Vue.Js Developer Interview Questions and Answers

A minimal Web Application with CRUD features

• Use Vue.js framework for front-end development

• Create a RESTful API using Node.js and Express.js for back-end

• Use MongoDB for database management

• Implement basic CRUD operations for data manipulation

• Use Axios for HTTP requests

• Implement form validation for user input

• Use Bootstrap for styling and responsiveness

Axios is a popular JavaScript library used to make HTTP requests from the browser or Node.js.

• Axios is a promise-based HTTP client for making asynchronous requests.

• It can be used in both browser and Node.js environments.

• Axios supports interceptors for request and response handling.

• It can handle JSON data, file uploads, and more.

• Some common HTTP methods used with Axios are GET, POST, PUT, DELETE.

Implementing v-model on an online editor for Vue.js

• Create a data property in the Vue instance to bind to the v-model

• Use the v-model directive on the input element to bind it to the data property

• Make sure to update the data property when the input value changes

Arrow functions are a concise way to write functions in JavaScript.

• Arrow functions do not have their own 'this' keyword.

• They have a shorter syntax compared to traditional function expressions.

• Arrow functions are often used in ES6 for cleaner and more readable code.

• Example: const add = (a, b) => a + b;

Props are used to pass data from parent to child components, while events are used to communicate from child to parent components.

• Props are read-only and cannot be modified by the child component

• Events are emitted using $emit() method and can be listened to using v-on directive

• Props can have default values and can be validated using prop types

• Events can have arguments passed along with them

Vuex is a state management library for Vue.js applications.

• Centralized store for all components

• Allows for easy state management and mutation

• Can be used for handling asynchronous actions

• Helps with debugging and testing

• Example: storing user authentication status

A component is a reusable, self-contained piece of code that defines the appearance and behavior of a part of a user interface.

• Components can be used to break down complex UIs into smaller, manageable pieces.

• They can be reused across different parts of an application.

• Components can have their own state, props, and lifecycle methods.

• Examples include buttons, forms, modals, and navigation bars.

Lifecycle hooks in Vue.js are special methods provided by Vue that allow you to perform actions at specific stages of a component's lifecycle.

• Created: Called after the instance has been initialized, before data observation and event/watcher setup.

• Mounted: Called after the instance has been mounted (i.e., added to the DOM).

• Updated: Called after a data change causes the virtual DOM to re-render and patch the real DOM.

• Destroyed: Called when a component is destroyed, useful for c...read more