Javascript Interview Questions ( Objects ) - Output Based, Destructuring, Object Referencing, etc

#JavascriptInterview #Javascript #FrontendInterview
Javascript Interview Questions on objects will be discussed in this video including topics like Object Destructuring, Object Referencing, Spread and Rest Operators, Shallow vs Deep Copy, Ways to clone an object and much more!
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00:00 Intro
00:29 What are Objects?
01:04 Working with Objects
02:19 Interview Question on delete keyword
04:15 Computed Properties
05:36 Looping through Objects
06:38 Ques 1 - Output Based
07:14 Ques 2 - Implement this function ?
08:53 Ques 3 ( Important ) - Output Based
10:25 Ques 4 - Stringify vs Parse
13:39 Ques 5 - Spread Operator
14:17 Ques 6 - Spread Operator
14:55 Ques 7 - Output Based
15:35 Ques 8 - 'this' keyword
16:54 Ques 9 - Destructuring
19:04 Ques 10 - Output Based
20:06 Ques 11 - Object Referencing
21:11 Ques 12 - Object Referencing
21:50 Ques 13 - Object Referencing
22:56 Ques 14 - Output Based
24:35 Ques 15 - Output Based
26:08 Ques 15 - Shallow vs Deep Copy
26:47 Ques 16 - 3 Ways to clone an Object
28:26 Written Blog link in description
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Special Thanks to our members -

[@RoadsideCoder]

🔴 Get my Complete Frontend Interview Prep course - roadsidecoder.com/course-details

[@prangshugogoi5624]

Kindly make a video on interview questions on cookies , local storage & session storage … also to mention nice explanation on the topics , Thank you 🙏

[@chinmoyborah376]

For me , a great video for revision. Thanks. Just a minor thing I would like to add for deep and shallow copy. While we use Object.assign({}, obj) or use spread operator {...obj} , only the primitive objects inside the main object gets deep cloned into new object. For the nested objects, only the reference is stored, which is basically shallow copy.

[@girishanavani8620]

Great video! Also, a video on local storage, session storage, and Indexed DB with the use case would be a great one.

[@ashishmadan5700]

I didn't find such a great video on Internet !! Thanks, man for such amazing content❤️Keep posting such content !!

[@abdelrahmanelsaadany892]

I didn't know this video existed! Thanks bro! Really grateful.

[@karthikkonathala3002]

Yes, please make a video on differences between session storage, local storage and cookies when and how to use them

[@DeepakSingh-eq8jl]

Yes, please make some more lectures on interview questions including session and local storage

[@juniorWeb247]

Really really help to me, thank you much brother. You are really doing a good job. God bless you, man.

[@prabhneetsingh13]

This was such a great video, it cleared so many small small concepts of mine

[@makingeliteinfotech5305]

Thank piyush , I recommend your videos to everyone

[@avinashverma5538]

awesome video, helps a lot to clear concepts about objects. Thanks

[@deepakkolare]

Great explanation! Object.freeze and Object.seal could have been added to the video.

[@trendingindia972]

Excellent video as always brother thank you

[@user121304]

Hi Piyush, Thank you for this wonderful series. Please make a tutorial on LocalStorage, Session storage and cookies. Will appreciate it. Thanks!!!

[@abhishekkerketta9722]

Please make a series of output based....It would really be very helpful.....

[@Haffiz.siddique]

This video was so life changing, keep up the good work

[@srinivasak4087]

nice clear explanation , Thanks Sir!

[@hamid.mahmood96]

Yes please make a video on local storage and session storage

[@shubhambhardwaj1019]

Explanation 👌

[@smordefx7688]

works great and without any problems

[@ambesapaulos4323]

the way you teach is wonderful keep it up

[@ansarisuhail5127]

Such a great video🎉

[@k.ksharma4457]

great explanation as always u do 👍 and yes ye dil mange more 😀 so plz post a video based on local storage cookies and sessions deeply

[@kumar_awadhesh]

Good job 👍👍 Thank you

[@shash0_0]

Your content is highly underappreciated. Thanks for your work!

[@RoadsideCoder]

I appreciate that!

[@abhishekvishwakarma9045]

Nice Explanation 🔥

[@nishachapte7]

Thanks..Amazing and very useful video.

[@ajithk.s7848]

Good and specific content.. 👌

[@100bi8]

ThankYou Prabhu ❤❤

[@lucaliebenberg7565]

Great video Piyush 💯 would you be able to please do a video on interview questions related to local storage, sessions and cookies?

[@sunilr.v.6345]

how well you have explained such complex topics ... great work ....keep it up ..!!!!

[@RoadsideCoder]

Thank you, I will

[@princeverma6533]

Great Video, Please make video on cookie, session and local storage with examples

[@SalmanKhan-lx9kp]

waiting 🔥

[@kitchen-e-kausar9105]

Great video, thank you. For the last question I'm confused, Object.assign and spread operator, do they really create a deep copy? Would have been great if the video ended with the sone nested object examples.

[@BrijeshSingh-dp1ku]

Please make video on local storage, session storage and cookies ... It will be great help 🙏

[@ashuprakash6697]

Can you provide a link or something related to property you discussed at timestamp 22:32, where you set person to null? It would be really helpful.

[@kanchanmatai4170]

Very nicely explained about json.parse and json.stringify with their use case. Please make more such videos on intserview questions based on output and coding.

[@santhoshburgula6952]

Bro, I have gone through some videos, you are simply rocking and just you inspired me a lot. what should I do to pro in javascript like you ? is there any best book for javascript and as well as practice problems? please refer to any suggestions and root map. by the by, im from Non-IT background.

[@osamajune9]

You are great ❤

[@hareshdhanani2073]

Thanks.

[@pratikwadekar4981]

JSON.stringify and JSON.parse will only work on JSON safe objects. If the objects contain functions, symbols or dates that won’t create a deep clone

[@tpadma7419]

100% interview preparation..........very very thankfull...waiting for more such videos.....

[@RoadsideCoder]

Checkout the full course here - roadsidecoder.com/course-details

[@VishalSharma-rn7mt]

Awesome

[@tamilselvans147]

Hi bro, nice session. Pls do a video for How to make api's very secure?.. what are the possibilities? Jwt, Refresh token, etc

[@DevangPatil]

Amazing..

[@RahulKumar-ew1qw]

Please make vdo on local storages, session, cookies And cache too.. Thanks you bro in advance.

[@cloud9656]

Please create more videos for this playlist. Thanks

[@amanmalhotra8730]

awesome ❤❤

[@salonipande6190]

Yes please make video on localstorage n session n cookies

[@instinct_gallant8694]

TNice tutorials tutorial was worth it, I understood everytNice tutorialng now

[@SamruddhaShah]

Learn alot

[@himanshupandey3451]

great big fan now

[@subhramukherjee6990]

Good questions with great explanation.

[@RoadsideCoder]

Thanks a lot!

[@rakaa31]

please make a video on How much javascript is enough for interviews and what are the important topics to focus on for interviews

[@pavithrasai1392]

can you explain about cyclic structures and why we cannot apply json.stringify on them?

[@MrK-nb7xr]

Please make on cookies , local storage, session related stuff every things .. Thanks

[@chirag8250]

13:35 yes please!

[@ojaspalorkar7434]

Please make video on local storage session storage !!

[@kartik7775]

awesome videos, thank you!!!!!

[@RoadsideCoder]

Welcome!

[@jhaganb9215]

Can you make videos related to dsa using JavaScript for the dsa round in frontend interviews - also give some idea about how to get frontend internship opportunity while in college. hoping for your reply :)

[@ayushrastogi_]

Please create a video on interview questions asked about Local Storage and Sessions Storage.

[@HimanshuSharma-mx7yx]

Make a video on the loacal Storage, cookies and session storage

[@abcxyz5385]

Sir, please make video on session storage and local storage

[@techstudio2874]

excellent

[@RoadsideCoder]

Thank you! Cheers!

[@vipin3982]

Bro!!!!!!!!!!!!!!!Awesome Video

[@RoadsideCoder]

Thanks!!

[@andrei-gabrieldragomir]

good

[@floatingcloud5955]

2:27 fe = function expression You can assign a function() without 'function name' to a variable as value is called Function expression var a= function (){ }

[@yaduvanshiNK]

An IIFE (Immediately Invoked Function Expression) is a JavaScript function that runs as soon as it is defined.

[@prabhneetsingh13]

Kindly make a video on local storage, session storage and cookies

[@saikatbose2410]

Please make the video on local storage, session storage, cache and cookies etc

[@vijenderkumar3034]

Please make video on local and session storage and cookie

[@V_Prahlad]

You are gor for me.

[@RoadsideCoder]

Gor?

[@ShubhamPatil-rr4on]

Read it.....👉 Most welcome brother,lot of people watching you , yesterday I watched technical suneja live and thaire one of the people tell to Ajay sir that's I'm watching roadside coder js videos.and Ajay sir also appreciate it.💯♥️👍 Keep it up

[@RoadsideCoder]

Oh wow bro, can u provide me the timestamp of that video where he said that?

[@BrijeshSingh-dp1ku]

@@RoadsideCoder 32.25

[@ShubhamPatil-rr4on]

32:25 Yesterday I shared you timestamp but I don't know how it will didn't upload. Can we connect on LinkedIn I have some few queries if you help me out it will lot toe.

[@RoadsideCoder]

@@ShubhamPatil-rr4on Sure

[@SachinKumar-bb2yn]

Please make video on local storage

[@20TUEC012ATHILAKSHMI.M]

kindly make video on localStorage session

[@sidd_shaikh]

Hello sir if the object is deeply nested then how can we make deep copy

[@xync1252]

Portfolio making please

[@user-wq4hm4wr4r]

make video on local storage and session storage

[@Krishnasaini]

Where to practice more about these topics?

[@codictive]

pls make video on storage

[@xync1252]

Please make portfolio video egarlu waiting...

[@kmsnymisha4607]

Can you please explain why the members array remained same when person is set to null and why it changed to null only on changing the name property in the person object at 21:50

[@RoadsideCoder]

Because we are reassigning the value which replaces the previous object, but in case of name properly, we are changing the value of that key which has the reference to the original object.

[@bandaumamahesh9346]

Bro can you please tell me some good books for javascript and react.

[@cb559]

on timestamp 18.10 we are not renaming the value of name , we are assigning the value of name to myName .As renaming means changing the value of name to other string Please correct me if i am wrong

[@rahulrathod8959]

Hi. But we can't reassign to a constant variable. As personObj1 is constant variable then why it is able to reassign in the function changeAgeandName?

[@mrrishiraj88]

👍

[@shahzoobgouhar2334]

Fellow devs below is a Polyfill for deep copy function deepCopy(obj) { if (typeof obj !== 'object' || obj === null) { return obj; } var copy; if (Array.isArray(obj)) { copy = []; } else { copy = {}; } for(key in obj) { copy[key] = deepCopy(obj[key]) } return copy; }

[@prasoonmishra6288]

🤩🤩🤩🤩

[@karthikeyasoft]

I have little bit confusion over changeAgeAndReference topic time 25:50 personObj1 how come age : 25

[@kedarkulkarni0074]

Bhai please problem solving ka bhi , sirf list of problems Jo usually FE me puchte hai.

[@RoadsideCoder]

Yes I have planned that too

[@nishantshah_]

Object.assign and destructuring creates shallow copy only.

[@ranajoyghosh1008]

You guys should consider getting Caustic 3, it helped understand the basics I tNice tutorialnk it´s even free for PC, on the phone it costs a little.

[@keyurgolani956]

When video on this keyword is coming. Very confusing and many scenarios where it behaves differently. Eagerly waiting!

[@RoadsideCoder]

Soon

[@emilyaung2963]

Hey wouldn't Object.assign({} , user) and the spread operator do shallow copy? vs the JSON.stringify and parse will do deep copy?

[@deepakkolare]

Object.assign and spread are shallow copy for nested object for direct properties it’s a deep copy.

[@RoadsideCoder]

Yes I've mentioned that this doesn't work for nested properties.

[@keshavgaur1886]

I have been asked about how to print keys i was knowing the concept of foreign loop but don't know what happened during the interview was not able to tell that

[@sachinkr0405]

problems and than volu automate the boi cuz I didn’t know how to sidechain. My one buddy produces riddim and he legit saw my daw

[@rams9169]

Hi all... i have small doubt for the below object...how to find key and value both ("second " : 2) in the below object..please i need your solutions const iem = { "first" : new Date(), "second" : 2, "third" : "test" }

[@ayushtiwari-zm1co]

Bhai big fan please reply 🙏🙏🙏

[@RoadsideCoder]

😂

[@JohnSnow-gi7iv]

Is a career in frontend a good long term option? I feel a career in full stack or backend is better in long term? Your opinion will be helpful on this.

[@RoadsideCoder]

Yes ofcourse it is! Why would you think that?

[@shivambln]

Great but some object methods are missing ..... Like freeze and all