How do you implement optimistic updates in NgRx?

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NgRx Interview Questions

  1. [JUNIOR] What is NgRx and why is it used in Angular applications?
  2. [JUNIOR] What are the core building blocks of NgRx?
  3. [JUNIOR] What is the NgRx Store and what role does it play in state management?
  4. [JUNIOR] What are actions in NgRx and how are they used?
  5. [JUNIOR] What are reducers in NgRx and what do they do?
  6. [MID] Why would you use NgRx instead of Angular services or RxJS Subjects for state management?
  7. [MID] How do you handle side effects such as HTTP requests using NgRx Effects?
  8. [SENIOR] What is the difference between switchMap, mergeMap, concatMap, and exhaustMap when used in NgRx effects?
  9. [JUNIOR] What is a selector in NgRx?
  10. [JUNIOR] What are effects in NgRx?
  11. [JUNIOR] What are some key benefits of using NgRx for state management?
  12. [MID] What is the difference between @ngrx/store, @ngrx/effects, and @ngrx/entity?
  13. [MID] How do you use createAction and action creators in NgRx?
  14. [MID] How does memoization work in NgRx selectors created with createSelector?
  15. [MID] How can you debug your NgRx store using Redux DevTools?
  16. [SENIOR] What is the difference between NgRx Store and NgRx ComponentStore?
  17. [SENIOR] How would you optimize performance in a large NgRx application?
  18. [JUNIOR] What is the Redux pattern and how does NgRx implement it?
  19. [MID] What is the purpose of entity adapters in @ngrx/entity?
  20. [MID] What is the createReducer function and how does it work in NgRx?
  21. [MID] What is the createEffect function and how do you define effects with it?
  22. [MID] How do you implement lazy loading of feature state with NgRx StoreModule.forFeature?
  23. [MID] How does NgRx ensure immutability of the store state?
  24. [SENIOR] What are meta-reducers in NgRx and what are common use cases for them?
  25. [SENIOR] How do you implement optimistic updates in NgRx?
  26. [SENIOR] What are some common mistakes developers make when working with NgRx?
  27. [SENIOR] How do you test NgRx effects that make HTTP requests?
  28. [EXPERT] How does the NgRx Signal Store differ from the classic NgRx Store and when would you choose one over the other?
  29. [JUNIOR] How does an action differ from a reducer in NgRx?
  30. [JUNIOR] What is the unidirectional data flow in NgRx?
  31. [MID] What are the different parts of a state tree in NgRx?
  32. [MID] What is the role of StoreModule.forRoot and StoreModule.forFeature in an NgRx application?
  33. [MID] What are some real-world use cases where NgRx is a good fit?
  34. [SENIOR] How do you compose selectors for complex derived state in NgRx?
  35. [SENIOR] What is the best way to update deeply nested objects in NgRx state?
  36. [SENIOR] In NgRx, why would you use entities over plain arrays in your state?
  37. [SENIOR] How do you test NgRx reducers?
  38. [SENIOR] What is the facade pattern in NgRx and when should you use it?
  39. [EXPERT] What are the trade-offs of using NgRx versus lightweight state management approaches in Angular?
  40. [MID] What is the difference between props and payload in NgRx actions?
  41. [SENIOR] What is the S.H.A.R.I principle for deciding when to use NgRx Store?
  42. [SENIOR] How do you handle router state with @ngrx/router-store?
  43. [EXPERT] How would you architect a large-scale Angular application's state using feature stores and shared state?
  44. [EXPERT] How do you handle race conditions and cancellation in NgRx effects?
  45. [EXPERT] How do you manage complex form state with NgRx?
  46. [SENIOR] How do you test NgRx selectors?
  47. [EXPERT] How does NgRx integrate with Angular's change detection strategy and zone.js?
  48. [EXPERT] What is the createFeature function and how does it reduce boilerplate in NgRx?
  49. [EXPERT] What strategies do you use to normalize state in an NgRx store?
  50. [EXPERT] How would you write a custom meta-reducer to log all dispatched actions in an NgRx application?