ISTQB Foundation (CTFL v4.0) Mock Exam #10

The tenth full-length CTFL v4.0 practice exam: 40 questions, 60 minutes, 65% to pass, weighted across all six chapters. Applied block: an 8-rule streaming-subscription table read twice — once for a device-limit denial, once for merging rules where invalid payment always denies — plus a valid Idle-to-Idle path through an ATM session state machine. Theory focus: the rising cost of defects by phase and shift-left economics, two-value vs three-value boundary value analysis, staffing and people project risks, and traceability tooling across requirements, tests and defects. Every answer option carries a written rationale.