Codebase navigation
Find entry points and understand how modules connect.
Explore practiceREPOSITORY CODING
A real codebase.
A meaningful change.
Practice the engineering that happens after the blank editor. Navigate existing files, reproduce a bug, make a focused change, and verify it with tests.
Your learning. Your pace. A clearer next step.
YOUR PRACTICE PATH
- 01Explore before changingRead the requirements and follow the relevant execution path.
- 02Make a focused patchUse the editor and terminal to implement the smallest complete solution.
- 03Verify the behaviorRun tests, investigate failures, and explain why your change works.
BUILD YOUR FOUNDATIONS
Know the ideas.
Put them to work.
Explore the concepts behind repository coding, then apply them in the practice library.
Bug reproduction
Read the task, reproduce the issue, and narrow the cause.
Explore practiceAPI contracts
Work through request handling, validation, and response behavior.
Explore practiceData & state
Inspect persistence and the assumptions behind state changes.
Explore practiceTesting
Run the available tests and check the cases your change affects.
Explore practiceInterview practice
Explain your reasoning while working in a repository workspace.
Explore practiceA MORE THOUGHTFUL SESSION
Make every attempt
teach you something.
Practice is most useful when you can explain what changed in your understanding. Build that habit into every session.
Choose your next challenge01 / Explore before changing
Read the requirements and follow the relevant execution path.
02 / Make a focused patch
Use the editor and terminal to implement the smallest complete solution.
03 / Verify the behavior
Run tests, investigate failures, and explain why your change works.
KEEP EXPLORING