Shrayansh Mani Tripathi

Yeah. Uh, so means myself, Shans, I'm from, and currently, I'm working in the Next Technology since 2.7 years. And, uh, here, I'm working as a PHP and, uh, like, React JS mostly on the developer side. And, uh, the project is, uh, I've done multiple projects in this company, and there has been, like, uh, means several projects. So first project was, uh, into full stack only, and the second one was, uh, whole into React JS. And the third one, uh, I'm working as a full stack itself. So I've got placed in this company, uh, from the CDAC. I've done postgraduate diploma in CDAC. Uh, so from there, I got placed. So explaining about my project, like, my project is all about a Fintech, uh, application. Uh, it is a debt collection app. So currently, uh, like, uh, there has been several parts in that. Means, uh, strategies and strategies, agent, and consumer. Uh, so for the consumer part and, uh, agent part, we are using the React JS and DSP and, uh, ASP dot NET. And so how it works like, uh, suppose, uh, consumer is there and, uh, he wants to upload some details and personal details, and it will be accessed by the agent. And, uh, if the agent, uh, means, uh, found out the details of the, uh, means, consumer, they will contact to the, uh, bank, and bank will coordinate with the 3rd party, uh, means, partners. And the 3rd party, uh, party partners will be, uh, means, again, coordinating with the agent, and agent will be assigning some details of the consumer. So it basically, uh, works as a bridging the gap between the consumer and, uh, consumer and the and the, uh, bank. So how it works like, uh, when, uh, when, uh, when some, uh, when some, like, uh, consumer is having debt. So by, uh, asking to the bank whatever the debt he's having, how much time it will be needed to be paid, So it works in that environment, and I have a I'm having a lot of I mean, so good knowledge on the React JS, Node JS, uh, 1 and PSP also. So this is forget about me.

How does Larvik, uh, Larvikue System is facilitate, uh, background processing, and, uh, what is AWS service? Would you complement it? So for this purpose, we are using, uh, basically, uh, like, Larval is, uh, I mean, is a referring to a queue system that facilitate, like, a background system that facilitate, uh, background processing such as AWS simple q sis SQS. SQS allows you to decouple and scale microservices, uh, distributed service, serverless application. To complement this, you could use AWS Lambda, which allows you to run the code without, provisioning, uh, and, uh, managing servers, making a deal for, uh, like, processing task from a queue asynchronously. And so, uh, suppose, uh, to complement SQS, uh, for the background processing, AWS Lambda is an excellent choice. Lambda allows you to means execute code in response to an event and, uh, uh, such as a message being added to queue. By connecting SQS with the Lambda, you can trigger function to process messages, uh, from the queue. Automatically, Lambda manages the execution environment scaling, read, uh, resource allocation. So you don't have to worry about, uh, server provisioning or management. This combination provides a powerful and scalable solution for the background, uh, processing in cloud based application.

How do you maintain a cohesive design system in React project using Tailwind? So maintaining, like, a cohesive design system in React using Tailwind CSS, uh, involve, like, several key compare, uh, componentization, breaking down your UI into a user a reusable component. Each component should have encapsulate, uh, a specific piece of functionality or a visual element, making it easier to maintain, uh, consistency across your project. Atomic CSS classes. Uh, Tailwind CSS uses atomic CSS classes to apply styles directly to the element like, define a set of utility, uh, classes in your design system, uh, for for the styles like typography, spacing, and colors. So this ensures, like, uh, consistency and allow for easy customization. So after that, configuration is there. So tailwind CSS allows you to customize that default theme, uh, to match your design system, branding, styling preference, define your color palette, typography, scale, spacing, utility in, uh, tailwind, and, uh, utility composition is also there. So in, uh, tailwind encourages, uh, composition utilities to create a custom style for your component instead of writing a custom CSS. And and documentation, uh, document your design system component pattern, usage guidelines. Uh, this helping developer understand how to use design system effectively promotes the, like, uh, consistency across the project. So versioning, uh, use, uh, versioning system to manage changes to your design system. And, uh, after that, testing is there. Implement visual restoration testing. We can do that to ensure that changes to your, uh, component and, uh, don't introduce, uh, unintended styling difference. Like, tools like Storybook can help. Like, you can create a visual library of your component and streamline the, uh, testing process.

What, uh, approach would you take to migrate legacy PHP code base to Laravel ensuring minimal downtime? So migration migration, uh, our legacy PHP code base to Laravel, uh, uh, while minimizing downtime has, like, many steps we can, uh, do planning, like, uh, assessment and planning. I means evaluate and evaluate the existing PHP code base to understand the architecture and dependency, first of all, and then identify the part of the code base that, uh, that can be migrated to Laravel, uh, incrementally. And then we can set up the Laravel environment, set up a new Laravel environment alongside the, uh, existing PHP application. And, uh, like, ensure both application can run simultaneously without conflict. Then in, uh, incremental, uh, migration, start by, uh, means my migrating a small independent modules or functionality from PSP code base to Laravel and refractor to, uh, migrate modules to any Laravel conventional and best practices. Then API layer comes in, uh, if feasible, considering, uh, creating an API level on the top, uh, of the existing PSP application to expose the functionality to the new Laravel application. Gradually replace the front end components of the PHP application, which ones that consume data from the Laravel API And database migration, migrate the database schema and, uh, data from the existing, uh, PHP application to label and ensure data consistency and, uh, integrity during the migration process. Implement the data migration script to handle schema manages, uh, schema changes and data transformation, and, uh, integration and testing, uh, like integrate the migrated modules with the existing PSP application to ensure, uh, the seamless functionality and gradual, uh, rollout. Once the migrated module have been, uh, thoroughly tested and validated, gradually roll out the changes or to the production. Monitor the, like, uh, application closely during the rollout phase, and then they identify the address, any issue or performance bottlenecks. Implement, uh, feature toggles. And, uh, after that's continuous improvement, iterate on the migration process based on the feedback and lesson learned. Uh, so continuously refine and optimize the label code based on group performance and mental ability.

How AWS service would you choose for hosting a Laravel application and why? So, uh, for this answer, uh, for hosting Laravel application, we use, like, Elastic Beanstalk. Why? Because easy deployment is there, and, uh, Elastic Beanstalk, uh, like, simplify it simplifies the deployment process, like, by providing a platform as a service environment that automatically handles deployment and the scaling, uh, the man scaling and management of your application. You can deploy Laravel application, uh, within just, like, a few clicks on that, and scalability is also one factor. Like, elastic means to, uh, elastic means automatically scales your application based on the traffic pattern, ensuring your Laravel application can handle varying levels. Uh, it can automatic automatically, uh, provision and scale a resource such as EC 2 stands and load balancer and database based on demand. And, like, uh, managed environment, uh, Elastic Beanstalk provides a managed environment for your Laravel application, including pre configured with the web servers and load balancer. Uh, integration and AWS service. Uh, Elastic Bean's, uh, stock integrates seamlessly with other AWS services such as, uh, Amazon RDS for database hosting, yeah, Amazon s 3 for storing static, and cost effective is also there. Elastic Media stock, uh, offers up to you, uh, go pricing model, allow you only to pay for the resource you use. So and this way.

What are the benefit of using, uh, Eloquent ORM in Laravel for database interaction over using raw scale queries. So, uh, uh, using, uh, eloquent ORM overlay means, uh, Laravel for the database interaction offered several, like, benefits, like simplicity and readability. Illocant provides a fluent expensive syntax for interacting with database, making it easier to write and understand database query. Uh, with, uh, eloquent, you can use, uh, initiative method and relationship to perform operation without writing complex SQL queries, and database abstraction is there. Eloquent abstract away the underlying database layer, allowing you to write database agnostic code. Like, this means you can switch between the different database without changing your application code, and, uh, MVC architecture is there. So, um, Eloquent integrates similarly with, uh, a Laravel MVC architecture, allowing you to define database model that represent your application data structure. Uh, automatic query building. Uh, Eloquent automatically generates SQL queries based on your method calls, reducing the need to write repetitive and SQL code. This, uh, simplifies, uh, query construction and help to prevent SQL injection, uh, vulnerabilities and relationship management. Uh, like, uh, Eloquent provides a built in support for defining and managing relationship between database and tables, such as 121, 12 many and many to many, and, uh, object oriented approach. La Quint, uh, models pro represent database record as a object, allowing you to interact with them and, uh, uh, use object oriented techniques. Uh, this makes layer code more expensive, reusable, and easier to man maintain and compare to procedure, uh, procedural SQL code. Query builder, uh, means, eloquent, uh, includes a query builder interface that allows you to construct a complex query using, uh, method saving.

In this MySQL query snippet used within PHP application, can you point out any aspect that might lead to efficient database performance or potential, uh, security vulnerabilities. So for this, So, like, uh, SQL injection variability, like, uh, the code is vulnerable to SQL injection because it directly intercolates the user input, uh, that get the email, uh, into the SQL query Without proper sanitization or parameterization, attackers could manipulate the email parameters to execute arbitrary SQL command leading to database breaches and database, uh, manipulation. Concatenation error. Uh, there is syntax error in SQL query, uh, due to improper concat, and the variable user email is not properly concatenated into the query. So it's like user e I mean, camel case should be there and this would reserve I mean, and wildcard selection. The query user select star to retrieve all columns, uh, from the user table while the convenient convenient, uh, selecting all columns can result to unnecessary data retrievals, uh, which can degrade the performance. It is better to specify only the required column in the select statement, and input validation is there. The the code does not perform any validation on email parameter often, like, from, um, uh, from the get. Uh, it it is essential to validate user input to ensure, uh, it meets expected criteria and database connection, like, uh, the, uh, means dollar connection variable is assumed to valid MySQL database connection and ensure that connection is properly established. So we, uh, we can, uh, revise the snippet code, like, user input, uh, validated or sanitized using filter input function, and, uh, parameterized query is used to prevent SQL vulnerabilities, and the only necessary columns, uh, can be selected. Error handling is included can be included.

So for this question, What could be the issue with this React class component snippet that is meant to update the user profile data once save button is pressed. Note any anti patterns and explain how it could be improved for a better estate management. So for this purpose, So the fuse whose, like, anti patterns are provided in the React class components, like, uh, state, uh, initial initialization. The state object is empty in the constructor, and the user object is assigned, uh, directly from the props. While this may work, uh, it is generally not recommended to directly mutate the props in the state. It can lead to, like, uh, unexpected behavior and make your component harder to, uh, reason about, like, in a instead initialize the state with the props directly. Uh, so unused state. The user object in the state is not being used, uh, anywhere in the component. Like, it seems like intention is to use it for updating user data, but it has not been utilized in the handle safe. And, uh, so means, um, missing input field. There is no input fields or form elements provided in the render method to allow user to update their profile data without input field. User won't be able to interact with the component to update the information, and limited state management is there. The component state is not being updated anywhere, like, which means, uh, there will, uh, there there is no way to reflect changes made by the user in the UI. Uh, updating the state with the user input is crucial for keeping UI sync. So we can, uh, we can do this by, uh, when, sir, we can, uh, create a a constructor. Uh, constructed props is how it is there. But in the handle input chain, we can create and that, uh, name and value as a props we can pass. And on the target, uh, of the previous state, we can change it and then handle save function we can do. And, uh, we can, uh, you, uh, alert means, uh, the same way it has been done here, handle save. We can do that, and, uh, then we can use the unused state also in the return, uh, function, like, uh, input will be there and username will be there. And on change of, uh, in, uh, means input change, uh, input, uh, whatever will be there on change, but then we can click on the handles here. So we can do in that way.

How do you apply the solid principal in full stack Laravel, uh, React application to ensure high quality code? So applying, like, uh, single responsibility, uh, single responsibility principle like a Laravel backend, uh, is there, then each class or component should have only one reason to change. In the Laravel, uh, this means, like, separating concerns such as routing, controller, service, and models. And for the front end part, similarly, like, React components should focus on rendering UI handling user interaction logic related to data phasing, state management, and side effects should be separated into hooks. And, uh, so and open closed, uh, principle is there. So OCT, classes, method, or components should have, uh, should be open for execution but closed for modification. In label, you can achieve this by using interface, abstract classes, and dependency injection to allow for extensions through inheritance or composition without modifying existing code. And React front end, uh, we can do, like, uh, means components should be designed in a way that allow them to extend it or reuse without modification. This can involve using prop for configuration and composition and higher high order function or higher order components. And, uh, like, uh, list code substitution principle, substitution principle we can use, like, uh, level back end subtypes should be substantial for their base types without altering the correctness of the program. This means, like, the, uh, that derived class should add that to the contact defined on the base classes. In Laravel, this involves ensuring, uh, the subclass can be used for interchangeably, uh, with their parent class. And dependency, uh, inversion is for level, uh, back end. Uh, high level module should not depend on the low, uh, means low level modules. Uh, both should be dependent on abstraction. Abstraction should not depend on the details. Details should be dependent on the abstraction. In level, this can be achieved through the dependency injection where dependency are passed into the classes rather than created within it. And for the front end component, uh, should be dependent on the abstraction, uh, such as the props and context rather, uh, than concrete implementation. This allowed component to be easily testable and interchangeable.

Can you demonstrate how to utilize Docker for creating isolated environment for PSP unit testing with PSP unit? Uh, so, like, as your, like, uh, Dockerfile, we can create, uh, for, uh, so create a Dockerfile, uh, and the root repo root directory to define Docker image, like, uh, an unofficial PHP image as a base. Use, uh, and no. Use an official PSP image as a base and install composer for managing PSP dependencies, and then set the work directory inside the container. Copy the project files into the container, and then install the project dependency using composer, and copy the PHP unit configuration file. Set the entry point, uh, to the PHP unit, then, uh, PHP unit XML. Create a PHP unit configuration file in your project route. Build a docker image, uh, means using the command like docker build, uh, dash t PHP unit. Then we can run the test, like, uh, run PHP test inside Docker container. Docker run, uh, minus minus r n and PHP unit. And, uh, this command, like, mount your project directly to the app inside the container and run p s p unit test. Like, uh, the dash dash RM flag ensure that the container is removed after the execution.

Would you how would you leverage AWS service to scale our web application architecture for increasing loads? So so, uh, to scale the Laravel application, uh, architecture on AWS for increasing the loads, you can, like, ensure high availability and scalability performance. Like, how can we do that? Uh, Amazon EC 2 is there. So use, uh, Elastic Compute Comp, uh, Cloud, uh, to host your liable application, deploy multiple EC 2 stands across different availability zones to distribute the load and improve the fault tolerance. You can configure auto scaling groups to automatically adjust the, uh, number of easy two instance based on the demand. And Amazon RDS is also there. So utilize, uh, relational database, uh, of Amazon to host, uh, your MySQL or, post grade SQL database. RDS provide automated backups and scaling high availability features allowing you to focus on application development without many managing database infrastructure. So after that, Amazon, uh, Elastic Cache, uh, implementing, uh, Amazon Elastic Cache to cache the frequently accessed data and by reducing the load on our database and improving the application performance. And after that, Amazon Elastic loaded load balancer is there. So set up a load balancer or network load balancer to distribute incoming traffic across, like, multiple EC two instances. ELB, uh, automatic, uh, scales and route traffic to healthy instance, and, uh, Amazon CloudFront is there, uh, like, utilize CloudFront. AWS content delivery, uh, network is there to cache, uh, and deliver static asset and dynamic content closer to your user. And AWS Lambda, uh, consider using AWS Lambda for service serverless computing to offload the compute intensive task or a background processing for your EC two instance. Lambda allows you to execute code without provisioning and or managing server, providing a stability and cost effective. By leveraging these AWS services, you can build a scalable and, uh, reliable architecture of your Laravel application.