Deepak

So, I am Deepak Dehradisai. I am a resident of Faridabad. It's in Delhi, NCR. So, I have around three years of work experience working as a full stack developer, more of a backend heavy developer. I have been working in various stacks such as Node.js, React.js, Vue.js, Nest.js, Next.js and other JavaScript-based frameworks. So, yeah, I have worked with different clients and I have also worked on multiple projects. And my current company is Innova Solutions, which is located at Noida. And I have been working as a full stack developer here. So, in this project that I am working on is like a user management system, not a user management system, more of a hiring system. So, it is kind of an onboarding portal, also mentioned in my resume. So, in this onboarding portal, this has been like a connection with different users. So, it is for internal use only. I think they use it for internal purposes. So, since this is a staffing company, more of a staffing company, so they use it for internal purposes. And before this, I have been working with SuperDNA Technologies. In there, I was working on a project management tool, kind of a workflow tool. So, for that, I developed the whole backend and the frontend system for that project. And it was for the artists to upload and go through their whole workflow for uploading the files and managing the files. And before that, I have been working with Codalion Technologies as well. In that company, I worked as a full stack developer also. I worked on backend Node.js and React.js and Vue.js projects, multiple projects that I have been working on. So, I have around three years of experience working as a full stack developer in Vue.js, React.js, and Node.js and other JavaScript-based frameworks. And I have also directly managed client end. Yeah, I have been working for three long years like this. And thank you.

So, yeah, I can integrate rate limiting in Node.js application using Express.js. I can use a middleware first for limiting the rate of request and that these requests can be handled into the middleware before going to the API call. So yeah, I can use that rate limiting in Node.js and so for implementing this, I need to calculate the request in a particular time frame. So if there is a particular request coming from a source or somewhere, in that particular time frame, that is more than the limit. So I can like throw an exception or like I can just handle it into the middleware so that not more than three, four requests can come in there. So yeah, I can do this for rate limiting and limiting the traffic and the number of requests made to specific resources made at the backend level. So yeah, I can do this.

Okay, so to manage a socket.io based messaging service in NodeJS to handle a sudden spike in users. Okay, so since socket.io is for like a real-time communication, a real-time socket to communicate between the, between users and between multiple users at the real-time. So there could be multiple users using the server on the NodeJS. First thing I can do is, I think load balancing would handle most of it, but if talking specifically about socket.io, I can, I think from the server side, I can create a cube kind of something. So for this, create a, creating a socket.io, I can, I think to handle a sudden spike of users, I don't know if it is able to hear me or not, I think, yeah, to handle a sudden spike of users in NodeJS on a socket.io based messaging service. I think load balancing would work at the server end to handle this kind of a problem and scaling the server horizontally would also work. Also I can use a queue system. I think horizontal scaling would be the best or auto-scaling would be the best. And yeah, message queue, these three things I think would work. Also rate limiting could be a thing for implementing, like handling sudden spike. So I think this would be it.

So, to handle, to ensure secure and structured error handling in Express.js application, I think I can use, first thing to use is a try-catch, okay, in Node.js, try-catch is the first thing to use at the low level, but at the higher level, I think in the middle layers, I can also handle the error, so in the middle layer, creating like a centralized error handling system, so for the middle layer, in all the applications, in all the requests that are coming, I can do a centralized error handling using middle layers, so I think that would be a thing and yeah, that centralized error handling system should have the ability to handle multiple types of error and secure and structured error handling. I think middle layer would do, middle layer, declaring a middle layer with an error handling purpose would do, just for fun.

In which cases, okay, in which cases you prefer to use type ORM or other ORMs and why, okay. So I think these ORM have a specific edge over the normal Express.js structure to define a database and to use and handle a database. I think ORM have a specific edge over that because using ORM would mean that you are using it in a more secure and a compact way. Like if I have to use, I will typically use, there are different types of ORM I have used and I would typically use a Prisma one because Prisma one would like create one file, one schema file for all the databases and the operations to be defined there. That is .prisma file or that is schema.prisma file and that type ORM would define it at one place. So I feel like I have used multiple but I like Prisma more because of this fact that there is a specific schema and that looks better in a way because it has some input definition that to give input or to create or to validate like this is there is a specific definition for that and that makes it easy. So like type ORM, I would say that for TypeScript, it would be better to use type ORM. So like I think in the type ORM, I haven't used much of it, but yeah, it has a feature I think called eager loading. I have used it once and I think there is a feature called lazy loading or eager loading and also there is a facility of having like creating migrations and all. So this like type ORM, I think is better for TypeScript as a conclusion, I would conclude that your type ORM is better for TypeScript. So yeah, I think yeah, Prisma and type ORM both are better and type ORM is better for TypeScript because it makes it clear and more declarative and more optimized to read and like to work on. So yeah.

So, what consideration must be taken into the account when implementing pagination of records from a MySQL database into a Node.js application, okay, so when implementing pagination of records from a MySQL database into a Node.js application, I think there are basic things which need to be considered for pagination like offset and there are basic values like offset and page number and like the number of records you want to fetch, but how you fetch it, that matters, so pagination strategy would basically depend on offset part of it, so yeah, if I fetch a like particular number of records from a table, I need to declare a limit for that, for that page like if there is a limit for that page to be fetched and also I have to like declare an offset as well I think for that, so offset would, what it would do is like it would skip the particular part of the records and then fetch the other part of the record and there should be a limit for that, so I think that would be the only strategy, which is strategy to fetch the records for a pagination and to ensure like optimization, what I can do is I can use indexes for that in MySQL and the query I think should be optimized to a level for fetching the data consistently, so yeah, I think the query should not take much time to load data from the table from MySQL, so for that I think I should have, I think indexes are important for that, so for like declaring indexes would help SQL to fetch data from a like particular offset after a particular number of records to fetch data, it would help, indexes would help I think, so yeah, I think these are the things that needs to be considered for implementing pagination.

ok so in this javascript code i have a socket.io implemented in here and when client ok when connection is there client ok since there are two events like handling being handled since event would work on connection disconnection and everything so this would cause an issue for like handle event the part where client.on event is there it would be triggered every time when there is an event in socket.io also this variable i think socket3000 ok so i have this is ok ok clean up is there on disconnect that is that should be there client.removeallistener should be there and on event i think that event is kind of no no event is a particular event ok ok i think only i feel there is only one thing that can be optimized that is event and that is all every time that event occurs and yeah i think there is not much into it only the event thing that needs to be handled properly and everything else looks fine in there and clean up on disconnect should be there it is already commented there should be a clean up on disconnect and this event should not be redundant redundantly called again and again and there should be kind of debouncing or something for handling this event i think this is the only thing i feel

So, the best approach to manage and apply configuration changes across multiple environments in a Node.js application, I think that could be using the multiple environments, right? So that should be using a .sh or a bash script. I think that should be there for managing multiple environments in a Node.js application and also an env file is there, that is the environment variable. And that .env file should do work, but for having it in different environments and to manage the files. And for deployment purposes, I think the .sh file and .env file, this should work. And also a config file could be created, a JSON file, like a JSON format, one config file, one config file, that may take up the appropriate link or appropriate environment based on the environment. So that may take up the appropriate variables from env files based on the environment. So yeah, I think these things can be used. So there could be a particular store for, if we are using any deployment or an infrastructure service like AWS or something, so I think we can use a particular store or something like that for handling these variables, environment variables easily. So yeah, these things, Docker Kubernetes are other things that can also be used for multiple environments and like using multiple databases and all at different places, at different environments. And these are something which are high level. I haven't used Docker, but not much, but yeah, .env files, Node config files for managing environments and for managing the environment based resources, we can use Docker or Kubernetes to containerize things and resources that are to be used. So yeah, I think we can use config files and .env files and all that stores for managing these variables.

so approach I would take to migrate complex database schema without down time using type for remote node js type ok complex database schema ok I think the only way I feel is to use multiple versions of my application yeah I think this multiple versions of my application would do this work since to like the without any down time I can only do this I can deploy a particular version of my application and I can then migrate and migrate my data and database schema into the other version and I can then deploy the second version as well and use the second version and I can then degrade that first version back so I think this would do the work and yeah I just need to be tested before like deploying I think and I don't have much high level understanding about this but yeah I can only understand it using multiple version of my application I think this can be done yeah

How would you apply TypeScript decorators in a Node.js project to enhance modularity and readability of code? Yeah, for TypeScript decorators in Node.js, TypeScript looks well in Node.js and defining types for a particular argument or a particular variable and definitions for particular functions help the user to understand things easily. So I think there could be like, I think I can use practices like creating a, like in Next.js what I want to tell you is Next.js there are decorators and that decorators are like, are very helpful to declare something or to like define the class or data models or anything. So TypeScript as well like using Next.js decorators and defining decorators, I can like, by using them I can like enhance my code. So there are various decorators as well in Next.js like injectable and for data models there are checks like for empty and all. So yeah, I think these things can be used or also like there are class decorators and all and there are multiple decorators like method decorators and all. So how would I apply TypeScript decorator? I have mostly used the decorators which are already created by or there in the TypeScript. So I would apply them based on like my requirement if I am going to create a data schema. So if I am going to name my attribute or like name, consider it name or ID. So based on like ID should be unique and ID should be something which should be incremented or which should be a UUID type of a thing. So that should be unique in the database and unique to our table and name should be like there should be, it should be there, name should be there and like there should be a particular string length and something like that. So decorators can be useful there to define data and to define methods and to define all these things. And yeah, these things make code readable and all.

So, to manage asynchronous processing in Node.js, when integrating with multiple third-party APIs, I have integrated multiple third-party APIs, and to manage asynchronous processing, I think I can use something like Q or something to manage asynchronous processing in Node.js. So, like, directly asynchronous programming in Node.js is handled, like, very well, but a Q would be more, and threads would be more, like, a cherry over, like, a cake. So, yeah, that threads and these things of Node.js, these help us to, like, maintain a Q. Like, if there's a webhook or something, some request coming up, so there should be, like, a waiting period or a waiting time, or there should be, like, callbacks or promises that one is waiting an application and a thread is waiting for a single webhook to be completed, and then the next thing is to be completed. And simultaneously, the other tasks are happening there. So, that should not be blocked, as well. So, promises, try-catch, asynchrovate, and callbacks, these all things can be used for handling. Also, I can implement a Q over hooks and all that coming up from the third-party APIs. And, yeah, this feature of Node.js, like, helps us to, like, implement a synchronous and a continuous programming. Also, I think I can also use throttling if there are multiple requests coming up, and, yeah, from, like, to handle webhooks and all. And, yeah, I also told you Q-based processing. So, Q would be beneficial in that. So, yeah, I can use these things to implement asynchronous operations over the API for, like, for integrating third-party APIs.