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Certification exam

Certified in Kotlin.

Already know Kotlin? Skip the course. Pass the exam and get a verified W3Schools certificate the same day.

$953 attempts, certificate and the full Kotlin course included

All exams · $399

Prefer to start with the lessons? Learn Kotlin · $95

14-day money-back guarantee  ·  Instant access  ·  Take it when you're ready

  • OnlineFrom anywhere, any time
  • 3 attemptsIncluded in the price
  • Course includedBrush up before you take it
  • ForeverCertificates never expire

How it works

Buy it. Take it. Share it.

No scheduling, no proctor, no waiting for results.

  1. Buy the exam

    Instant access in your W3Schools account. No scheduling.

  2. Take it when you're ready

    Online, multiple choice. Three attempts included.

  3. Get certified

    Pass and your certificate is issued the same day.

What the exam tests

The Kotlin skills you need to pass.

Multiple choice questions across the whole of Kotlin, from the basics to real-world use.

  • Learn what Kotlin is and set up your environment
  • Understand Kotlin syntax and basic concepts
  • Work with variables and data types
  • Use operators and control flow (if, when, while)
  • Create and use arrays and loops
  • Write functions in Kotlin
  • Learn object-oriented programming with classes
  • Work with constructors and inheritance
  • Create class functions and objects
Not sure you're ready?

The full Kotlin course, 24 modules, is included with the exam. Brush up first, then take it.

See the course · $95

Roles that ask for this

  • Kotlin Developer
  • Android Developer
  • Mobile App Developer
  • Back-End Developer
  • Software Engineer
  • Full Stack Developer
  • Java Developer
  • Cross-Platform Developer
  • API Developer
  • Game Developer
  • Technical Lead
  • Freelance App Developer

Levels

Your score sets your level.

Pass at any level and the certificate is yours. The level is printed on it.

  • 40%Intermediate

    You know the fundamentals and can use them in practice.

  • 75%Advanced

    You handle most real-world tasks without looking things up.

  • 90%Professional

    Expert level. The highest mark on a W3Schools certificate.

Your certificate

Become a Certified Kotlin Developer.

A credential from the site that has taught the web since 1999.

  1. Issued in your name

    With your level and the date you passed.

  2. Verifiable

    Employers check it in seconds by link or QR code.

  3. Yours forever

    No renewals, no expiry. Add it to LinkedIn and your CV.

Certified Kotlin Developer

Pricing

One exam, or all of them.

This exam

Kotlin exam

$95one-time

  • 3 attempts, instant results
  • Kotlin certificate
  • The full Kotlin course included
  • Lifetime access
14-day money-back guarantee, as long as no attempt is used.

Best value

Full Access

$399one-time

  • All 45+ courses
  • Every exam and certificate
  • W3Schools Hero for life
  • Lifetime access
Get Full Access 14-day money-back guarantee, as long as no attempt is used.

Questions? Answers.

How does the exam work?

It is online and multiple choice. You start it whenever you want from your W3Schools account. You get the result the moment you finish, and the certificate right after you pass.

What if I fail?

You have 3 attempts. Take your time between them and retry when you're ready.

Is there a time limit?

Each attempt has a time limit, but there is no deadline for starting it. Buy now, take it when you feel ready.

Does the certificate expire?

No. It never expires. It is issued in your name and employers can verify it with a unique link or QR code.

Do you have a money-back guarantee?

Yes. 14 days from purchase, as long as no exam attempt is used. Our refund policy.

Is the course included?

Yes. Buying the exam also gives you the full course, so you can brush up before you take it. And buying the course includes the exam. Same content, pick the page that fits you.