How do you watch for nested data changes in Vue.js?

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Vue.js Interview Questions

  1. [JUNIOR] What is Vue.js and what are its key features?
  2. [JUNIOR] What are components in Vue.js and how do you create them?
  3. [JUNIOR] What are the Vue instance lifecycle hooks and when does each one fire?
  4. [JUNIOR] What is the difference between v-if and v-show directives?
  5. [MID] What is the Composition API in Vue 3 and how does it differ from the Options API?
  6. [MID] What is the difference between ref and reactive in Vue 3?
  7. [JUNIOR] What is data binding in Vue.js and what types of data binding does it support?
  8. [JUNIOR] What are props in Vue.js and how do you pass data from parent to child components?
  9. [JUNIOR] How does the v-model directive work for two-way data binding?
  10. [JUNIOR] What is the v-for directive and how do you use it to render lists?
  11. [MID] What are watchers in Vue.js and when should you use them instead of computed properties?
  12. [MID] How does Vue.js reactivity system work under the hood?
  13. [MID] What is Vue Router and how do you implement dynamic route matching?
  14. [SENIOR] How would you architect a large-scale Vue.js application for maintainability and scalability?
  15. [JUNIOR] What are computed properties in Vue.js and how do they differ from methods?
  16. [JUNIOR] What are Vue.js directives and what are the most commonly used built-in directives?
  17. [JUNIOR] What is the significance of the key attribute when using v-for?
  18. [JUNIOR] What is a Single-File Component (SFC) in Vue.js?
  19. [MID] What are scoped slots and how do they differ from regular slots?
  20. [MID] What is Pinia and why is it recommended over Vuex for Vue 3 applications?
  21. [MID] How do you use the provide and inject API for dependency injection across components?
  22. [MID] What is the purpose of nextTick in Vue.js and when would you use it?
  23. [SENIOR] How does Vue 3's reactivity system use Proxy compared to Vue 2's Object.defineProperty and what are the implications?
  24. [SENIOR] How would you optimize the performance of a large Vue.js application?
  25. [SENIOR] What is server-side rendering (SSR) with Nuxt.js and when should you use it over a standard SPA?
  26. [JUNIOR] What is the Vue CLI and what features does it provide?
  27. [JUNIOR] How do you handle user events in Vue.js templates?
  28. [JUNIOR] What are event modifiers in Vue.js and what are some examples?
  29. [MID] What are navigation guards in Vue Router and how do you implement them?
  30. [MID] How do you handle asynchronous components and lazy loading in Vue.js?
  31. [MID] What are custom directives in Vue.js and how do you create one?
  32. [MID] What are mixins in Vue.js and what problems do they introduce?
  33. [MID] How do you watch for nested data changes in Vue.js?
  34. [SENIOR] How do you implement code splitting and lazy loading to reduce bundle size in Vue.js?
  35. [SENIOR] How would you design a plugin system for a Vue.js application?
  36. [SENIOR] How do you handle authentication and authorization flows in a Vue.js single-page application?
  37. [JUNIOR] What is a Vue instance and how do you create one?
  38. [JUNIOR] What is the difference between one-way data flow and two-way data binding in Vue.js?
  39. [JUNIOR] What are slots in Vue.js and how do you use them?
  40. [MID] What is scoped CSS in Vue.js and how does style encapsulation work?
  41. [MID] What are the differences between the created and mounted lifecycle hooks?
  42. [MID] How do you implement transitions and animations in Vue.js?
  43. [MID] What are composables in Vue 3 and how do they replace mixins?
  44. [SENIOR] What are functional components in Vue.js and when are they beneficial?
  45. [SENIOR] How do you manage shared state across micro-frontends built with Vue.js?
  46. [SENIOR] How do you resolve circular dependencies between Vue components?
  47. [SENIOR] What are the common sources of memory leaks in Vue.js applications and how do you prevent them?
  48. [EXPERT] How does Vue 3's compiler optimize templates at build time with static hoisting, patch flags, and tree flattening?
  49. [EXPERT] How does Vue's reactivity system track dependencies through effect scopes and what are the edge cases with collections like Map and Set?
  50. [JUNIOR] How do you bind CSS classes and inline styles dynamically in Vue.js?
  51. [JUNIOR] What is the purpose of the v-once directive?
  52. [MID] How does Vue.js handle error boundaries and error handling in components?
  53. [MID] What is the Virtual DOM and how does Vue.js use it for efficient rendering?
  54. [MID] How do you perform form validation in Vue.js applications?
  55. [SENIOR] How do you implement accessible (a11y) Vue.js components following WCAG guidelines?
  56. [SENIOR] What strategies do you use for testing Vue.js components with Vue Test Utils and Vitest?
  57. [SENIOR] How would you migrate a large Vue 2 application to Vue 3?
  58. [EXPERT] How does the Vue 3 scheduler batch and prioritize component updates, and how does it differ from React's concurrent mode?
  59. [EXPERT] How would you implement a custom renderer using Vue 3's createRenderer API for non-DOM targets?
  60. [JUNIOR] What is the purpose of the v-html directive and what are its security risks?
  61. [JUNIOR] How do you create custom events in Vue.js to communicate from child to parent?
  62. [MID] What are the differences between template-based syntax and render functions in Vue.js?
  63. [MID] How do you integrate TypeScript with Vue 3 and the Composition API?
  64. [SENIOR] How do you implement real-time features in Vue.js using WebSockets or Server-Sent Events?
  65. [SENIOR] What are the trade-offs between using Vuex modules with namespacing versus Pinia stores?
  66. [EXPERT] What is the Suspense component in Vue 3, how does it handle async dependencies, and what are its current limitations?
  67. [EXPERT] How does Vue's virtual DOM diffing algorithm work and what heuristics does it use to optimize list reconciliation?
  68. [EXPERT] How do you implement fine-grained reactivity patterns using shallowRef, shallowReactive, and triggerRef for performance-critical scenarios?
  69. [JUNIOR] What is the difference between local and global component registration?
  70. [SENIOR] How do you configure and optimize Vue.js applications for deployment behind a CDN?
  71. [EXPERT] How does Vue handle server-side rendering hydration mismatches and what strategies exist for debugging them?
  72. [EXPERT] What are the internals of Vue's keep-alive component and how does its LRU cache eviction strategy work?
  73. [EXPERT] How do you build custom compile-time macros using Vue's compiler plugin API (e.g., defineModel, defineSlots)?