AZ400-Q: use deployment rings safely
A desktop application must reach internal users first, then a small external cohort, then all users. Each stage should halt automatically if error rate rises. What strategy fits?
- A) Deploy to everyone at the same time.
- B) Use deployment rings with explicit promotion criteria based on telemetry and a stop/rollback rule. ✓
- C) Use one long-running build agent.
- D) Delete old releases before testing the new one.
Answer: B. Rings progressively expose a release to defined cohorts and use evidence to decide promotion.
Why not the others: Simultaneous release maximizes blast radius. Agent duration and deletion do not govern user exposure.