it! But I'm happy that you found what you love!

@darrenjosiah9246 Год назад

@@Papriker98 Nothing beats having a passionate career that you’re proud of, cheers my bro

@user-nh7vn8nx3h 8 месяцев назад

I'm a junior react devoloper and I want to ask if they will always ask us about vanilla JavaScript, even though I'm using react they will interview my js like this ?