ISTQB Specialist (CT-PT) Examen de práctica #3

A full-length ISTQB Certified Tester Performance Testing (CT-PT) mock exam: 40 questions, 90 minutes, 26 correct answers (65%) to pass. Every question is worth one point, exactly as in the real exam. The chapter split reproduces the official ISTQB Exam Structure Table to the question — 6 on basic concepts, 4 on performance measurement fundamentals, 7 on performance testing in the software lifecycle, 20 on performance testing tasks and 3 on tools — and so does the cognitive-level budget of K1 2, K2 25, K3 4, K4 9. Scenarios are drawn from online game matchmaking, food-delivery dispatch, a market-data feed, ride-hailing, national eID, live sports streaming, document rendering, ERP month-end close and a messaging platform. The four K3 items are calculations: concurrency in an open system from arrival rate and service time, extrapolation from a scaled-down test environment, network throughput in bits per second, and the gap between required and achieved business throughput. Two questions are built on annotated metric graphs — garbage-collection pauses behind response-time spikes, and an unbalanced application server cluster hidden by aggregated results. Every option, correct and incorrect, carries its own rationale.