Javascript Coding Interview Questions- You Must Know Them

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Learn this 5 Javascript coding interview questions that I heard hundred times on Javascript interviews during last 10 years. They are focus on basic javascript knowledge this is why they are being asked so often.
TIMESTAMPS
0:00 Most popular Javascript coding interview questions
0:27 Closures
2:09 Cloning objects
3:59 Count vowels inside a string
8:32 Reverse each word in a sentence
9:25 Most common string
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2 июл 2024

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Комментарии : 53

@Vivek-Nishad Год назад

Object.assign and spread operator only work it you have a flat object like {a:1, b:2} But if you have nested object like {a:1,b:2,c:{d:3}} it will copy value of a and b but reference of c,d. so, if you want to copy nested objects you can use "structuredClone(obj)" or "JSON.parse(JSON.stringify(obj))"

@MonsterlessonsAcademy Год назад

You are totally right

@vishalupadhayay6391 11 месяцев назад

JSON.parse(JSON.stringify(obj)) will not work if the object has Arrays, Functions, and Date nested within. In such a scenario, we may have to use loadash or write one custom function to handle Arrays, Functions, and Date objects.

@SuperMatsumoto23 Год назад

I am sooo grateful for this video!! I am a junior developer currently preparing for my tech interviews, and some of this stuff was difficult to understand while just reading a text explanation. Thank you for showing these examples step by step, these have helped me get a better understanding of the theory. ♥

@MonsterlessonsAcademy Год назад

Glato to hear that. For interview preparation you might be interested in my Javascript interview questions course where you learn 56 different topics which fully cover Javascript. monsterlessons-academy.com/courses/javascript-interview-questions-coding-interview/

@AndreaDragotta 9 месяцев назад

Regarding the clone example, be aware that these are shallow copies (they do not work correctly when the object contains other objects). If you need a deep copy you should use the new "structuredClone" api or the usual trick with "JSON.parse(JSON.stringify(obj))"

@MonsterlessonsAcademy 9 месяцев назад

I have a full video about shallow comparison vs deep comparison. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-re0G89DwOb8.htmlsi=snVLRIAqpU0_5OuN

@joeldaros 2 года назад

I really like your videos, you get straight to the point. Please make more videos like this one!

@MonsterlessonsAcademy 2 года назад

I have now a full course of 59 coding exercises for Javascript interview. monsterlessons-academy.com/courses/javascript-interview-questions-coding-interview

@jonathanjohnson2785 Год назад

I don't have words to fully express my gratitude. Closures, cloning are things I found hard to understand but your style of teaching made everything so simple to understand. Thank you so much and all the best❤👍👍👏

@MonsterlessonsAcademy Год назад

Wow, thank you!

@n_fan329 6 месяцев назад

for the last question..we can also do Object.entries(mapping).sort((a,b)=>a

@MonsterlessonsAcademy 6 месяцев назад

Sure there are different solutions to the same problem.

@clement2814 Год назад

Thank you, clear and concise

@MonsterlessonsAcademy Год назад

Glad it was helpful!

@yeti9537 2 года назад

This is great. Thanks!

@MonsterlessonsAcademy 2 года назад

You're welcome!

@Shivam-sl4sp 7 месяцев назад

Thank you man !!

@MonsterlessonsAcademy 7 месяцев назад

You're welcome!

@bendevweb89 Год назад

As a Junior Developer your content helps me a lot to prepare for interviews and improve my logic Thank you very much 👍

@MonsterlessonsAcademy Год назад

Happy to hear that!

@mohammadyousuf1567 Год назад

I am addicted to your style of teaching .. : )

@MonsterlessonsAcademy Год назад

Glad to hear that!

@dmytro-skh 11 месяцев назад

as for me reduce in the last example is too complicated to understand and debug. Nice for an interview but I would avoid such things in real code. I.e. if jun dev will have to work with that piece of code. In general good video, will look others on the channel too :)

@keneldridge 11 месяцев назад

I like Object.keys(counterObject).sort((a,b) => { return a > b ? -1 : 0 })[0]

@orz5516 10 месяцев назад

In the findVowels i would expect a senior developer would do it with an object because with includes that complexity is much higher. With an object you can just iterate the string once and check each time if the char is a vowel with O(1) complexity

@MonsterlessonsAcademy 10 месяцев назад

There are different ways. Object is also not ideal. Regexr is easier that const vowelCount = str => { const regex = /[aeiouAEIOU]/g const s = str.match(regex) return s ? s.length : 0 }

@orz5516 10 месяцев назад

@@MonsterlessonsAcademy And thanks for the videos, you are great!

@doniaelfouly4142 Год назад

thank you so much

@MonsterlessonsAcademy Год назад

Welcome 😊

@damienspectre4231 Год назад

For the first problem - I understand closures and you are returning a fucntion within the parent function that returns the secret. but Im curious - why not return the secret string directly instead of within the child function? its a const and its private to the someFn() and cant be modified once declared...

@MonsterlessonsAcademy Год назад

It was just an example to show closures. environment variables should not be written in code in any case.

@sliceem88 2 года назад

Best !

@MonsterlessonsAcademy 2 года назад

Thank you!

@jjjj5452 6 месяцев назад

Now just need to get an interview that asks one of these 5 questions...

@MonsterlessonsAcademy 6 месяцев назад

Good luck with that

@leojohn6702 9 месяцев назад

Quick question. Currently building my portfolio projects. But I have no knowledge of data structures and algorithms. Should i start training after my portfolio will be completed? Or prior the portfolio?

@MonsterlessonsAcademy 9 месяцев назад

Do a portfolio, CV and then improve your knowledge and add it. If you are a junior forget about data structures and algorithms at all. learn language and framework.

@OliaYarukhina 7 месяцев назад

Круто! Дякую! Цікаво звідки Ви, Олександре?)

@MonsterlessonsAcademy 7 месяцев назад

Originally Ukraine, last 8 years Germany

@testify7228 Год назад

Hi, For last question To get element which have max occurrence: After creating object, can we use .sort() nd do descending order based on Occurance nd then return first value from sorted object. Is it correct?

@MonsterlessonsAcademy Год назад

Hi, There are different ways to solve the same task.

@testify7228 Год назад

@@MonsterlessonsAcademy ok dude. Thanks for replay I saw ur 59 interview questions video course, really worth fir spending time in it

@dragosp.7635 Год назад

at 3:50. I see it also work const clone=object. Is it a good practice?

@MonsterlessonsAcademy Год назад

It is not. You assign the reference to the object and not a new object with a value. Try to change property of clone and check the value of both objects.

@amitkrishna2412 Год назад

Hi , Is there a document or a list of such interview questions that you have maintained?which I can follow?

@MonsterlessonsAcademy Год назад

No I don't have something like this. But I have a full course with 57 Javascript questions which covers all knowledge that you need. monsterlessons-academy.com/courses/javascript-interview-questions-coding-interview