Vue Js Online Test

1. In Vuex, what is an action and when would you use it?

A way to change the component's data A way to make asynchronous API calls A way to modify state directly A way to define route parameters

2. What is the primary benefit of using Vuex in an SSR Vue.js application?

To improve SEO performance To manage client-side state To create custom directives and filters To handle server-side rendering

3. What is the difference between a computed property and a watcher in Vue?

Computed properties are asynchronous Watchers are used for data mutation Computed properties are cached Watchers can return new values

4. How do you specify different transitions for entering and leaving elements in Vue?

By using separate <transition> components By defining custom CSS classes for each transition By using the v-transition directive By setting a Vue transitionType option

5. What is the purpose of the @input event in a Vue form element?

To bind data to form inputs To validate user input To update a computed property To submit the form

6. How can you access the data properties of a Vue instance?

vm.data vm.state vm.props vm.$data

7. Which Vue CLI command is used to create a new Vue.js project with SSR support?

vue create project-name vue init ssr project-name vue add ssr vue ssr create project-name

8. In Vue Resource, what is the role of the params option in an HTTP request?

To define route parameters To include query parameters To specify request headers To define request data

9. What is Vue.js?

A JavaScript library A programming language An operating system A database management system

10. How does SSR in Vue.js handle initial page loads for better performance?

It renders Vue components on the client-side It pre-renders Vue components on the server-side It loads all components lazily It caches the entire application

11. In Vue Router, what is the purpose of the beforeEach navigation guard?

To specify the route layout To define route parameters To perform actions before each route change To protect routes from unauthorized access

12. How can you pass data from the server to the client in SSR with Vue.js?

By using the v-model directive By modifying the data property in components By using Vuex By including it in the HTML response

13. In a Vue form, what is the role of the v-bind directive?

To bind data to form inputs To bind data to computed properties To define computed properties To submit the form

14. How can you conditionally render an element based on a boolean in Vue?

Using the v-show directive Using the v-bind directive Using the v-for directive Using the v-if directive

15. What is the primary purpose of making HTTP requests in a Vue.js application?

To render HTML templates To manage routing To fetch or send data To define computed properties

16. Which directive is used to bind the value of an input element to a data property in Vue templates?

v-model v-bind v-on v-show

17. What is the main benefit of using SSR in a Vue.js application?

Improved SEO Faster client-side rendering Simplified component management Enhanced animation capabilities

18. Which of the following is NOT a common way to deploy a Vue.js application?

Publishing to an app store Hosting on a web server Deploying to a cloud platform Using a content delivery network (CDN)

19. What is the purpose of the vue-ssr library in Vue SSR?

To create a new Vue project with SSR support To manage SSR-specific configuration To run unit tests with SSR To add transitions and animations

20. What is the Vue.js ecosystem primarily centered around?

Front-end web development Back-end web development Mobile application development Game development