Foundation of Vue Js 1 — Questions and Answers
Question 1: Describe Vue.js.
- It is an open-source front-end JavaScript framework for developing user interfaces. (Correct answer)
- It is an open-source, cross-platform, JavaScript run-time situations that perform the JavaScript program outside a web browser.
- It is a JavaScript library constructed to facilitate HTML DOM tree traversal and administration, and event handling, CSS activity, and Ajax.
- It is an open-source JavaScript library for developing user interfaces.
Correct answer: It is an open-source front-end JavaScript framework for developing user interfaces.
Vue.js is a progressive, open-source JavaScript framework specifically designed for building user interfaces and single-page applications. It focuses on the view layer, making it easy to integrate into existing projects or use for complex front-end development. Its reactivity system and component-based architecture are key features.
Question 2: What is the purpose of Vue.js?
- With the help of a JavaScript library, it is possible to create user interfaces for single-page applications by breaking the UI up into modular parts.
- It ties data to specific DOM elements using the MVVM paradigm.
- The creation of user interfaces usually makes use of this dynamic JavaScript framework. (Correct answer)
- All of the above
Correct answer: The creation of user interfaces usually makes use of this dynamic JavaScript framework.
Vue.js is primarily used for building interactive and dynamic user interfaces (UIs) and single-page applications (SPAs). It provides a reactive data-binding system and a component-based architecture that simplifies the development of complex front-end applications, allowing developers to efficiently manage the view layer of their web applications.
Question 3: All of the event listeners are automatically deleted after a view model is lost.
- True (Correct answer)
- False
- Sometimes
Correct answer: True
In Vue.js, when a component (or view model) is destroyed or unmounted, Vue's reactivity system automatically cleans up its associated event listeners and watchers. This prevents memory leaks and ensures that the application remains efficient by removing references to elements that no longer exist in the DOM.
Question 4: How are vue resources installed?
- # yarn add vue-resource
- @ yarn add vue-resource
- & yarn add vue-resource
- $ yarn add vue-resource (Correct answer)
Correct answer: $ yarn add vue-resource
The correct command to install the `vue-resource` package using Yarn, a popular package manager for JavaScript, is `$ yarn add vue-resource`. The `$` symbol typically denotes a command to be run in the terminal, and `yarn add` is the command for adding a new dependency to a project.
Question 5: How are vue plugins installed?
- MyPlugin.install = function (Vue, options) {}. (Correct answer)
- MyPlugin.install = function=() {}.
- MyPlugin.install = = function (Vue, options[]) {}.
- None of these
Correct answer: MyPlugin.install = function (Vue, options) {}.
Vue.js plugins are typically exposed as an object with an `install` method. This `install` method receives the `Vue` constructor as its first argument, along with an optional `options` object. This standard structure allows plugins to extend Vue's functionality, such as adding global methods, directives, or components.
Question 6: How many different kinds of directives are there in vue.js?
- 5
- 2
- 8
- 4 (Correct answer)
Correct answer: 4
While Vue.js has many built-in directives, they can generally be categorized into a few main types based on their purpose: content rendering (`v-text`, `v-html`), conditional rendering (`v-if`, `v-show`), list rendering (`v-for`), and event handling/two-way binding (`v-on`, `v-model`). These four categories cover the most common use cases for directives in Vue.js templates.
Question 7: What is MVVM's complete form?
- Mode-View-ValueModel
- Model-View-ViewModel (Correct answer)
- Mode-View-ViewModel
- Module-Value-ValueModel
Correct answer: Model-View-ViewModel
MVVM stands for Model-View-ViewModel, which is a software architectural pattern. Vue.js is heavily inspired by and utilizes this pattern, where the Model represents the data, the View is the UI, and the ViewModel acts as an abstraction of the View, containing presentation logic and data binding to the Model.
Foundation of Vue Js 1
Describe Vue.js.