Skip to main content

Vaadin interview questions and Answers

What Is Vaadin?
The Vaadin is a web application framework, open source platform and built on Google Web Toolkit (GWT) written in Java.

The Vaadin Framework is created and supported by Vaadin Ltd, a Finnish company founded 11 years ago and Vaadin licensed under the Apache 2.0 license.
The Vaadin platform includes a big set of web components, application starters, performance, accessibility and tools for building great looking apps faster in Java.

The Vaadin allows the implementation of HTML5 web user interfaces using the Java.

The components are built as standard HTML elements that can be used in any framework.

The Vaadin is 100% Java. No JavaScript or any other languages required. You don't need to know any languages other than Java to build great web applications.

What are the Vaadin goals?
The main goal of Vaadin is creating user interfaces for business applications.

We have followed the following rules i.e.
1.      Right tool for the right purpose
2.      Choice between declarative and dynamic UIs
3.      Simplicity and maintainability
4.      Tools should not limit your work
5.      And so on

How to install the Vaadin components?
The Vaadin components are typically installed with npm or Bower.

Prerequisites -
1.      JDK installed
2.      Eclipse Mars installed and working
3.      Vaadin plug-in installed
4.      Tomcat 8 installed and running
Steps in Vaadin Installation -
1.      Java installation
2.      IDE installation
3.      Application Server Requirements

How to use Vaadin?
I believe Vaadin is super easy to use. You just need Maven and a Java compiler. Make it easy on yourself though, and bring an IDE to the party.

Though you don’t really need an IDE, it does make your life easier, since there is a probably a Vaadin plugin for your IDE.

IDE plugin - The easiest way to get started is by using an IDE like Eclipse or NetBeans, and there are free plugins for both. If you have IntelliJ Ultimate, then Vaadin has a plugin for that too.

What are the features of Vaadin?
The following features of the Vaadin -
1.      You don't need to know any languages other than Java to build great web applications.
2.      You'll get your first Vaadin app running in minutes and you can continue until you have a simple UI built for a customer database.
3.      Vaadin Flow allows defining the HTML templates with automated client-server communication and data binding in case of using Polymer-based templates.
4.      Vaadin Flow includes Spring Frameworks.
5.      Router is an essential and core concept in Vaadin Flow and enables navigation via URLs
6.      Data binding is done via the Binder class and it allows synchronizing the values in input fields with server-side data models.

What Is Architecture Diagram of Vaadin?

What are the add-ons?
The Add-ons are the ways to share your own components between projects. Some add-ons are free and some are commercial or dual licensed.

The Vaadin web components, themes, layouts, and data sources inbuilt into the core library, many others are available as add-ons.

The add-ons are divided to the following categories -
1.      Themes
2.      UI components
3.      Data components
4.      Miscellaneous

What are Vaadin components?
The components are building blocks for modern web applications.

The Vaadin components is an evolving set of high quality user interface web components commonly needed in modern mobile and desktop business web applications.

The Vaadin has a comprehensive set of beautifully crafted, performing, and adaptable UI components for modern mobile first Web applications.

The Web Components looks like -
1.      vaadin-grid
2.      vaadin-board
3.      vaadin-list-box
4.      vaadin-button
5.      vaadin-dialog
6.      vaadin-charts
7.      vaadin-checkbox
8.      vaadin-combo-box
9.      vaadin-confirm-dialog
10. vaadin-tabs
11. and so on

Labels

Labels:
By Anil Singh | Rating of this article (*****)

Popular posts from this blog

nullinjectorerror no provider for httpclient angular 17

In Angular 17 where the standalone true option is set by default, the app.config.ts file is generated in src/app/ and provideHttpClient(). We can be added to the list of providers in app.config.ts Step 1:   To provide HttpClient in a standalone app we could do this in the app.config.ts file, app.config.ts: import { ApplicationConfig } from '@angular/core'; import { provideRouter } from '@angular/router'; import { routes } from './app.routes'; import { provideClientHydration } from '@angular/platform-browser'; //This (provideHttpClient) will help us to resolve the issue  import {provideHttpClient} from '@angular/common/http'; export const appConfig: ApplicationConfig = {   providers: [ provideRouter(routes),  provideClientHydration(), provideHttpClient ()      ] }; The appConfig const is used in the main.ts file, see the code, main.ts : import { bootstrapApplication } from '@angular/platform-browser'; import { appConfig } from ...
Read more

List of Countries, Nationalities and their Code In Excel File

Download JSON file for this List - Click on JSON file    Countries List, Nationalities and Code Excel ID Country Country Code Nationality Person 1 UNITED KINGDOM GB British a Briton 2 ARGENTINA AR Argentinian an Argentinian 3 AUSTRALIA AU Australian an Australian 4 BAHAMAS BS Bahamian a Bahamian 5 BELGIUM BE Belgian a Belgian 6 BRAZIL BR Brazilian a Brazilian 7 CANADA CA Canadian a Canadian 8 CHINA CN Chinese a Chinese 9 COLOMBIA CO Colombian a Colombian 10 CUBA CU Cuban a Cuban 11 DOMINICAN REPUBLIC DO Dominican a Dominican 12 ECUADOR EC Ecuadorean an Ecuadorean 13 EL SALVA...
Read more

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin...
Read more

25 Best Vue.js 2 Interview Questions and Answers

What Is Vue.js? The Vue.js is a progressive JavaScript framework and used to building the interactive user interfaces and also it’s focused on the view layer only (front end). The Vue.js is easy to integrate with other libraries and others existing projects. Vue.js is very popular for Single Page Applications developments. The Vue.js is lighter, smaller in size and so faster. It also supports the MVVM ( Model-View-ViewModel ) pattern. The Vue.js is supporting to multiple Components and libraries like - ü   Tables and data grids ü   Notifications ü   Loader ü   Calendar ü   Display time, date and age ü   Progress Bar ü   Tooltip ü   Overlay ü   Icons ü   Menu ü   Charts ü   Map ü   Pdf viewer ü   And so on The Vue.js was developed by “ Evan You ”, an Ex Google software engineer. The latest version is Vue.js 2. The Vue.js 2 is very similar to Angular because Evan ...
Read more

.NET Core MVC Interview Questions and Answers

» OOPs Interview Questions Object Oriented Programming (OOP) is a technique to think a real-world in terms of objects. This is essentially a design philosophy that uses a different set of programming languages such as C#... Posted In .NET » .Net Constructor Interview Questions A class constructor is a special member function of a class that is executed whenever we create new objects of that class. When a class or struct is created, its constructor is called. A constructor has exactly the same name as that of class and it does not have any return type… Posted In .NET » .NET Delegates Interview Questions Delegates are used to define callback methods and implement event handling, and they are declared using the "delegate" keyword. A delegate in C# is similar to function pointers of C++, but C# delegates are type safe… Posted In .NET » ASP.Net C# Interview Questions C# was developed by Microsoft and is used in essentially all of their products. It is mainly used for ...
Read more