Vue.js Interview Questions and Answers
Intermediate / 1 to 5 years experienced level questions & answers
Ques 1. Explain Vue components and their advantages.
Vue components are reusable and self-contained units that encapsulate a specific piece of functionality. They promote code reusability, maintainability, and separation of concerns in a Vue application.
Ques 2. What is Vuex, and why would you use it?
Vuex is the state management library for Vue.js applications. It helps manage the state of the application in a centralized store, making it easy to maintain and share state across components.
Ques 3. Explain the concept of two-way data binding in Vue.js.
Two-way data binding in Vue.js allows automatic synchronization of data between the model and the view. It is achieved using the v-model directive, which binds an input element to a variable and updates both the input value and the variable when either changes.
Ques 4. What is a computed property in Vue.js?
A computed property in Vue.js is a property whose value is derived from other reactive data. It is recalculated only when its dependencies change, providing a way to perform calculations on the fly without re-rendering unnecessarily.
Ques 5. Explain the concept of mixins in Vue.js.
Mixins in Vue.js are a way to reuse and share logic across multiple components. They allow you to encapsulate and distribute reusable functionality by merging the properties and methods of a mixin into a component.
Ques 6. Explain the concept of scoped slots in Vue.js.
Scoped slots in Vue.js allow a child component to communicate data to a parent component. It provides more flexibility in passing data from child to parent.
Ques 7. What is the difference between mixins and extends in Vue.js?
Mixins allow you to reuse and share logic across multiple components, while extends in Vue.js create an extended constructor for a component, inheriting options from another component.
Ques 8. Explain the purpose of the key attribute in Vue.js.
The key attribute in Vue.js is used to give each rendered element a unique identifier, helping Vue efficiently update the DOM by reusing existing elements instead of re-rendering.
Ques 9. How does the v-model directive work in Vue.js?
The v-model directive in Vue.js is used for two-way data binding on form input elements. It automatically syncs the input value with a variable in the data.
Ques 10. What is the purpose of the provide/inject feature in Vue.js?
Provide/inject in Vue.js allows a component to provide data that can be injected into its descendants. It helps in prop drilling by providing a clean way to share state without using props.
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