Vue Js Online Test

1. In Vuex, what is a store?

A component that manages state A global state management container A computed property A route definition

2. What is the primary purpose of the appear attribute in a Vue transition component?

To specify the initial appearance of an element To define computed properties To set the duration of a transition To manage routing

3. In Vue Resource, which HTTP method is typically used for retrieving data from a server?

GET POST PUT DELETE

4. In Vue, what is the purpose of the @ symbol when specifying event handlers in templates?

It's a shorthand for v-on It represents a component It indicates a computed property It defines a custom event

5. What is the primary purpose of state management in a Vue.js application?

To manage routing To manage component rendering To store and manage data To handle HTTP requests

6. 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

7. What is the purpose of pluralization in Vue Internationalization (i18n)?

To support multiple languages To manage routing To handle singular and plural forms To create custom directives

8. 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

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

Angular Django Express.js React

10. How do you create a new Vue instance?

const vm = new Vue({}) new Vue.Component({}) Vue.createInstance({}) VueInstance.create({})

11. Which method is used to watch for changes in a data property of a Vue instance?

watch observe onChange track

12. What is the key benefit of using Vue components in a web application?

Improved code organization Better performance Smaller bundle size Compatibility with older browsers

13. How do you apply a custom filter to an expression in a Vue template?

By using the v- prefix followed by the filter name By using the v-custom followed by the filter name By using the @ symbol followed by the filter name By using the | symbol followed by the filter name

14. In Vue, what is the role of the v-on directive when working with transitions and animations?

To define custom behavior when an element is clicked To handle HTTP requests To apply transitions to elements To manage routing

15. What is a snapshot test in Jest for Vue.js components?

A test that verifies the component's visual output A test that checks if the component is mounted A test that verifies user interactions A test that verifies transitions

16. How do you install Vue Router in a Vue.js project?

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

17. 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

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

Redux Vuex React Angular

19. How can you emit a custom event from a child component to its parent component in Vue?

Using the $emit() method Using the v-on directive Using the watch option Using the data property

20. In Vue, when are computed properties recalculated?

Whenever a method is called Whenever a data property changes When the component is created When explicitly triggered