1Z0-997-25 is a high-level architecture and tradeoff exam. Strong answers usually come from separating placement, network design, resilience, and automation concerns instead of treating a large OCI service as the answer to every scenario.
Blast radius: The scope of systems or data affected when one design choice, misconfiguration, or failure goes wrong.
Recovery objective: The architectural target for how quickly service must return and how much data loss is acceptable.
What this guide emphasizes
advanced OCI network, IAM, and architecture tradeoffs
HA, DR, and recovery planning for larger workloads
service-selection judgment across compute, storage, and infrastructure automation
common professional-level traps around overscoping, overexposure, and weak recovery design
What strong answers usually do
classify the problem first as placement, network, resilience, or automation
choose the simplest architecture that still reduces blast radius and supports recovery
separate operational control from pure infrastructure capability
prefer answers that preserve observability, repeatability, and clear failure handling