100 Must-Know Vue.js Interview Questions and Answers 2024

Vue.js Fundamentals

1.
What is Vue.js and why would you use it?
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2.
How do you set up a project with Vue.js?
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3.
Can you explain the Vue.js lifecycle hooks?
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4.
What are Vue.js components and how do you use them?
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5.
How do you bind data to the view in Vue.js?
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6.
What is a Vue instance and its purpose?
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7.
Explain the virtual DOM in Vue.js.
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8.
What are directives in Vue.js? Can you give examples?
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9.
How do you handle user inputs and form submissions in Vue.js?
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10.
Discuss the methods property in a Vue component.
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Vue.js Data Binding and Computed Properties

11.
Explain the difference between v-bind and v-model.
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12.
What are computed properties and how are they used?
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13.
Can you discuss the difference between computed properties and methods?
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14.
What are watchers in Vue.js?
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15.
How do you bind inline styles in a Vue template?
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Vue.js Components and Props

16.
How do you pass data to a child component using props?
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17.
Discuss the validate and default properties of a prop.
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18.
What is prop drilling and how can it be avoided in Vue.js?
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19.
What are slots in Vue.js components?
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20.
How do you make a reusable component in Vue.js?
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Vue.js Events and Event Handling

21.
Explain how to handle native events in Vue.js.
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22.
What is event propagation and how to control it in Vue.js?
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23.
Describe the .prevent and .stop event modifiers.
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24.
When would you use the .once event modifier?
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25.
How do you create a custom event in Vue.js?
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Vue.js Directives and Render Functions

26.
What is the purpose of the v-if and v-for directives?
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27.
How do you use the v-show directive and how does it differ from v-if?
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28.
Discuss Vue.js’s built-in directives and their purposes.
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29.
What are the key differences between v-bind and v-on?
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30.
How do you use a render function in Vue.js?
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Vue.js State Management with Vuex

31.
What is Vuex?
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32.
Explain the concept of store in Vuex.
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33.
How do you manage state in a Vue.js application without Vuex?
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34.
What are the core concepts of Vuex?
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35.
What is the purpose of mutations and actions in Vuex?
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Vue.js Routing with Vue Router

36.
What is Vue Router and why is it used?
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37.
Discuss how to set up routing in a Vue.js application.
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38.
How do you navigate between pages in Vue.js?
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39.
What is a dynamic route and how do you create one in Vue Router?
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40.
How do you handle nested routes in Vue Router?
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Vue.js Mixins and Custom Directives

41.
What are mixins and how would you use them?
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42.
How do mixins merge with component options?
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43.
What is a custom directive and how can you create one?
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44.
How do you register a global directive in Vue.js?
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45.
Discuss a practical use-case for custom directives.
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Vue.js Tooling and Project Management

46.
What is Vue CLI and what can it do?
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47.
How do you add a pre-processor like SASS to a Vue project?
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48.
Discuss the purpose of Vue DevTools.
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49.
How do you configure a Vue.js project to work with different environments?
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50.
Describe how to optimize the performance of a Vue.js application.
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Advanced Component Usage

51.
What are functional components in Vue.js?
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52.
How do you use the provide and inject features in Vue.js?
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53.
Discuss component registration in Vue.js.
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54.
How do you handle non-reactive data in a Vue component?
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55.
What are higher-order components in Vue.js?
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Vue.js Reactivity System

56.
What is Vue.js reactivity and how does it work?
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57.
How do you reactively add new properties to a Vue instance?
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58.
Explain the Vue.js Observer pattern.
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59.
What is the role of the dep class in the Vue.js reactivity system?
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60.
How do you create a computed setter in Vue.js?
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Vue.js Transitions and Animations

61.
Discuss how Vue.js handles transitions.
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62.
How could you apply a transition to a list of items?
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63.
What is the difference between CSS transitions and animations?
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64.
How do you create JavaScript-based animations in Vue.js?
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65.
What are the hooks available in Vue.js for entering and leaving transitions?
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Vue.js Best Practices

66.
What are the best practices for code organization in large Vue.js applications?
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67.
Explain the importance of key attribute in list rendering.
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68.
How should you structure components in a large application for better scalability and maintainability?
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69.
Why is it important to avoid using this inside template expressions?
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70.
How do you keep your Vue.js methods readable and concise?
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Vue.js Testing and Debugging

71.
How do you write unit tests for Vue.js components?
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72.
What testing frameworks are commonly used with Vue.js?
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73.
Discuss the best ways to debug a Vue.js application.
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74.
What are some Vue-specific testing considerations?
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75.
How do you test Vuex actions?
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Vue.js Plugins and Extending Vue Functionality

76.
How do you create a Vue.js plugin?
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77.
What are filters in Vue.js and how do you create one?
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78.
How can you integrate a third-party library that is not specifically designed for Vue.js?
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79.
Discuss how to use a Vue mixin globally.
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80.
What are Vue.js Mixins, and how do you make a global mixin?
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Integration with Backend Services

81.
How do you manage API calls in Vue.js?
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82.
Discuss strategies for server-side rendering with Vue.js.
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83.
What is Nuxt.js and how does it relate to Vue.js?
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84.
Can you explain the process of static site generation with Vue.js?
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85.
How do you handle authentication in a Vue.js application?
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Vue.js Single File Components (SFC)

86.
What is a Single File Component (SFC) in Vue.js?
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87.
Discuss the structure of a Single File Component.
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88.
What are the benefits of using Single File Components in Vue.js?
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89.
How do you use scoped styles in Single File Components?
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90.
Explain the use of custom blocks in Vue Single File Components.
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Vue.js 3.x Features and Changes

91.
What are the new features introduced in Vue.js 3?
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92.
How does the Composition API differ from the Options API?
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93.
Discuss the new reactivity system introduced in Vue.js 3.
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94.
Explain the changes to the VDOM in Vue.js 3 and their impacts.
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95.
What improvements have been made to the Slots syntax in Vue.js 3?
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Best Practices for Large Scale Vue.js Applications

96.
How can you manage global state without Vuex in a large application?
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97.
Discuss strategies for code-splitting in a Vue.js application.
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98.
What are the considerations for lazy loading components in Vue.js?
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99.
Explain the techniques for managing large-scale routing in Vue.js.
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100.
How do style and architecture decisions impact the scalability of Vue.js applications?
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100 Vue.js interview questions

What is Vue.js and why would you use it?

How do you set up a project with Vue.js?

Can you explain the Vue.js lifecycle hooks?

What are Vue.js components and how do you use them?

How do you bind data to the view in Vue.js?

What is a Vue instance and its purpose?

Explain the virtual DOM in Vue.js.

What are directives in Vue.js? Can you give examples?

How do you handle user inputs and form submissions in Vue.js?

Discuss the methods property in a Vue component.

Explain the difference between v-bind and v-model.

What are computed properties and how are they used?

Can you discuss the difference between computed properties and methods?

What are watchers in Vue.js?

How do you bind inline styles in a Vue template?

How do you pass data to a child component using props?

Discuss the validate and default properties of a prop.

What is prop drilling and how can it be avoided in Vue.js?

What are slots in Vue.js components?

How do you make a reusable component in Vue.js?

Explain how to handle native events in Vue.js.

What is event propagation and how to control it in Vue.js?

Describe the .prevent and .stop event modifiers.

When would you use the .once event modifier?

How do you create a custom event in Vue.js?

What is the purpose of the v-if and v-for directives?

How do you use the v-show directive and how does it differ from v-if?

Discuss Vue.js’s built-in directives and their purposes.

What are the key differences between v-bind and v-on?

How do you use a render function in Vue.js?

What is Vuex?

Explain the concept of store in Vuex.

How do you manage state in a Vue.js application without Vuex?

What are the core concepts of Vuex?

What is the purpose of mutations and actions in Vuex?

What is Vue Router and why is it used?

Discuss how to set up routing in a Vue.js application.

How do you navigate between pages in Vue.js?

What is a dynamic route and how do you create one in Vue Router?

How do you handle nested routes in Vue Router?

What are mixins and how would you use them?

How do mixins merge with component options?

What is a custom directive and how can you create one?

How do you register a global directive in Vue.js?

Discuss a practical use-case for custom directives.

What is Vue CLI and what can it do?

How do you add a pre-processor like SASS to a Vue project?

Discuss the purpose of Vue DevTools.

How do you configure a Vue.js project to work with different environments?

Describe how to optimize the performance of a Vue.js application.

What are functional components in Vue.js?

How do you use the provide and inject features in Vue.js?

Discuss component registration in Vue.js.

How do you handle non-reactive data in a Vue component?

What are higher-order components in Vue.js?

What is Vue.js reactivity and how does it work?

How do you reactively add new properties to a Vue instance?

Explain the Vue.js Observer pattern.

What is the role of the dep class in the Vue.js reactivity system?

How do you create a computed setter in Vue.js?

Discuss how Vue.js handles transitions.

How could you apply a transition to a list of items?

What is the difference between CSS transitions and animations?

How do you create JavaScript-based animations in Vue.js?

What are the hooks available in Vue.js for entering and leaving transitions?

What are the best practices for code organization in large Vue.js applications?

Explain the importance of key attribute in list rendering.

How should you structure components in a large application for better scalability and maintainability?

Why is it important to avoid using this inside template expressions?

How do you keep your Vue.js methods readable and concise?

How do you write unit tests for Vue.js components?

What testing frameworks are commonly used with Vue.js?

Discuss the best ways to debug a Vue.js application.

What are some Vue-specific testing considerations?

How do you test Vuex actions?

How do you create a Vue.js plugin?

What are filters in Vue.js and how do you create one?

Explain the difference between `v-bind` and `v-model`.

Describe the `.prevent` and `.stop` event modifiers.

When would you use the `.once` event modifier?

What is the purpose of the `v-if` and `v-for` directives?

How do you use the `v-show` directive and how does it differ from `v-if`?

What are the key differences between `v-bind` and `v-on`?

How do you use the `provide` and `inject` features in Vue.js?

What is the role of the `dep` class in the Vue.js reactivity system?

Why is it important to avoid using `this` inside template expressions?