Vue Js Online Test

1. Which option is used to specify the HTML element that a Vue instance will be mounted to?

el element mount attach

2. How can you change the active language/locale in a Vue.js application with vue-i18n?

By modifying the Vue instance By using the vue-translate library By adding transitions and animations By using the $i18n object

3. Which command is used to install Vue CLI globally?

npm install vue-cli -g npm install -g vue-cli npm install -global vue-cli npm global add vue-cli

4. 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

5. 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

6. What is Vue.js mainly used for?

Building user interfaces Server-side scripting Game development Mobile app development

7. In Vue, when does a watcher function get executed?

When a computed property changes When a data property changes When explicitly triggered When the component is created

8. What is the purpose of slots in Vue components?

To pass data between components To define computed properties To provide a template for content To register global components

9. How can you install Vue Resource in a Vue.js project?

It's included by default in Vue.js Using the vue add resource command Manually download and configure Install it as a global package

10. What is the purpose of the .then() method when making an asynchronous HTTP request in Vue Resource?

To define route parameters To handle the response To prevent the default behavior To cancel the request

11. Which JavaScript framework is often compared to Vue.js for building user interfaces?

Angular Django Express.js React

12. What is the role of the "vue.config.js" file in a Vue.js project?

To configure project settings and plugins To define component templates To store API keys and secrets To manage database migrations

13. Which library is commonly used for Vue.js Internationalization (i18n)?

vue-i18n vue-router vuex vue-translate

14. In Vue, what is the purpose of the <transition> component?

To create custom transitions To define computed properties To manage routing To create custom directives

15. 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

16. 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

17. What is a mutation in the context of Vuex?

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

18. Which of the following is a core feature of Vue.js?

Component-based architecture Database management Server-side rendering Browser compatibility

19. What is the primary purpose of testing in Vue.js applications?

To create custom directives To format data in templates To ensure the application functions as expected To add transitions and animations

20. How can you validate user input in a Vue form?

Using the v-validate directive Using v-bind directive Using the v-model directive Using v-validate event