AreaCode quality
Observability
Phase 1 (junior, mid)• How would you test an elevator?
•
What types of tests do you know? Which did you write?
•
How would you prepare user accounts in DB for integration tests?
•
How can you automatically measure how good your code is?
◦
LOC, cyclomatic complexity, number of defects
•
What code coverage is acceptable?
•
How would you test that on deal creation API endpoint for authenticated user, a webhook call is made?
Phase 2 (mid, senior)• How can you find slowest part of the app?
•
How do you find bug cause if multiple services in production are involved?
•
How do you debug a running service?
•
What is spy, stub, mock?
•
Where is typescript useful?
•
give an example for service level objective
Phase 3 (senior+)• Whats the difference between average, median, p95, percentile?
• How does
distributed tracing work?
• How does
debugger work?
• What should you look at while
performance-profiling a process?
• What
metrics should you monitor?
◦ health, errors, resource consumption, requests, product metrics
- prometheus data types