ISTQB Certified Tester: Performance Testing Practice Mode

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• Chose C0

  - Modern services usually express tail-latency SLOs as p95 or p99 (or even p99.9 for very latency-sensitive services). p50 (median) and mean hide the tail. p25 is rarely used. The choice depends on user-impact tolerance — every 1-in-100 slow request affects 1% of users.