Don’t tell us your level. Show us.

Five real problems for the role you want, graded on our servers against tests you can’t see. At the end you get a measured starting point — what you already have, what you’re missing, and which sessions you can skip.

• Gets harder when you pass, easier when you don’t.
• No hints. This is a measurement, not a lesson.
• Skip anything you don’t know. That’s a real answer too.