Frequently Asked LWC Interview Questions & Answers

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Looking to nail your next LWC (Lightning Web Components) interview? 🚀 This video features a comprehensive list of frequently asked LWC interview questions, along with detailed explanations and examples to help you ace your interview! Whether you're a beginner or an experienced developer, this resource will help you brush up on key concepts and boost your confidence. Don't miss out on this essential guide to mastering LWC interviews - hit play now and take your skills to the next level!
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[@atrivedi1000]

Nice video you have covered all basic and really important questions

[@TechJourneyWithAnkit]

Glad you found this helpful

[@stoical_shorts1426]

Q.LWC is placed on record page and you want to get the record ud of the page. How can we do it? Ans :- import {LightningElement, api} from 'lwc'; export default class example extends LightningElement{ @api recordId; connectedCallback(){ console.log ('This is the recordId of the page', this.recordId); } } Record Id : {$recordId}

[@madhumohan2952]

In Html page we just need to keep {recordId} right ? no need of $ symbol

[@haribabuk5162]

lightning combox is used to display the picklist values of an object

[@TechJourneyWithAnkit]

Correct

[@vitthalrakh5715]

Thanks Ankit ,This is very Helpful can I get pdf for this Question and ans?

[@ad123441]

26.51 lightning:combobox

[@atulchopade9897]

33:01 We can use render method to switch between multiple html file, however it's not a life cycle method it's protected method provided by the framework. 33:01 we can create a public property with @api recordId to get Id from if the LWC component placed on record page.

[@TechJourneyWithAnkit]

Yes catch is render is not a life cycle method , but we can use the protected method to do that

[@anilkumarsahu8546]

simple but best and excellent!!

[@TechJourneyWithAnkit]

Thanks a lot 😊

[@deepalitiwari6561]

Question asked from me - 1. How to pass data from one component to another when they are not connected 2. How to we make callouts in lwc 3 . How we go next page in lwc 4. Can we have multiple js and html files in lwc ? 5. What should be the purpose and what are the benefits of having multiple js and html files 6. Catchable= true , how it functions at the backend how it helps in fetching the data

[@TechJourneyWithAnkit]

Few of them already covered in part 2. Remaining will cover in part 3

[@Saptarshi_101]

Hey Ankit First of all thanks for the awesome contents. I had a doubt for Wire and connectedCallback order of execution scenario how many times the console log will be printed ? Even though wire is called twice I can see its getting printed only after connectedCallback. Clarify if possible.

[@TechJourneyWithAnkit]

Wire be be called twice but return data only once

[@thalurumahendrababu]

First question answer is using RenderedCallBack we can achieve it and Second question answer is Using Wire Decorator we can achieve it.

[@TechJourneyWithAnkit]

It's not renderedCallBack, it is render method

[@NingannaKamalapure]

Lightning-combobox is used to display the picklist value to ui

[@TechJourneyWithAnkit]

Correct

[@bandivamseekrishna973]

1. render() 2.In js file we write the @api recordId

[@TechJourneyWithAnkit]

Correct

[@SolitudeStar2226]

@techJourneyWithAnkit as i understand render() is not the part of life cycle.

[@ravigrover1923]

Answer 1 : using render() method we can control which template will be visible Answer 2: In the controller of your LWC you can create a @api property with name recorded like below: @api recordId;

[@TechJourneyWithAnkit]

Yes, correct

[@pranaysawarkar7071]

hello ankit how are you i saw this video for my interview preparation in life cycle hooks you include only 5 life cycle hooks like constructor, connected callback, render callback, disconnected callback, and last one is error callback might be render is also consider as life cycle hook they are 6 might be not 5 can you please explain why you consider 5 only in ans.....!

[@TechJourneyWithAnkit]

No, the render method in Lightning Web Components (LWC) is not technically a lifecycle hook. It's a protected method in the LightningElement class that's similar to lifecycle hooks and is used to conditionally render a template.

[@pranaysawarkar7071]

But most of the people consider render as life cycle hook

[@luciferbhoi]

Hi Ankit, what are your thoughts of Data cloud, it is going to be the next big thing in Salesforce ecosystem?

[@TechJourneyWithAnkit]

Definitely it will be. Data Cloud + AI is future

[@luciferbhoi]

@@TechJourneyWithAnkit Salesforce is pushing towards CRM+AI+Data with trust. I have started learning data cloud

[@lalithaprathyusha8070]

@@TechJourneyWithAnkit Any series you will be planning on it

[@momanddaughterchannel3938]

Render method

[@haribabuk5162]

"When will the next class be?"

[@TechJourneyWithAnkit]

Soon

[@momanddaughterchannel3938]

2. @api to get recordid

[@TechJourneyWithAnkit]

It should be @api recordId

[@harmeetsandhu8238]

1.Render Method 2.@api recordId

[@TechJourneyWithAnkit]

Correct

[@SolitudeStar2226]

Hi Ankit, As per question, render should be the answer because it is not part of life cycle.