Vue Js Online Test

1. Which testing framework is commonly used for testing Vue.js applications?

Jasmine Jest Mocha Karma

2. Which Vue.js utility can help you with mocking dependencies during testing?

Vue Router Vuex Vue Test Utils Vue Transitions

3. What is the purpose of the .stop event modifier in Vue?

To prevent event propagation To trigger an event once To capture events in the capture phase To prevent the default behavior

4. What is the purpose of setting up proper error handling in a deployed Vue.js application?

To enhance SEO performance To improve the user experience To create custom directives To add transitions and animations

5. How can you bind a CSS class to an element conditionally in Vue templates?

Using the v-style directive Using the v-bind:class directive Using the v-show directive Using the v-html directive

6. Which directive is used to bind an attribute's value to an expression in Vue?

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

7. Which library or tool is commonly used alongside Vue.js for state management?

Redux Vuex React Angular

8. In Vue, what is the syntax for using a custom directive in a template expression?

{{ expression | customDirective(arg) }} {{ expression.customDirective(arg) }} {{ customDirective(expression, arg) }}

9. 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

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

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

11. In Vue, what is the main benefit of using custom directives?

They allow you to define custom behavior on elements They simplify routing They automatically format data They create Vue components

12. What is Vue Internationalization (i18n) primarily used for?

To create custom directives To add transitions and animations To manage routing To translate Vue.js applications

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. Which Vue CLI service command compiles and hot-reloads for development?

vue run vue dev vue serve vue compile

15. What is the purpose of the npm run build command in Vue.js deployment?

To run unit tests To start the development server To create a production-ready build To add transitions and animations

16. What class is applied to an element when it enters the DOM with a Vue transition?

.v-enter .v-enter-active .v-exit .v-leave-active

17. How can you access the Vue instance itself within its own methods or lifecycle hooks?

By using this keyword By passing it as an argument By calling getInstance() By using self variable

18. Which development server is typically used by Vue CLI when running a project locally?

webpack-dev-server Express.js Django Nginx

19. 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

20. Which deployment method is typically used for hosting Vue.js applications on a shared web hosting service?

Docker containers Serverless architecture FTP (File Transfer Protocol) Content delivery networks (CDNs)