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Java Challenge Europe

We are inviting all the Java Lovers, students & professionals, to participate in the first JAVA Challenge of EUROPE. 

Members of the jury & Generous Contributors of this challenge:

Andres Almiray
Developer Advocate at Gradle Inc.
Thodoris Bais
Scrum Master at ABN AMRO Bank N.V.
Rabih Bashroush
Patrick Baumgartner
Co-organizer at Voxxed Days Zürich, Lecturer at ZHAW Zurich University of Applied Sciences & Software Crafter at 42talents GmbH
Dominik Berger
Member of The Board at JUG CH, Co-organizer Java Basel & Software Architect at bluesky IT-Solutions AG
Pierre Bettens
IT Teacher - Maitre-Assistant at ESI
Marcus Biel
Java Evangelist & Founder at Clean Code Academy
Sam Brannen
Principal Software Engineer at Pivotal Software, Inc.
Dennis Breuker
Lecturer & College professor at Amsterdam University of Applied Sciences & at Amsterdam University College
Philippe Charrière
CSO & Tech evangelist at Clever Cloud
Claude Chaudet
Associate Professor & Head of the Computer Science Department at Webster University Geneva
Jaap Coomans
Software Architect and Java Specialist at Jstack
Thomas Darimont
Fellow at codecentric AG
Sebastian Daschner
Java Champion & Lead Java Developer Advocate at IBM
Vladimir Dejanovic
Founder & Chairman of Amsterdam Java User Group - IT Manager / Chapter Lead at ING
Xavier Detant
Craftsman / CTO at Zenika
Gilles Di Guglielmo
Software Architect, Founder team member at Les Furets
Marcus Fihlon
Member of The Board at JUG CH, Speaker, Lecturer at TEKO Swiss Technical College & Agile Coach at CSS Versicherung
María José Gómez Mora
Olivier Hubaut
Board Member & JUG Leader at Brussels Java User Group & Founder at T.M.P. Solution
Bert Jan Schrijver
Co-founder & CTO at OpenValue
Johan Janssen
Trainer and software Architect at Info Support
Philippe Kernevez
Co-Organizer JUG Lausanne & Directeur Technique at OCTO Technology
Nico Kuijpers
Lecturer ICT Software Engineering at Fontys
Daniel Lebrero
Devoxx Speaker & Senior Platforms Engineer at Akvo
Bruno Lehouque
Community Teacher Assistant at Princeton University
Thierry Leriche-Dessirier
Architecte, Développeur full stack, Rédacteur pour, Concepteur & Professeur de Génie Logiciel at Société Générale
Ralf Lämmel
Arnaud Martin
Simon Martinelli
Member of The Board at JUG CH, Lecturer at Berne University of Applied Science & Managing Director at 72 Services
Julia Mateo
Speaker, Leading Duchess Swiss & Software engineer at Lombard odier
Carlos Matos
Grzegorz Mirek
Full Stack Developer at OEConnection (OEC)
Bernd Müller
Co-organizer JUG Ostfalen & Professor for Computer Science at Ostfalia University of Applied Sciences
Oliver Nautsch
President of The Board at JUG CH & Founder / Software Crafter at Nautsch GmbH
Martin Alexander Neumann
Auditor for IT security at Deutsche Bundesbank
Miguel Ángel Pastor Olivar
Senior Engineer at Instana & Guest Lecturer at Universidad Pontificia de Salamanca
Raquel Pau
Speaker & Software Engineer at Schibsted Media Group
José Paumard
Maître de Conférences at Université Paris 13
Grzegorz Piwowarek
Lead Software Engineer at Casumo
Arend Rensink
Full Professor in Software Modelling, Transformation and Verification at University of Twente
Stéphane Rondal
Founder Wajug & Founder, Managing Partner at Arexo
Philippe Roose
Head of Computer Science Department & LIUPPA/T2I Research Team at IUT de Bayonne et du Pays basque
Jamila Sam
Co-author of introductory MOOCs on Java, Senior Researcher & Teacher Associate at EPFL - École Polytechnique Fédérale de Lausanne
Lionel Seinturier
Professeur des Universités at Université Lille
Gregory Seront
IT Professor at Institut Paul Lambin
Marcin Szymaniuk
Data Engineer at TantusData
Mario Torre
Java Champion & Principal Software Engineer, Java Platform at Red Hat
Anatole Tresch
Star Spec Lead, Speaker, Author, Blogger & Principal Consultant at Trivadis AG
Antoine Vacavant
Associate Professor at IUT du Puy-en-Velay
Ana Lucia Varbanescu
Assistant Professor at University of Amsterdam
Johan Vos
Java Champion, Member of the BeJUG & Devoxx steering group & Co-Founder, CTO at Gluon
Geertjan Wielenga
Senior Principal Product Manager at Oracle
Jeroen Willemsen
Principal Security Architect at Xebia
Hélène de Ribaupierre
Lecturer Computer Science and Informatics at Cardiff University
Regina ten Bruggencate
Senior Java Developer at Finalist
Terms and Conditions: 

About the online phase:

You will have 15 minutes to give the correct answer to as many questions as you can (up to 20). The questions are multiple-choice with one or several good answers.

The quiz allows the usage of three ‘jokers’: the "50/50", forcing the on-line test to take out half of the answers, the "Ask the challengers", whereby the percentage of the challengers choosing each answer is displayed to you and the "Ask a friend", in which the challenger sends a bonus question to one friend during the challenge, after which the friend provides input and the score is adapted accordingly.

What will be displayed at the end of the challenge?

Your score and the private leaderboard will be released at the end of the challenge and only visible to you. We are showing the detail of scores to all players at the end of the Challenge, so that the questions can't be shared among players during the Challenge.

The Name & First name of the best 10% will be published. All the other participants will have the opportunity to see their ranking and score in their private leaderboard. They will not see the ranking and scores of the other participants.

Rules of the Challenge

Participants must be EU residents to be invited to participate to the finals.

One registration per person is authorized. The participant can only compete in his own name and not for someone else. Personal information of the participant may be checked through different sources. Personal information must be accurate. Inaccurate or false information given by the participant will invalid the registration or entail the loss of the Prize.

The level of the questions and related scoring:

The on-line test contains questions with 3 levels of difficulty: Low, Medium and High with an associated score 1, 2 or 3 points, if answered correctly. The total score will be the cumulative score of the questions. A wrong answer always gives the same score (-1). When you pass on a question, you don’t win or lose points. The repartition of the level of the questions is the same for every participant. Participants can answer to a maximum of 20 questions in 15 minutes. Timing plays a role when participants have the same score.

Data privacy & Information Sharing

The Challenge runs on a secure platform managed by EDITx. Participant's personal data will be collected by EDITx for the following purposes:

  • To monitor the correct competition process
  • To analyze and optimize EDITx
  • To set up the Statboard & Leaderboard at the end of the challenge
  • To invite the Top Participants to the final
  • To keep the participants updated with the results of the challenge and the Quizzes

EDITx shares the personal information (last name, first name, mobile and email) of the participants with & only with the sponsor, the members of the jury any governmental agency or Authority in Europe or authority at their request (in case of irregularities).

Personal information, scores, questions, results are never given, sold or exchange to any other party.


Any of the following reasons will justify a disqualification even if we feel sorry for that.

  • Communicating and/or publishing any kind of data, questions or solutions in liaison with the challenge, and sharing directly or indirectly this information with any other contestant before the challenge has been closed;
  • Attempting to damage the website or taking action that may have a negative impact on the normal process/operating procedure of the challenge. Incidentally this may also be considered as a legal violation and the Organizer reserves the right to initiate a legal procedure and claim damages before the Court.
  • Taking any action in violation of the copyrights/IP that belong to the Authors of the questions & EDITx Community.
  • Having multiple profiles while participating to the challenge.

EDITx Regulation and general conditions

Cookies, intellectual property, data privacy, responsibility, applicable law and court jurisdiction: for more information, see Challenge terms, Terms of Use and Privacy Policy.

From 05/10/2020 to 27/11/2020

Challenge closed !

Time to complete:
Maximum 900 seconds
Number of questions:
Bonus available:
  • 50-50
  • Ask the challengers
  • Ask a friend
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
6 + 8 =