Vue JS

Vue.js is an essentially adopted progressive JavaScript framework for constructing interactive web interfaces and even single-page applications. Simple, reactive, and highly modular, this framework easily gains the developers’ trust. This is a list of must-read questions on Vue.js along with its answers that help you cement your understanding on core subjects such as components, directives, data binding, event handling, lifecycle hooks, Vue Router, and Vuex.

These multiple-choice questions cater to developers at all levels, whether you are preparing for an interview, revising concepts, or exploring advanced Vue.js features. You will get insights into how to create reusable components, how to handle state effectively, optimize the performance of an application, and leverage directives for dynamic rendering. Topics include practical implementation techniques, the advantages of reactive data models, and comparisons to other frameworks like React or Angular.

A good tool for all beginner and professional developers: not only sharpens your skills but will enable you to learn the fundamental principles that come along with Vue.js. Take the depth of knowing in regards to Vue CLI, composition API, template syntax, learning how to incorporate third-party libraries, APIs, and more for you to be able to master and create high performance web applications that scale.

Whether you’re brushing up on the basics or venturing into more advanced topics, these questions are crafted to make your learning journey seamless and enjoyable. Vue.js is shaping modern web development, and this resource will guide you in harnessing its full potential for your next project. Unlock the power of Vue.js and take your development skills to the next level!

 

START LEARNING

#1. What is Vue.js?

A database management system

A JavaScript framework for building user interfaces

A CSS framework

A library for backend development

#2. Who created Vue.js?

Ryan Dahl

Evan You

Dan Abramov

Brendan Eich

#3. Which directive is used for binding data in Vue.js?

v-show

v-bind

v-for

v-if

#4. What is the root element in a Vue app called?

Root Component

App Root

Root Node

Main Node

#5. How do you create a Vue instance?

createApp()

new VueApp()

new Vue()

Vue.create()

#6. Which directive is used for conditionally rendering elements?

v-show

v-model

v-bind

v-if

#7. What is the purpose of the v-for directive?

To create forms

To loop through items in an array

To conditionally render elements

To add event listeners

#8. What is Vuex used for in Vue.js?

State management

CSS styling

Event handling

Routing

#9. What is the use of the v-model directive?

For two-way data binding

To loop through arrays

To bind text

To apply styles

#10. What is the purpose of the mounted lifecycle hook?

To perform operations after the DOM is updated

To render elements to the DOM

To initialize components

To clean up resources

#11. What is the default file extension for Vue components?

.jsx

.js

.html

.vue

#12. What is the purpose of a Vue router?

To handle API requests

To optimize performance

To enable navigation between components

To validate forms

#13. Which keyword is used to define props in Vue.js?

computed

data

methods

props

#14. How do you pass data to a child component?

Using v-bind

Using slots

Using events

Using props

#15. What is the Vue Devtools browser extension used for?

Testing APIs

Debugging Vue applications

Writing Vue code

Managing databases

#16. What is the created lifecycle hook used for?

To fetch data before rendering

To clean up resources

To initialize the Vue instance

To destroy components

#17. Which directive is used to handle events in Vue.js?

v-event

@ (shorthand for v-on)

v-click

v-action

#18. How do you define reactive data in a Vue instance?

In the props option

In the data option

In the methods option

In the computed option

#19. What does the key attribute in Vue.js help with?

Rendering lists efficiently

Styling components

Fetching API data

Lifecycle management

#20. What is the Vue CLI?

A command-line interface for scaffolding Vue applications

A plugin for Vuex

A tool for testing Vue apps

A library for animations

#21. What does Vue.use() do?

Registers a plugin

Configures Vuex

Sets up the router

Declares components

#22. What is a Vue mixin?

A directive for animations

A type of Vue component

A reusable piece of Vue configuration

A method to mix styles

#23. What does the .sync modifier do?

Syncs state with Vuex

Updates CSS styles dynamically

Syncs props and child components

Syncs data with the API

#24. What is a slot in Vue.js?

A placeholder for dynamic content

A feature of Vuex

A method for binding data

A directive for animations

#25. Which Vue lifecycle hook is called after the DOM is updated?

beforeUpdate

destroyed

mounted

updated

#26. What is Vue.observable() used for?

Observing DOM changes

Fetching API data

Validating forms

Creating a reactive object outside components

#27. What does Vue.config do?

Handles styling

Changes global Vue settings

Configures routing

Manages API endpoints

#28. What is the Vue Router method to navigate programmatically?

router.route()

router.go()

router.navigate()

router.push()

#29. How do you define a method in Vue.js?

Inside the props option

Inside the data option

Inside the methods option

Inside the template

#30. Which Vue directive binds a value to an input field?

v-model

v-on

v-bind

v-text

#31. What is a scoped slot?

A slot that is hidden by default

A slot with conditional rendering

A slot that shares data with the parent component

A reusable mixin for slots

#32. What is the purpose of the watch option in Vue?

To watch for changes in props

To watch for changes in data and perform actions

To manage events

To observe changes in the DOM

#33. What does the emit method do in Vue.js?

Triggers state changes

Registers a plugin

Updates computed properties

Emits custom events from a child to a parent

#34. How do you import Vue into a JavaScript file?

const Vue = 'vue'

load Vue from 'vue'

require('vue')

import Vue from 'vue'

#35. Which directive is used for inline styles in Vue?

v-class

v-text

v-bind:style

v-html

#36. What does the this.$refs object provide?

The Vuex store

A list of child components

Direct references to DOM elements or child components

The current Vue instance properties

#37. How do you define a computed property in Vue?

Inside the data option

Inside the methods option

Inside the computed option

Inside the props option

#38. What is the difference between props and data in Vue?

Props are for child-to-parent communication; data is for templates

Props are for parent-to-child communication; data is for internal state

Props are immutable; data is reactive

Props are for global state; data is for Vuex

#39. Which Vue directive is used for custom event listeners?

v-click

v-custom

v-bind:event

v-on

#40. What does Vue.nextTick() do?

Updates the DOM immediately

Delays API calls

Defers DOM updates until after the next tick

Triggers lifecycle hooks

Previous

Finish

Results

Congratulations !

Opps! Try Again

For More Information Visit : – India gk

Contact for website Design and development – Chaturbhuja Sons