How to wrap up any of your interivews?

Must ask following in the mentioned order

• Is there anything that you see as a potential dealbreaker? Feel free to explicitly mention that as I have the floor to clarify that now.
• What are you impressions about our discussion over the past X minutes?
• I kindly ask you to provide as comprehensive feedback as possible, as it will be my main takeaway that will help me self reflect and become a betterself.

Questions to ask from the interviewer (HM/EM/TL)

• Opening Question:
  • Can you provide me with an overview of the team's dynamics and the company's goals?
• Understanding the Team:
  • Can you describe the composition of the team in terms of size, expertise levels, and diversity?
  • What does the team roadmap look like, and what projects are currently in progress or planned for the near future?
• Tech Stack and Collaboration:
  • How does the team collaborate with other departments and teams within the company?
  • How does the internal rotation of engineers across teams look like?
  • Could you highlight the various touch points I would have as a developer within the team, including technologies and different aspects of development?
• Role and Day-to-Day:
  • Could you walk me through a typical day as a Senior Software Engineer on the team?
  • How does the team encourage and foster innovation among its members?
• Backend and Technical Aspects:
  • Can you provide insights into the backend infrastructure at Tier, such as scale and the specific services this team is responsible for?
  • What is the pace of development like within the company and specifically within the team?
  • How does the team maintain a healthy work-life balance, and what measures are in place to prevent burnout?
  • What opportunities for career growth are available within both the company and the team?
• Expectations and Contributions:
  • Based on our discussions and my evaluation so far, what do you see as my potential contributions to the team?
  • If I'm not able to meet all expectations initially, how would that be addressed and supported?
• Engineering Practices and Growth:
  • Can you share notable engineering practices or initiatives that stand out within both the company and the team?
  • How does this backend developer role at Tier differ from a backend position at a more traditional web app-based company, like Taxfix?
• Long-Term Growth:
  • Looking ahead to a year from now, what type of career growth should I expect to have achieved while working with this team?
• Feedback on Discussion:
  • Could you share your impressions of our conversation? Did I come across as overthinking or confused?
• Additional Questions:
  • What are the key challenges the team is currently facing, and how do you envision addressing them?
  • Can you provide examples of successful cross-team collaborations and the impact they had?
  • How does the team handle onboarding and knowledge transfer for new members?

Algorithms

• array of string mn c anagram find krny hain
• multiplication of two numbers
• nested array ko flat krna h
• https://edabit.com/challenge/TzxoYExuxuQw2ahWR

Data Structures

• Searching algos?
• Which data structure to use when?
• Limitation of trees?
• Types of data structures?
• Which to use when?
• How to save inches or centi meters in database in efficient data structure?

Dev Ops

• Mapping in logstash and kibana?
• Limitation of lambda function?

VCS (GitLab/GitHub)

• What are Hooks?
• What are Web, Client side, Server side hooks?
• What is PR/MR?
• What is mono repo arhitecture?
• What are actions in GitHub? What is the equivalent of GitHub actions in GitLab?

Databases

• What is a foreign key?
• What are Compound indexes?
• What are joins in databases?
• Databases, you will prefer sql vs nosql or vice versa in what scenario?
• Why nosql databases are faster than sql? (due to ACID)

MongoDB

• References ko kaisy manage krty hain MongoDb mn?
• Indexing in MongoDb?
• Namespace in mongodb?
• Hooks in mongodb? (M O N G O O S E)
• What is sharding?
• Can we join two collections in MongoDB?

Node.js

• What is Node.js? (must explain event loop)
• Streams vs Read in node.js?
• Http vs Https module?
• What are Middlewares?
• Pipes in node.js?
• Why Query params are more suited in Express.js?
• What are streams in node.js?

GraphQL

• What is an introspective query?
• GQL Connection vs GQL List? (Relay GraphQL)
• How GraphQL API is different from typical REST API?

React

• How do you check types in react? (type validation in react) [prop types and default types or you can use typescript as well]
• How will you pass a prop from parent to 5th child directly? [you can use redux store or context API]
• Class vs Functional components? Diff?
  • class : functional
  • lifecycle methods [polymorphism based]: hooks [polymorphism based]
• When useEffect/or any hook is used?
• If useEffect is equivalent to componentDidMount then isn’t it a life cycle method then?
• Can you map life cycle methods on to react hooks? Like which hook is equivalent to componentDidMount?
• What is reconciliation?
• How to pass data from parent to child component and child to parent component?
• What is prop drilling?
• How can one achieve shouldComponentUpdate like behaviour in react functional component?
• How do you ensure typsafety while working with react.JS? (not react.TS)
• Did you used Relay with GraphQL? (GQL client for React) (https://relay.dev/)
• What are keys used for? (Key in React.)
• Can we use array index as a Key in React?
• What is composition in React? (Methodology referred to as Composition) (https://reactjs.org/docs/composition-vs-inheritance.html)
• What's the difference between Component and PureComponent in React?

Angular

• How to sequentially trigger HTTP requests in Angular?
• What are interceptors?
• What is data-binding? One way data binding? Two way data binding?
• What is DI (Dependency Injection) in angular?

TypeScript

• At what point types are checked in typescript? [at design time]
• What are utility types? When are they used?
• What are generics? How are they useful?

HTML

• What is preventDefault?
• What is event bubbling?
• What is event delegation?

JavaScript

• ES5 vs ES6 major differences?
• Map k andr c conditional return kia jaye to kya wo filter ki trha act ni kry ga?
• How this is different in ES5 and ES6?
• Convert ES6 code to ES5.
• TypeScript mn utility types kya hain?
• What is the benefit of using promises? (converting asynchronous code to synchronous)
• Polymorphism in JavaScript? Method overloading vs Method overriding? (how to do in JS)
• OOP in javascript?
• OOP based vs Functional Programming? Which to use when and what type of system?
• strict vs non strict mode
• Map q aya tha?
• Set q aya tha?
• for in vs for of, difference and pro cons?
• symbol in JS?
• promises long chaining scenarios?
• How hoisting works?
• What is closure?
• Abstraction in JS?
• OOP in JS how?
• How to specify access levels for variables in JS?
• How many level of overriding can be done?
• Why or when promises are used?
• When to use promise.all?
• How to run promises inside promise.all sequentially?
• Deep copy vs Shallow copy?
• Does array destructuring do shallow copy or deep copy?
• How is optional chaining different from ternary operator?
• Is the execution of Array.map async?
• How execution of Array.map is different from traditional for/for-in/for-of loop?
• How is prototypal inheritance different from Class based inheritance?
• What is callback hell? How can we avoid that?
• How can we run promises sequentially? (promise chaining)
• What are primitve data types in JS?
• What are different scopes in JavaScript (for eg Global), what are the other ones? (https://dmitripavlutin.com/javascript-scope/)
• What is hoisting?
• Difference between var, let and const.
• What is Promise?
• Difference between double and triple equals? (== vs ===)

AWS

• what is the memory limit of AWS Lambda?
• In which cases you’ll avoid using AWS Lambda?

Team Lead

• How do you define your deadlines?
• Team mates c kaam kaisy niklwaty o?
• If you are not meeting the deadline, how do you respond to that?
• Is buffering while defining deadlines good or not?

General / Scenario Based

• Hashing vs Encryption?
• What is HashMap?
• What is indexing?
• What is REST api?
• Authorization vs Authentication, please explain them?
• How a typical HTTP request works?
• What is GitHub? How does it differ from Google Docs or dropbox?
• OAuth vs OpenID, please explain the difference?
• OAuth vs JWT, please explain the difference?
• How is socket connection established and maintained?
• What's the difference between "image" and "container" in docker world?
• How to communicate between docker containers?
• What are middlewares?
• If I have have marks of student in database, and I have to return student's "average" score alongwith subject marks. How will I implement this? or Where will this aggregation (Averaging) of marks should take place?
• When RDBMS is good and when NOSQL?
• Whats the project in your previous experience that you are most proud of?
• What is null safety?
• Local storage vs Session storage vs Cookies?
• What are the different ways to pass JWT token to server?
• HTTP PUT vs POST vs PATCH?
• What is 1+N problem?
• What is double spending? How to avoid it?
• When you shipped a feature with minimal or ideally no bugs?
• When you shipped a feature and some bugs popped up, how do you recover from that situation?
• What is double spending?
• Polling vs Subscription
• RabbitMQ
  • What is the concept of exchanges?
  • What is a queue?
• Bridge vs Host in Docker Network
• Docker container hardware resources, how it takes
• Doceker vs VM?
• Is Docker container a process or another VM?
• Why Sql DBs are not horizontally scalable? And why NoSQL DBs are easily horizontally scalable?
• Sharding vs Replicas?
• Transactions
• Service as a Model
• How to resole circular dependency? Inject first decorator in Nest.js
• CDC b/w differente instances
• Monorepo vs Microrepo, what to use when?
• Where do we write the business logic in backend system?

Designing / Architecture

• What are design patterns? Do you follow any of them?
• What are anti patterns? how to avoid them?
• MongoDb mn nested documents kb bnaty hain?
• Kis trha ki application mn Node.js use krni a aur MongoDb kis trha ki app mn?
• React is best for which type of apps and Angular for which type of apps?
• Unrelated components mn data sharing k kya kya possible ways hain?
• What are data structures?
• How you make choice which data structure to use when?
• Linear, Non-Linear data structures? When to use which?
• What is scalable architecture?
• What are scalable applications?
• What is micro-services architecture?
• How do micro-services communicate in between?
• How will you notify one micro-service from other micro-service on completion of some task?
• How will you implement authentication in a micro-services mesh?
• How do you maintain user sessions?
• How do you implement role based and user based authentication?
• How would you implement "Sign out from all devices" feature?
• How would you implelent "Remember me" feature?
• "Session" vs "Token" startegies, what's the difference? ("Sessions" vs "JWT Token", how do they differ?)
• How will you perform "server side request validation" for request body, query params or url params?
• How the architecture of Background job is different from web apps?
• How to handle duplicate credit card transaction in Stripe API?
• Where Database Transactions are used what are its benefits?
• How do you make sure your services are up and running?
• How will you improve the performance of an endpoint?
• How you can ensure observability in a system?
• How do you evaluate the performance of web application?
• Observability vs Monitoring?
• How does an ideal development workflow looks like?
• How will you evaluate whether your delivered feature was successfull or not? (both on infra level, customer level)
• How would you ensure the reliability of a service you have been working on?
• Tell me about an incident that you faced while bein on call, and how you resolved that?

Personal / Behavioural (follow STAR method)

• Tell me something about yourself that is not mentioned in your cv/resume?
• What do you wanna do?
• What’s the next big thing you wanna do?
• Why did you join your current company?
• Why do you wanna leave the company?
• What is your greatest stregth?
• Tell me a situation in which you couldn't meet the deadline or had a failure, how did you communicated it?
• When you faced a conflict/disagreement and how you resolved it?
• When you disagreed with your supervisor or team mate, what did you do?
• When you worked on something critical?
• When you did surprisingly well and what was the reason of your good performance?
• When you were unable to meet the goals?
• When you faced a technical challenge and how you resolve it?
• How do you learn any new thing?

Materials

---

• Method overriding in javascript: https://coderwall.com/p/bdadoa/javascript-function-overloading
• Prototypal inheritance / Polymorphism in es6
  • https://javascript.info/prototype-inheritance
  • https://stackoverflow.com/questions/44391149/es6-classes-ability-to-perform-polymorphism
• es5 vs es6: https://www.javatpoint.com/es5-vs-es6
• Data structures:
  • Types: https://www.freecodecamp.org/news/the-top-data-structures-you-should-know-for-your-next-coding-interview-36af0831f5e3/
  • Graph: https://www.youtube.com/watch?v=cWNEl4HE2OE
  • Linear vs Non Linear: https://pediaa.com/what-is-the-difference-between-linear-and-non-linear-data-structures/
  • Main characteristics: https://searchsqlserver.techtarget.com/definition/data-structure
  • Types of data structures?
  • When to use which data structure?
  • Referencing in mongodb: https://docs.mongodb.com/manual/reference/database-references/
• OOP vs Functional programming: https://www.educba.com/functional-programming-vs-oop/

• How to implement Lifecycle methods in useEffect?
• Default props in react with TypeScript?
• Rebase in gitLab?
• Cherry pick in gitLab?
• Define type for function with parameters and some return type in TypeScript?
• Why useMemo is used jn react?
• What if some promise is rejected in Promise.all?
• Nested contexts in React context API are allowed?
• Context1 =》Context2 =》 componentNested, are values of Context1 accessible in componentNested?

• How to check if two rectangles are overlapping or not?
• How to identify if there is a circle in between linkedlist node?