Front end developer - Interview guide

Heres a list of javascript concepts that I encountered during my job interviews. This is more of a mid-level to senior front end developer questions. I'm not including definitions and examples you can find those from mdn docs and the resources that I have included at the end. Disclaimer - this is not a standardised interview guide even though the title says so. It's just the concepts that I kept encountered during the interviews. Surprisingly questions related to html/css were comparatively low so I haven't really included html/css related questions. Hope you will find this useful.

Javascript

1. Functional programming
2. Immutability
3. Function overriding/overloading
4. Function composition
5. Pure functions
6. Higher-order functions
7. Hoisting
8. Temporal dead zone
9. Closure
10. Memoization
11. Recursion
12. Currying
13. Debounce/Throttling
14. Even propagation/Event delegation
15. Event loop
16. Array methods
17. "this" in object
18. prototype inheritance
19. Promises
20. Async/Await
21. Modules
22. Oops and its 4 pillars with examples
23. Generators in js

React

1. React router
2. Hooks
3. HOC
4. Pure components
5. Error boundary
6. React portal
7. React memo
8. React suspense

API

Graphql

Testing

Jasmine/Jest

Web Performance

1. Lazy loading
2. Reducing DNS lookup
3. Critical rendering path
4. First contentful painting
5. Asset caching
6. Optimize animation(usage of will-change property)

Miscellaneous

1. What happens when you type a URL in the address bar
2. Explain HTTP
3. Serverside rendering
4. Build tools
5. Micro front-end/module federation
6. How npm install works internally
7. Docker
8. CI/CD Pipelines
9. DsAlgo
10. System design

Reference resources