Frequently Asked Questions
Everything you need to know about CodeDuel — the technical and behavioural assessment platform.
The Platform & Our Approach
What exactly is CodeDuel?
CodeDuel is a Talent Lifecycle Management platform — it supports every stage of your employees' journey, from recruitment to certification. In practice, it enables you to: (1) objectively assess technical skills through AI-graded Quizzes (MCQs) and Code Challenges, (2) evaluate behavioural skills through Soft Skills Assessments (SJT method), (3) precisely detect skill gaps and recommend targeted training, (4) offer structured learning paths (CodePath) with a certification at the end, (5) support HR decisions — recruitment, promotion, internal mobility — with objective, reproducible data.
How does access to the platform work?
Access is built around a credit system:
- At sign-up: Every new user gets a single free trial: a 5-question quiz, with the score at the end. Full assessments and their answers are unlocked with credits.
- For companies and recruiters: Credit packs are available to create assessment campaigns, access detailed AI reports, and manage applications at scale.
- Special allocations: Additional credits can be granted for client proof-of-concept tests, white-label pilots, or as part of social initiatives supporting students and people from disadvantaged backgrounds.
For Companies & Decision-Makers
Why assess my internal teams?
Internal assessment is not about penalising — it's about driving performance. It helps you detect the precise "Knowledge Gap" within your teams.
No more long, generic, costly training sessions. Target only the missing modules for immediate time and budget savings.
Base salary negotiations and promotions on objective, factual data — reducing cognitive bias.
How do I recruit with CodeDuel?
The principle is simple: no CV without technical proof. For each job offer, you can link up to 3 quizzes and 3 case studies. Candidates apply by demonstrating their value across these assessments. You then receive an AI-generated decision-support report to filter the best profiles before the first interview. You can also add Soft Skills Assessments to your job offers — to evaluate candidates' behavioural competencies in the same application flow.
How do I create and manage a B2B assessment campaign?
A B2B campaign lets you organise a collective assessment of your candidates or employees in minutes. From your company dashboard: (1) Create the campaign by selecting your assessments — Quizzes, Code Challenges, Soft Skills Assessments, or any combination. (2) Share a unique invitation link with your participants — no premium account required. (3) No credits deducted from candidates: your company pack covers all costs. (4) Monitor results in real time from your dashboard: scores, rankings, individual AI reports. Result: a complete comparison of all your participants, ready before the first interview.
Technical Assessments
How are case studies graded?
Every answer is reviewed by AI, well beyond a simple right or wrong. Depending on the case study (project management, analysis, configuration or code), CodeDuel assesses the relevance of the approach, the quality of the solution, the risks and compliance with the domain's best practices. When a case requires code, the review also covers structure, security and performance. The result is a reasoned opinion you can read, understand and apply immediately.
How is score reliability guaranteed? (Anti-Cheat)
Our algorithms ensure assessment integrity on several levels. (1) Dynamic random selection: each session draws different questions from large banks, making rote memorisation impossible. (2) Behavioural monitoring: advanced systems analyse behaviour during assessments — tab switches, atypical response speeds, suspicious patterns. (3) Time windows: each question has a calibrated time limit to prevent external lookups. (4) Variant rotation: for case studies, multiple versions of the same problem circulate simultaneously. Every score reflects genuine competency.
What languages and technologies are covered?
CodeDuel covers hundreds of domains: programming languages (Python, JavaScript/TypeScript, Java, C, C++, Go, Rust, PHP, SQL, R...), frameworks and ecosystems (React, Node.js, Django, Spring Boot, .NET, Vue, Angular...), cross-cutting domains (Cybersecurity, Cloud AWS/Azure/GCP, DevOps, Data Science, Machine Learning, Agility, Project Management, System Architecture...) and preparation for official certifications (AWS SAA, Azure AZ-900, Google Cloud, PMP, Scrum Master, Cisco, CompTIA, ISTQB...). Our catalogue — one of the most comprehensive on the market — grows continuously. A technology missing? We can develop it on demand for your organisation.
Soft Skills Assessments
What are Soft Skills Assessments?
Soft Skills Assessments evaluate your behavioural and interpersonal competencies — the ones that make a real difference in professional life but that technical tests cannot measure. CodeDuel offers 13 behavioural families and 52 competencies: Communication, Collaboration, Problem Solving, Adaptability, Leadership, Emotional Intelligence, Professional Ethics, Results Orientation, Customer Orientation, Team Management, Organization and Personal Effectiveness, Negotiation, and Intercultural and Remote Work. Each assessment uses realistic situational scenarios (SJT — Situational Judgment Test), prioritisation questions, and weighted true/false items to evaluate your actual behaviours without obvious right or wrong answers. At the end, you receive a detailed AI-generated behavioural report: a narrative profile summary, key strengths, development areas, and personalised recommendations. For companies, these assessments integrate seamlessly into existing campaigns for a holistic view — technical AND behavioural skills in the same campaign.
Are Soft Skills results truly objective?
Yes, and that is the strength of our approach. Soft Skills Assessments are based on the SJT (Situational Judgment Test) methodology, validated by decades of organisational psychology research. Two principles guarantee objectivity: (1) No obvious right answer — scenarios are weighted according to established behavioural models, impossible to memorise or guess. (2) 100% automated scoring by our AI engine, eliminating any human bias. The behavioural report is standardised: two candidates with identical behaviours receive the same profile. Unlike a classic interview, our scores are reproducible, comparable across candidates, and unaffected by charm or appearance.
CodePath & Certifications
What is a CodePath?
A CodePath is a structured learning path, built entirely from our real assessment bank — not from a theoretical syllabus. Each CodePath targets a specific technical domain: Full Stack Web, Cybersecurity, Artificial Intelligence, Agility, Cloud, Data Science, and more. The principle: you progress module by module, each module being a series of targeted assessments (Quizzes + Code Challenges). Unlike a conventional course, you learn by doing — with immediate AI feedback after each assessment. CodePaths are available in free mode (at your own pace) and can be integrated by companies into their internal upskilling programmes, with progress tracking for each employee.
How do I earn a CodeDuel certification?
A CodeDuel certification is earned by completing an entire CodePath and exceeding the overall passing threshold defined for that path. This threshold is calculated across all assessments — not just a single final exam. Once earned, the certification: (1) appears on your public CodeDuel profile and can be shared with any recruiter, (2) is verifiable online — not just a PDF, (3) can be linked to your LinkedIn profile as external validation. For companies: you can integrate a CodePath into your internal campaigns to officially certify your employees on the skills that are strategic to your organisation — concrete recognition of their progress.
Credits, Access & Data
How does the credit system work?
Credits are the access currency for assessments on CodeDuel. Each assessment type has a defined cost: Quizzes cost 1 credit per session, Soft Skills Assessments cost 3 credits (due to the AI behavioural report generated), and Code Challenges vary by type. Upon registration, you get a single free trial: a 5-question quiz, with the score only and no answers. No credits are offered. Additional credits are available through individual packs or company subscriptions. Important: in a B2B assessment context (a campaign launched by a company), the candidate spends no credits — the sponsoring organisation covers the cost. Credits are non-refundable and have a limited validity period.
Why don't you give credits on sign-up any more?
We saw waves of sign-ups, often with disposable email addresses, whose only goal was to copy our question banks. These banks represent hundreds of hours of work. So we stopped giving credits: only a new account that has never had a credit gets a single free trial of 5 questions, with the score at the end.
Are you a student or changing careers, preparing for a certification, and the cost is a real obstacle? Write to us explaining your situation and your goal, with proof (student card, exam registration, etc.). We review each request case by case.
How is my data protected? (GDPR)
Security is built into CodeDuel from the ground up. Your personal data and assessment results are protected to the highest standards. For candidates: your results are only shared with a recruiter when you explicitly apply for a job offer. For Soft Skills Assessments: in a B2B context, behavioural data is shared only with the sponsoring company, which acts as joint data controller and commits not to transfer it to third parties. You retain your GDPR rights at all times: access, rectification, deletion, and portability of your data. Privacy Policy.