Transcript for transcript_1B0GqfMI5erhc2YdaQOq8u0yiGmiNvTVr_3310_4264_16a8057c6056_11.txt

transcript_1B0GqfMI5erhc2YdaQOq8u0yiGmiNvTVr_3310_4264_16a8057c6056_11.txt

[00:00:15]  ¿Ahora viene?
[00:00:16]  Ya, bueno, yo estoy en la otra.
[00:00:19]  ¿Dónde está?
[00:00:31]  Is it okay?
[00:00:37]  Yes, please.
[00:00:47]  Are you a candidate or?
[00:00:51]  Mr.
[00:00:51]  Vishal, start with me.
[00:00:53]  Okay.
[00:00:57]  Okay.
[00:00:57]  Hi, Vinu, right?
[00:01:00]  Yeah, yes.
[00:01:01]  Yes, Vishal.
[00:01:02]  How are you?
[00:01:03]  Yeah, I'm fine.
[00:01:04]  You, Vishal?
[00:01:05]  Yeah, yeah, I'm also doing good.
[00:01:08]  Can you share your screen?
[00:01:10]  Sure.
[00:01:14]  And while sharing your screen, explain me what is the difference between
[00:01:22]  TypeScript and JavaScript.
[00:01:28]  Basically used for the dynamic response.
[00:01:33]  It is used in the HTML and CSS so that it gives the styling and the responsiveness to the web page of the layout.
[00:01:49]  That script is nothing but
[00:01:57]  I think I read it somewhere but right now I don't remember.
[00:02:03]  That's okay, no problem.
[00:02:05]  Are you good in front end, back end both or what do you will choose first, front end or back end?
[00:02:13]  I say I'm good in both but my first preference would be in front end.
[00:02:18]  Perfect.
[00:02:21]  Okay, so do you know about tailwind CSS?
[00:02:25]  Pardon?
[00:02:26]  Tailwind CSS.
[00:02:27]  Tailwind.
[00:02:31]  Tell me when I don't.
[00:02:34]  Okay, what is CSS?
[00:02:37]  CSS is cascaded style sheets.
[00:02:40]  It is used to style organize so that it gives the output in the web page.
[00:02:51]  Clearly and organizably.
[00:02:56]  What will happen if we will not use CSS?
[00:03:00]  If we not use the CSS, there will be no styling to the
[00:03:09]  text or what we are doing in the web page in the HTML, it will be not styling.
[00:03:17]  Okay.
[00:03:19]  Do you know about Redux or Recoil anything or context API in React?
[00:03:29]  Context okay do you know use effect yeah use effect is in is a main purpose in the react where
[00:03:46]  It performs such operations where
[00:03:59]  Okay, so no problem.
[00:04:01]  Why we use states, use states in React?
[00:04:04]  And why don't we simply use variable like const a is equal to some variable?
[00:04:11]  Why we use use state?
[00:04:13]  Do you know what use state?
[00:04:15]  Yeah, I know what is a state.
[00:04:18]  In state...
[00:04:19]  Just tell me...
[00:04:20]  First, listen to my question.
[00:04:22]  My question, why we use useState in React instead of using simple variables?
[00:04:30]  to when props, when changing the props, we require use state.
[00:04:42]  Okay.
[00:04:43]  What is the difference between estate and prop?
[00:04:48]  Probably.
[00:05:00]  State is first I will start with state.
[00:05:03]  State is used when it is want to change or render something in the.
[00:05:12]  Web page and props is used to assign the values.
[00:05:17]  It is like a properties to assign the values.
[00:05:21]  Okay.
[00:05:24]  Okay, have you ever used Axios or fetch?
[00:05:31]  Fetch, yeah, fetch.
[00:05:33]  Okay, what is the use of fetch?
[00:05:35]  It is used to fetch the data when a request is sent from the user to the API.
[00:05:44]  Okay, do you know about authentication and authorization?
[00:05:47]  Yeah, authentication.
[00:05:49]  What is the difference?
[00:05:50]  Don't tell me what is authentication and what is authorization.
[00:05:54]  So just tell me what is the difference between authentication and authorization?
[00:06:00]  If I take the example, it will ask for the user authentication means it will ask the user username or password.
[00:06:14]  It is authentication.
[00:06:15]  Authorization means it will the person if the user is.
[00:06:22]  Eligible or not.
[00:06:25]  For the access.
[00:06:28]  Okay, got it.
[00:06:30]  Take a and go to amazon.com or .in anywhere.
[00:06:34]  You can take incognito mode or yeah.
[00:06:38]  Amazon.com.
[00:06:39]  Okay.
[00:06:39]  Yeah, Amazon.com.
[00:06:42]  Hit enter.
[00:06:45]  Click on login.
[00:06:51]  Sign in.
[00:06:52]  Yeah, click on just sign in.
[00:06:53]  Just click on sign in.
[00:06:55]  Yeah.
[00:06:55]  Here, there is an option, enter mobile number or email.
[00:07:01]  Yeah.
[00:07:02]  Okay.
[00:07:03]  So in React, how you will implement this feature?
[00:07:08]  Will you create two states for storing mobile number and another state for email or you will use only single state and justify your answer also?
[00:07:26]  Have you heard my question?
[00:07:28]  Yeah, yeah, Harvard.
[00:07:31]  Okay, then.
[00:07:36]  We use...
[00:07:39]  Use state because it modifies and it gives us a redundant to the UI also.
[00:07:46]  I'm asking if you will use one state or you will use two state because here in a single form, we have to authenticate user with his mobile number.
[00:07:58]  User can enter mobile number also.
[00:08:00]  Yeah, he can enter email also.
[00:08:03]  How you will send data to the backend?
[00:08:07]  In which state you will store?
[00:08:09]  You will use mobile number or email state?
[00:08:12]  Which state you will create?
[00:08:14]  You will create two state or you will create one state?
[00:08:17]  If you will create two state, then why you will create two state?
[00:08:24]  Will create a two state because here we are giving the authentication I mean giving like mobile number or email
[00:08:36]  that's why we use two states also two states but how you will differentiate like this particular is phone number and this particular is email
[00:08:48]  And before answering that question, do you know about space complexity and time complexity?
[00:08:54]  Any idea?
[00:08:56]  I don't think so.
[00:08:58]  Have you ever studied DSA?
[00:09:01]  Sorry?
[00:09:02]  DSA, DSA, data structure and then I know, yeah, I know about DSA, but
[00:09:10]  I didn't go in depth.
[00:09:13]  Okay.
[00:09:14]  No problem.
[00:09:15]  No problem.
[00:09:16]  Do you know about socket?
[00:09:20]  Pocket IO, anything.
[00:09:23]  Okay.
[00:09:29]  Okay, what is the difference between put API and patch API?
[00:09:33]  Yeah, put API and patch API both are same.
[00:09:38]  It is used to update when user sends the request.
[00:09:42]  Yeah, but there should be a difference.
[00:09:44]  Like why the developers created two different if they are both are same?
[00:09:50]  There should be difference, right?
[00:10:02]  Okay, no problem.
[00:10:04]  Let's talk about Node.js, okay, and JavaScript.
[00:10:09]  Sure.
[00:10:10]  You have heard the for loop, while loop.
[00:10:13]  Yeah, yeah, I have heard.
[00:10:15]  Okay, can you explain the difference between for loop and while loop?
[00:10:20]  Sure.
[00:10:22]  Don't explain me the syntax of for loop and while loop.
[00:10:28]  Just give me a scenario where I can use for loop and in which scenario I should use while loop.
[00:10:36]  Okay.
[00:10:37]  Yeah, sure.
[00:10:39]  Can I say the definition for both of them and start with it?
[00:10:42]  Yeah, go ahead.
[00:10:44]  Thank you.
[00:10:46]  First, I will start with the while loop.
[00:10:48]  In the while loop, the code runs until the condition is false.
[00:10:55]  It will run.
[00:11:00]  For the for loop, it is a iteration of numbers, triples or anything.
[00:11:08]  It will run in the for loop.
[00:11:12]  It is a known sequence.
[00:11:15]  For example, the for loop, we should implement for loop only when we know the range of numbers or sequence of list tuple.
[00:11:25]  For the while loop, we can use it when we don't know any sequence of numbers on range.
[00:11:33]  Okay, nice.
[00:11:36]  Okay.
[00:11:37]  And one view.
[00:11:43]  One second.
[00:11:45]  Okay.
[00:11:45]  Are you good in MongoDB or SQL?
[00:11:47]  Which language you like?
[00:11:48]  Which database?
[00:11:50]  SQL.
[00:11:51]  SQL.
[00:11:54]  Yes.
[00:11:57]  So this is my last question also.
[00:12:00]  Sure.
[00:12:02]  Okay.
[00:12:02]  So you need to find out, let's imagine a scenario.
[00:12:07]  Let's say you are in a school and you are a school owner and you are saving all student data in a database of SQL.
[00:12:15]  Okay.
[00:12:16]  Yes.
[00:12:17]  Student of class first let's say there are 40 student in class first you have you have saved all 40 data present absence in a database
[00:12:27]  and you want to check like how many total student are absent in a particular range from 1st january to 31st january okay write a query for that
[00:12:42]  just open any notepad or any anything and just write a query for that.
[00:12:50]  I will be opening.
[00:12:51]  Yeah, let me repeat my question also.
[00:12:54]  You need to find out list of students who are absent in a particular date range of 1st January to 31st January.
[00:13:06]  Okay.
[00:13:12]  Yeah.
[00:13:32]  Just simply write the query.
[00:13:34]  Oh, yeah, yeah.
[00:14:20]  Are you done?
[00:14:21]  No, no, no.
[00:14:22]  Give me a minute, please.
[00:14:23]  Okay, okay.
[00:14:45]  Hello?
[00:14:46]  Yeah, yeah, one second.
[00:14:54]  Okay.
[00:14:57]  We know we'll get back to you.
[00:14:58]  Okay.
[00:14:59]  So thank you, Vishal.
[00:15:01]  Yeah, thanks.
[00:15:02]  Thank you for the opportunity.
[00:15:03]  Yeah.
[00:15:05]  Welcome.
[00:15:09]  Hello.
[00:15:11]  Yeah.
[00:15:12]  Nobody knew you were going to leave.
[00:15:14]  You can leave.
[00:15:20]  Okay, I'll update to the results, okay?
[00:15:30]  Yeah, Richard, thank you.
[00:15:32]  Yeah, thanks.