Programming Practice
T
Tracing, Debugging and Handling Strings and Files
Push a bit harder. Apply what you know to less familiar problems.
Computer Science · Medium
5
questions · ~4 min · 3 hints each (−5 pts)
Confidence tracking, 3-tier hints and instant feedback.
What you'll learn
Each question helps you build key knowledge and skills.
- 1When tracing programs with loops, update a trace table on every pass through the loop, including the loop counter and any variables that change.
- 2String handling involves methods such as slicing, concatenation, upper(), lower(), len() and find() to manipulate text stored in a program.
- 3File handling in Python typically uses open(), read(), write() and close(), and files should always be closed after use to avoid data loss.
- 4Good testing uses normal, boundary and erroneous data to check a program works correctly and rejects invalid input using validation checks like range checks and presence checks.
Question mix
A mix of question types to build your skills.
- Short answer×3
- Multiple choice×2
Different question types help you think in different ways.
How it works
A simple 3-step process
- 1
Rate your confidence
Tell us how sure you feel before answering. It helps us understand your starting point.
- 2
Use hints if stuck
Get up to 3 helpful hints per question. Each hint costs 5 Treasure Points.
- 3
See what went wrong
Get instant feedback with clear explanations, so you can learn and improve.
Ready when you are
This takes about 4 minutes.