Challenges
Master AI-assisted coding through hands-on practice
33 challenges
6 categories
Fix the Null Reference Bug
Bug FixEasy
A REST API endpoint is crashing with a null reference error. Find and fix the bug that occurs when optional user data is missing.
15m
1.0x XP
1 completed
Build a Todo API
BuildEasy
Create a simple REST API for managing todos. Implement CRUD operations with the provided Express app skeleton.
20m
1.0x XP
0 completed
The Shopping Cart Mystery
Bug FixEasy
Customers are complaining about wrong totals in their shopping carts! Some orders show $NaN, others have incorrect amounts. Can you find the bugs before Black Friday?
1.0x XP
0 completed