Skip to main content

Java Play Framework Interview Questions and Answers

What Is Play Framework?
Play Framework is an open-source, type-safe reactive platform, and high-productivity written in Scala and Java. Play Framework is used to build scalable, fast, and real-time web applications with Java and Scala.
Play was created in May 2007 by software developer Guillaume Bort, while working at Zengularity SA (formerly known as Zenexity). Play is heavily inspired by ASP.NET MVC, Ruby on Rails and Django.

Now Play 2 is fully RESTful - there is no Java EE session per connection. It is also supports to JUnit and Selenium for unit testing.

Is Play Framework open-source?
Yes! Play Framework is an open-source and Licensed under the Apache License, Version 2.0.

What Is The Advantage Of Play Framework?
The list of Advantage of Play Framework is -
1.      Open Source
2.      Fully RESTful framework
3.      Modern stacks
4.      Java and Scala
5.      Amazing error handling
6.      Reactive
7.      Supported
8.      Flexible
9.      Graphically improved developer productivity
10. A full embedded testing framework and an automatic file uploads functionality

Is Play Framework follows MVC pattern?
Yes! Play Framework follows MVC (model–view–controller) architectural pattern.

Which is the latest version?
The latest version of Play Framework is - 2.6.20

What’s new in Play 2.6?
1.      Scala 2.12 support
2.      Injectable Twirl Templates
3.      Added gzip filter
4.      Just as in Scala, Play now has components to enable Java Compile Time Dependency Injection.
5.      Play now uses JSON Web Token (JWT) format for session and flash cookies
6.      SLF4J Marker support has been added to play.Logger and play.api.Logger
7.      Play’s support for futures in asynchronous operations has been improved, using the Futures trait.
8.      Updated Templates with Preconfigured CustomExecutionContexts
9.      Filters Enhancements
10. Testing Improvements
11. Play JSON improvements
12. File Upload Improvements

How to migrate?
The following steps need to be taken to update -
1.      Play upgrade
2.      Sbt upgrade to 0.13.15
3.      Guice DI support moved to separate module
4.      OpenID support moved to separate module
5.      Play JSON moved to separate project
6.      Play Iterates moved to separate project

Labels

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

Popular posts from this blog

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

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

Top 15+ Angular 17 Interview Questions Answers | For Experienced Professionals as well

G Google team released the latest version of Angular – Angular 17 on November 6, 2023, creating a significant milestone for the super fast front-end development. What Are the New Features in Angular 17? 1.       Angular 17 is the highly anticipated release for the community, bringing many new exciting features, updates, and improvements. 2.       New Syntax for Control Flow in Templates - new @if, @switch, @for, @case, @empty @end control flow syntax 3.       Deferred Loading - @defer partial template 4.       The Angular signals API 5.       Angular SSR and client hydration 6.       Automatic Migration to Build-in Control Flow 7.       Build Performance with ESBuild 8.       By default, set this newly generated component as a standalone, and now we don't have an app module file. To use (ng...
Read more

SOLID-Liskov Substitution Principle (LSP) Real-Time Example in C#

The SOLID Principles are the design principles that enable us to manage several software design problems. These principles provide us with ways to move from tightly coupled code to loosely coupled and encapsulated real business needs properly. Also readable, adaptable, and scalable code. The SOLID Principles  guide developers as they write readable, adaptable, and scalable code or design an application. The SOLID Principles can be applied to any OOP program. The SOLID Principles were developed by computer science instructor and author Robert C. Martin. Now, SOLID principles have also been adopted in both agile development and adaptive software development. The 5 principles of SOLID are: 1.       Single Responsibility Principle (SRP) 2.       Open-Closed Principle (OCP) 3.       Liskov Substitution Principle (LSP) 4.       Interface Segregation Principle (ISP) 5. ...
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