C & Observability Deep Dive

Question

A systems chat and C knowledge check: discuss how you'd instrument a high-throughput proxy for observability and debug a latency regression.

What this round covers

• C fundamentals (memory, pointers, undefined behavior)
• Metrics/tracing/logging at the edge (RED/USE)
• Debugging tail-latency regressions
• Testing strategy for systems code

Tips

Show depth close to the stack and a pragmatic approach to observability.