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Vue.js

100 Vue.js interview questions

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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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