Industry questions.

Multi-tenant isolation, subscription billing, and feature-flag / RBAC discipline — the questions that separate generic QA from real SaaS testing.

Checkout pipelines, inventory concurrency, and promotion logic — testing where money, real-time stock, and discounts collide.

Ledger correctness, idempotency, and regulatory hard-fails — testing where money must be exactly right, immutable, and auditable.

Patient-safety-critical testing: PHI privacy, consent lifecycle, cross-patient isolation, and legally-mandated audit trails.

Availability against external supplier systems, timezone and itinerary correctness, and booking sagas that span third parties.

Two-sided trust, split payments and payouts, and seller fraud — testing where buyer, seller, and platform interests intersect.

Minor-data protection, roster and grade integrity, and assessment integrity — testing software where the users are often children.

Non-determinism, safety guardrails, and model drift — testing products where there's no single correct output and the model changes under you.

Server-authoritative trust, provably-fair RNG, anti-cheat, and gambling regulation — testing where fairness must be provable and compliance gates must fail closed.

Firmware OTA, device-cloud state convergence, offline reconciliation, and fleet-scale telemetry — testing where the physical world is the ground truth and a bad release can be physically unreachable.

DRM license lifecycle, adaptive bitrate quality contracts, concurrent-stream enforcement, cross-device resume, and live pipeline testing — where a silent EME error or a misconfigured ABR hysteresis is the failure mode, not a crash.