Top 100 JavaScript Interview Question and Answers - HINDI

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  • Опубліковано 3 лют 2025

КОМЕНТАРІ • 211

  • @youcan4576
    @youcan4576 9 місяців тому +26

    00:02 Preparation, focus, and revision are crucial for interviews.
    02:25 JavaScript plays a crucial role in web development.
    08:04 Let and const create block-scoped variables in JavaScript.
    10:59 Const keyword in JavaScript
    16:11 JavaScript's trim method removes white spaces from the beginning and end of a string.
    19:32 Selectors in JavaScript help to get specific elements from DOM based on ID, class names, and tag names.
    24:02 Introduction to JavaScript data types
    26:23 Understanding JavaScript data types and operators
    31:17 Overview of logical and string operators in JavaScript
    33:37 JavaScript Control Flow
    38:04 Understanding different types of loops in JavaScript
    40:20 Function calls and execution
    45:06 Arrow functions in JavaScript are a concise way of defining functions.
    47:25 Understanding and structuring unstructured data
    52:34 Understanding objects, properties, and methods in JavaScript
    54:57 Variables accessibility and hosting in JavaScript
    59:34 Error handling using try and catch blocks and synchronous programming in JavaScript
    1:01:54 Understanding non-blocking and synchronous code in JavaScript
    1:06:19 Primitive data types in JavaScript do not support mutation, while non-primitive data types like arrays and objects do.
    1:08:55 Difference between primitive and non-primitive data types in JavaScript
    1:13:40 Undefined variables are automatically initialized with undefined.
    1:15:48 Identifying variable types using type of operator
    1:20:25 Comparison and type coercion in JavaScript
    1:22:52 Explaining unary, binary, and ternary operators in JavaScript and Short Circuit Evaluation
    1:27:42 Short circuit evaluation is an efficient way to stop evaluation when the result can be determined early
    1:30:08 JavaScript conditions, operators, and ternary operator
    1:34:54 Difference between double equals and triple equals operators
    1:37:18 Spread operator in JavaScript
    1:42:08 Rest and spread operators in JavaScript
    1:44:26 Find method gets the first element that satisfies a condition
    1:49:15 Difference between push and concat methods
    1:51:46 Differences between pop and shift methods of arrays
    1:56:39 Slice, Splice, Remove, and Replace methods in JavaScript
    1:58:51 Map and forEach are array methods for modification and iteration.
    2:03:23 Understanding array modification and sorting in JavaScript
    2:05:30 JavaScript provides methods to sort and reverse arrays, and array restructuring is important for data organization.
    2:09:47 Array-like objects in JavaScript have limitations compared to regular arrays
    2:11:57 Ways to convert an array-like object to an array
    2:16:23 Difference between for and while loops
    2:18:33 Flow diagram of the do-while loop
    2:22:47 Difference between for and for of loop
    2:25:23 Explaining the difference between for of and for in loop in JavaScript
    2:29:55 Iterating over properties of objects using for..in loop
    2:32:14 For of loop provides more control and is suitable for iterating over each element.
    2:36:49 Understanding when to use named functions and anonymous functions
    2:38:56 Function expression in JavaScript
    2:43:30 Callback function passed as an argument to another function
    2:45:53 Understanding higher order functions and callback functions
    2:50:47 Ways to pass arguments to a JavaScript function.
    2:52:52 Default parameters in JavaScript functions
    2:57:15 Treating functions as variables in JavaScript.
    2:59:34 Pure functions always produce the same output for the same input.
    3:03:59 JS functions can have side effects
    3:06:08 Introduction to higher order functions
    3:10:45 Understanding the usage of call, apply, and bind in JavaScript
    3:12:55 Understanding JavaScript context and the differences between call, apply, and bind methods.
    3:17:36 JavaScript string manipulation and templates.
    3:19:52 String Interpolation and Multiline Strings in JavaScript
    3:24:29 Different methods for concatenating strings and DOM manipulation in JavaScript
    3:26:43 Understanding event handling and DOM manipulation in JavaScript
    3:31:11 Difference between text content and inner HTML
    3:34:11 Adding and removing properties and styles in HTML elements using JavaScript
    3:38:45 Understanding the creation and manipulation of elements in the DOM
    3:41:11 Difference between create element and create text node
    3:45:56 Understanding the purpose of the throw statement in JavaScript
    3:48:13 The 'typeof' operator finds the data type of a variable.
    3:53:04 Understanding error handling in JavaScript
    3:55:14 Types of JavaScript Errors
    3:59:39 Differences between arrays and objects
    4:01:58 Difference between dot notation and bracket notation in JavaScript
    Crafted by Merlin AI.

  • @davidgajendra3375
    @davidgajendra3375 Рік тому +21

    Thanks a ton sir, I got laid off last year March, where I have worked almost 2years as a software Engineer and worked on bug fixing, maintenance of project, software installation and many more devops practices, but not confident that what I worked? What are the my skills set? I ahe applied for many companies, given 3-4 interviews with under-confident but insulted and rejected. Then I will decide NO JOB for 3-4 months, literally I was enjoying 4months and not serious about the next job..... but after 4 months of long vacation period I have started upskilling to boost my confidence, I have learnt a lot from your videos like HTML and CSS, now I am learning Java Script my confidence are boosting now, parallel I am learning devops from the LearnVern plateform, now I can say I will get job better than last job. thanks again sir.
    ++ I will share my success story soon....

    • @rahul00sharma
      @rahul00sharma 11 місяців тому +3

      I am a fresher, if possible can you give me a referral. I am 23 passout.

    • @tarunpatidar
      @tarunpatidar 7 місяців тому

      You work in a company

    • @Humanity64397
      @Humanity64397 Місяць тому

      Bhai Job laga apka ? It's been 10 months

  • @YashwanthM-h5b
    @YashwanthM-h5b 10 місяців тому +2

    2:13:30 ........................ In JavaScript, when you use the spread syntax (...) on an object like {0:'a', 1:'b', 2:'c'}, it only works for iterables like arrays. Objects are not directly iterable with spread syntax.If you want to convert the object a into an array of its values, you should use Object.values() method.

    • @SatishSinghSigma
      @SatishSinghSigma 5 місяців тому

      it only works when their is length of the object also present else it will not work in all two case which you are talking about

  • @snehalmhatre6852
    @snehalmhatre6852 2 години тому

    2:14:56 Loops
    2:33:51 Functions
    3:17:14 Strings
    3:25:04 DOM
    3:44:01 Error Handling
    3:56:35 Objects
    4:27:55 Events

  • @creativeminds9329
    @creativeminds9329 2 місяці тому +1

    Thankeww so much sir because of you i clear my first round of react interview

  • @jaiswalsourabh8027
    @jaiswalsourabh8027 Рік тому +12

    please bring same video for react js and node js .
    it will be very helpful thanks a lot for all ur efforts

  • @Ameet-v9o
    @Ameet-v9o 2 місяці тому +1

    Absolutely 💯! It was a fantastic JS Video. i have completed it in one go..... Thank you very much !

  • @engineersINnight
    @engineersINnight 10 місяців тому +2

    Hello Happy Ji. Your interviews Questions are more helped me to get 2 Offers Letters with Salary Hike. Please keep it on. These videos will help more persons like me. also Please create a 100 FAQs on jQueries too.

  • @user-py1gn4kq5v
    @user-py1gn4kq5v 9 місяців тому +3

    I cracked my interview recently thanks sir

  • @avinash3701
    @avinash3701 Рік тому +1

    You deserve a ton of subscribers. I personally watch and learn from lot of UA-camr but you are something different, you only talk about necessary and important stuff. Thanks alot sir wish i discover your channel earlier

  • @aysell-os1cy
    @aysell-os1cy 6 місяців тому

    1(ii). 36:33
    2. 1:04:42
    3. 1:21:46
    4. 1:42:16
    1:59:35 map()
    2:05:51 array destructing
    5. 2:14:29
    2:25:51 for...of and for...in
    6. 2:34:07 functions imp
    10. 3:56:36 objects

  • @Mounica19
    @Mounica19 7 місяців тому

    This video is extremely helpful to crack the interviews Sir. After revising and getting aware of the concepts through this video, I was able to crack 3 interviews from MNC. Thanks a lot Sir. Your work is appreciable.

    • @interviewhappy
      @interviewhappy  5 місяців тому

      Congratulations, and may this be just the beginning of a fulfilling journey filled with even greater accomplishments!

  • @MB26566
    @MB26566 Рік тому +3

    First of All your videos are very useful and helpful to crack the interviews.Kindly make a interview series on microservices and azure. Also keep adding videos on regular basis of problem solving about DSA and coding interview questions. Thanks.

  • @Tarun8336
    @Tarun8336 9 місяців тому

    4:49:34 = use of "this" keyword
    4:52:54 = remove event handler from element

  • @chiragkalra1
    @chiragkalra1 9 місяців тому +4

    Sir thank you mera frontend developer ka interview crack hua❤❤❤

  • @adityatripathi931
    @adityatripathi931 4 місяці тому

    Thank You sir, with your video and learning from your video got me selected in one of the startup for React.js developer. Thank You so much. Will be passout in 2025.

  • @AjeetYadav-tb7gs
    @AjeetYadav-tb7gs 9 місяців тому

    The way you cover all question and answer i think you cover full javascript course in one video thanks sir for this lecture🤗

  • @ombhatt9064
    @ombhatt9064 8 місяців тому

    Thank you, sir, for this amazing video. This is the best JavaScript interview questions and answers video I have ever seen.

  • @rishusingh5483
    @rishusingh5483 6 місяців тому +1

    you are great but if you make a one more new separate video for only JS basic and advance fundamentals, coding test basic to advance and all keywords of JS so I complete my JS course and one thing please sir make one new video for JS basic and advance course different to all youtube videos and please cover all topics in Hindi.

  • @kuldeepchoudharydheemawali6615
    @kuldeepchoudharydheemawali6615 9 місяців тому

    Thanks sir after watching your ReactJs and javascript video I got selected as MERN stack developer

    • @interviewhappy
      @interviewhappy  9 місяців тому +1

      Great 👍 Congratulations on your incredible success.

  • @fabihaafrosehridita9835
    @fabihaafrosehridita9835 4 місяці тому +4

    congratulations to me that I finished the whole video at one go

    • @interviewhappy
      @interviewhappy  4 місяці тому +2

      Excellent and all the best for your career.

    • @sachintomar5686
      @sachintomar5686 23 дні тому +1

      To apne sahi kiya bahut bahut badhai

  • @mzohaib27
    @mzohaib27 11 місяців тому

    sir thank you so much.... now I'll definitely select in the interview after completing this..... InshAllah.....

  • @CodeWithAmitSharma
    @CodeWithAmitSharma 7 місяців тому +3

    several 4 hours and 57 minutes long JavaScript videos in the past few days, and I have taken notes in my notebook myself. By doing this, I have learned 50% of the content. I will learn the remaining in the revision. Watching your videos has given me 100% confidence that I will now clear the interview without any problem. Thank you sir, a billion times.
    Sir, I request you to please create interview questions video on Angular in Hindi so that I can learn even better.
    ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

  • @pratyashkumarmohanty4820
    @pratyashkumarmohanty4820 Рік тому +3

    Very useful session happy.
    This is really cool.
    Eagerly waiting for your Azure services session ❤❤
    Thanks a lot

  • @bharatinfrastructurefacts3138
    @bharatinfrastructurefacts3138 5 місяців тому +4

    Thanks a lot sir , I got a job at the role of Jr software Engineer just by revising Javascript and ReactJS through your videos a night before the interview.

    • @manisha6018
      @manisha6018 4 місяці тому

      did you apply for off campus? which company?

    • @hiarun01
      @hiarun01 Місяць тому

      Which company bro?

  • @kartikkrishnaindoria
    @kartikkrishnaindoria 8 місяців тому

    Happy sir .. I'm very happy to watch your video ..

  • @User-vw7li
    @User-vw7li 4 місяці тому

    Please make a video on SQL also. Your videos are really helpful and i like the way you teach ❤❤

  • @vikassen73
    @vikassen73 27 днів тому

    sir jitna paid pdf me bataya h utna long video bhi banaya kro bahut best video h pure youtube me agar koi samajh sake to...

  • @adktherookieguitarist442
    @adktherookieguitarist442 11 місяців тому +3

    Going for my first interview sir , wish me all the best😄

  • @lovishduggal9064
    @lovishduggal9064 Рік тому +5

    Please bring same video for react js and node js.
    Thankyou

  • @Alkane051
    @Alkane051 9 місяців тому

    thank u sir for using hindi ... sub clear hogaya thanks alot..

  • @JsTectStar
    @JsTectStar Рік тому

    Sir, please correct me If I'm wrong. map() method creates a new array after implementing the operation but it doesn't mutate the original array nor forEach() method. ??
    duration: 2:02:50, you have mentioned that map() change the original array

    • @vanshikarajsharma
      @vanshikarajsharma 26 днів тому

      The main difference between forEach and map is that forEach does not return anything (it returns undefined), while map creates and returns a new array. forEach is used to perform an action on each element of an array, such as logging or modifying the elements, but it doesn’t generate a new array. On the other hand, map is used when you want to transform the elements of an array and get a new array with the transformed values. Neither forEach nor map modifies the original array-they both work on a copy of the array instead.

  • @vivekkumar-mx1mv
    @vivekkumar-mx1mv 6 місяців тому

    Hi sir,
    I have learnt a lot from your videos from video and it help me alot.
    Can you please also create the Logical coding interview question asked in top companies and also so that it can also help people to grow.
    But apart from you video help people alot in cracking interviews.
    so thanks a lot sir.

  • @CompoundBenzene
    @CompoundBenzene 4 дні тому

    Thanks for the video sir

  • @caveatashish
    @caveatashish 3 місяці тому

    Can we add pure function in this list 41:30 mins or is they part of any of the existing

  • @bilalarshad2092
    @bilalarshad2092 10 місяців тому

    Thanku Sir Aap boht acha sekhaty hn

  • @ishabiswas7477
    @ishabiswas7477 4 місяці тому +1

    Sir, I wanted to ask that can I watch this for my class 12 boards to cover my javascript portion, is it enough to make me capable to answer all type of js questions ? Sir please answer I have my exam tomorrow.

    • @interviewhappy
      @interviewhappy  3 місяці тому

      Sorry I am late. For school candidates first 30 questions are good enough.

  • @kishorburkul3368
    @kishorburkul3368 Рік тому +1

    promises and asyn await and closure this questions not cover on this video .other all topics cover , very useful keep it up thank you so much

  • @ombhatt9064
    @ombhatt9064 10 місяців тому

    Thanks a lot sir..Its really helpful

  • @AbhijeetDeshpande-s8y
    @AbhijeetDeshpande-s8y Рік тому

    Its really good technical JavaScript interview questions video really it will help. Thanks a Lot for good proper explanation for each and every question with answers. Thank you so much

  • @dharmpalsingh7752
    @dharmpalsingh7752 27 днів тому +1

    Sir react js ka bhi interview questions answers ka series bana do🙏

  • @anilguniganti8900
    @anilguniganti8900 10 місяців тому

    Sir, I would appreciate it if you could add the Angular interview Q&A as well. Your Udemy course is something I have been waiting for. Please prioritize this.

  • @poojalahane2584
    @poojalahane2584 8 місяців тому +1

    THANK YOU SO MUCH, I WILL COME BACK HERE AFTER GETTING JOB.

  • @dilipbaghel9535
    @dilipbaghel9535 Рік тому

    amazing video sir, sir please segregate the video duration into the different sections according to the chapters, it will help students for future reference of any particular question

  • @mayurchaudhari4239
    @mayurchaudhari4239 9 місяців тому

    Thank you so much sir for your efforts learned a lot from you

  • @Hyper_emotional_quotient
    @Hyper_emotional_quotient 11 місяців тому

    this is very helpful notes......thank you so much but one ans miss in chapter 1 basic 2 (which is JSON

  • @deepakkumar860
    @deepakkumar860 Рік тому +1

    Thank you so much sir for your efforts learned a lot from you 🙏

  • @aaravaryan7382
    @aaravaryan7382 11 місяців тому +1

    "this " used inside function is this possible to do so for current context with out call(),apply() ??? bcz "this " only work with object

  • @Loko-q7n
    @Loko-q7n 2 місяці тому

    thanks a lot sir for this detailed video

  • @harshalpatil2642
    @harshalpatil2642 9 місяців тому

    thanks a lot sir ! very helpful video for an interview....

  • @palashshrivastava3441
    @palashshrivastava3441 Місяць тому

    I'm a .Net + React developer with almost 4 years of experience, I have gone through all your videos of interview questions on .NET, React, Javascript. Will that be enough to crack most of my interviews?

    • @interviewhappy
      @interviewhappy  Місяць тому

      Yes my friend
      You're already well on your way! Good luck with your interviews.

  • @behappy00018
    @behappy00018 11 місяців тому

    42:08 I will definitely share my success story with you . And I am waiting for that moment .

  • @cybercafeinquari4137
    @cybercafeinquari4137 Рік тому

    Hii sir thank for this valuable knowledge...I leaned complete this video and I'm very interested to learn.. please make video of express js and node js same as a this
    Video ❤❤❤😊😊😊😊

  • @ramprasadchauhan7
    @ramprasadchauhan7 Рік тому +1

    Nice , very helpful video. Sir please also make interview video for React

  • @003abdullahahmed5
    @003abdullahahmed5 6 місяців тому

    thanks a lot sir, C++ interview question

  • @Programmingwithva
    @Programmingwithva 6 місяців тому

    Thank you for giving this content

  • @ShubhashMalakar-bv9xw
    @ShubhashMalakar-bv9xw 9 місяців тому +1

    Good explanation sir ji

  • @kashinathjadhav007
    @kashinathjadhav007 Рік тому

    Thanks for Very useful & helpful session.. also add questions on promises ,async & awaits as well

  • @sandeepkumarg1889
    @sandeepkumarg1889 Рік тому

    MAZA aa gya sir ji amazing video and the way of teaching amazing no one can do over the internet

  • @sajanverma4046
    @sajanverma4046 Рік тому

    thankyou sir Ji yese react ka video bana doh jisse bohot sare interview Question hoh jisse frontend meh job meh ashani hoh aur bad meh agar time mile toh html and css also but ye sub hindi meh hoga toh hamare bohot kam aayega dear sir

  • @satyadev_k
    @satyadev_k 2 місяці тому

    Tomorrow is my interview, will update later if it helped me

    • @interviewhappy
      @interviewhappy  2 місяці тому

      Good luck! I hope it helps you ace your interview.

  • @tariqalvi6771
    @tariqalvi6771 Рік тому

    Thank you very much Sir. You are really good and hardworking. Your videos are always helpful.

  • @snehakar7929
    @snehakar7929 2 місяці тому

    please make a video for React native interview questions

  • @webdesignfx
    @webdesignfx Рік тому

    Perfect 💥

  • @quazisamihatasnim792
    @quazisamihatasnim792 11 місяців тому

    Thank u sir

  • @jahangirxl
    @jahangirxl 11 місяців тому

    Can you please create a video on API in JavaScript -- integration, getting data, updating etc ... please

  • @shitalkarhale9490
    @shitalkarhale9490 11 місяців тому

    Please bring interview videos on Advanced topic of javascript,React and redux toolkit

  • @letsreversetheclock
    @letsreversetheclock Рік тому

    Helpful video ❤

  • @nainisayn9872
    @nainisayn9872 Рік тому

    Finally in urdu i was alot waiting ❤

  • @123mutahir
    @123mutahir Рік тому

    Thank you so much Sir....

  • @ankushnain08
    @ankushnain08 10 місяців тому

    thnx sir all video in best video sir

  • @OmShreeji
    @OmShreeji Рік тому

    TOP 50 HTML CSS Bootstrap Interview Questions hindi main bhi video banao

  • @ayushsaraswat01
    @ayushsaraswat01 11 місяців тому

    sir Apne promises and aage k topics nh cover krwae iss video m !!

  • @maazshaikh7905
    @maazshaikh7905 Рік тому

    Sir make please interview questions on HTML and CSS also. Top 50 questions in MCQ format or theory would be beneficial.

  • @Keshari01
    @Keshari01 5 місяців тому

    Sir java kis tube channel se kare from beginning

  • @SwapnilKumbharkar-v4g
    @SwapnilKumbharkar-v4g Рік тому

    very nice session

  • @gaganrajpal9571
    @gaganrajpal9571 9 місяців тому

    Great Sir

  • @amitbiswas54
    @amitbiswas54 2 місяці тому

    excelent

  • @Moviestorrent166
    @Moviestorrent166 Місяць тому

    Sir please next js interview series le aayiye

  • @priyankasaini7204
    @priyankasaini7204 Рік тому

    Thank you🤗

  • @margamakhila
    @margamakhila 8 місяців тому

    Hi Sir, I am working currently as web developer from 2 years and Want switch job , Please suggest me how to prep for interview . please reply for this comment

  • @imranansari-lp5rm
    @imranansari-lp5rm 4 місяці тому

    Hello Sir video on php developer Interview questions pe laye.

  • @bhargavnirmal7652
    @bhargavnirmal7652 8 місяців тому

    sir can you please make interview series for PHP ?

  • @phpboosters
    @phpboosters 5 місяців тому

    Hi could you please help to how to stop clicking window close button using javascript or jQuery.Based on some conditions I need to implement this feature so user not close the window untill user fill the

  • @salma.hamido
    @salma.hamido Рік тому

    Thank you very much for your effort.
    Can you please add the timestamps in the description?

  • @atishayjain3013
    @atishayjain3013 9 місяців тому

    Thank you sir

  • @abhishekpatel6582
    @abhishekpatel6582 Рік тому

    Thank you so much sir

  • @SansabilDiary
    @SansabilDiary Рік тому

    Please make video in java....... Video is very helpful

  • @ajaysinghrathour8622
    @ajaysinghrathour8622 Рік тому

    2:35:16 - function

  • @kunalpatil7259
    @kunalpatil7259 6 місяців тому

    thanku sir

  • @saxenabhavesh6941
    @saxenabhavesh6941 Рік тому +1

    Sir are this series is enough to crack frontend interview

  • @vinayrajput5227
    @vinayrajput5227 Рік тому

    nice interview question sir

  • @maazshaikh7905
    @maazshaikh7905 Рік тому

    Sir please make videos on coding questions also. Thanks in advance.

  • @avanishexplorer
    @avanishexplorer 11 місяців тому +1

    Thanks you completed and covered each and every topic briefly

  • @nileshKhupase-k7w
    @nileshKhupase-k7w Рік тому

    very useful🤩🤩

  • @oliullah1856
    @oliullah1856 Рік тому

    wow..joss from BD

  • @funandfood_hyderabad
    @funandfood_hyderabad 6 місяців тому

    Wish i had watched this earlier, same basic questions i couldn't answer in react interview, it was embarrassing

  • @MAYURPATIL-zx1nz
    @MAYURPATIL-zx1nz Рік тому

    aisa same video React js ke lie banaye sir please its my request... Since for javascript you previously uploaded 100 questions and answers but not for react... so please make 3-4 hours video on react it will go viral because there is no content on youtube like this for react... I will alone share in our 250 student group

  • @AshmitSinha-zp6ne
    @AshmitSinha-zp6ne 9 місяців тому

    Thanku u so much sir
    I am placed in Google california at 55lpa

    • @interviewhappy
      @interviewhappy  9 місяців тому

      Congratulations! Thumbs up on your accomplishment

  • @aashishgupta9392
    @aashishgupta9392 6 місяців тому

    1:00:27 asynchronous