OCI 1Z0-997-25 Sample Questions with Explanations

These original sample questions are designed to help you check how the exam topics appear in decision-style prompts. They are not taken from the live exam.

Use these sample questions as a guided self-assessment for OCI Architect Professional (1Z0-997-25) topics such as high availability, disaster recovery, network topology, automation, blast-radius reduction, data protection, observability, and migration trade-offs. The prompts focus on professional-level architecture decisions where the safest answer is rarely the biggest service name.

Where these questions fit in the 1Z0-997-25 guide

The sample set below is part of the Oracle OCI 1Z0-997-25 guide path:

• Oracle certification hub
• OCI guides
• 1Z0-997-25 exam guide
• 1Z0-997-25 cheat sheet
• 1Z0-997-25 study plan
• 1Z0-997-25 FAQ
• 1Z0-997-25 resources
• 1Z0-997-25 glossary

1Z0-997-25 OCI Architect Professional sample questions

Work through each prompt before opening the explanation. Professional architecture questions reward trade-off discipline: isolate failure domains, automate repeatability, validate recovery, and avoid designs that make every failure global.

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Question 1

Topic: Reducing blast radius

A company runs several business-critical applications in one OCI tenancy. A single administrator mistake should not be able to modify every production workload at once. Which design is strongest?

• A. Put every resource in the root compartment because it is easier to find.
• B. Use one shared administrator group for every team and rely on naming conventions.
• C. Separate workloads into compartments aligned to ownership and risk, apply least-privilege policies, and use governance controls to detect or prevent drift.
• D. Disable audit logging so accidental changes do not create noise.

Best answer: C

Explanation: Blast-radius reduction requires boundaries and scoped authority. Compartments, least-privilege policies, and governance controls limit what one mistake can affect and make risky changes easier to detect.

Why the other choices are weaker:

• A centralizes exposure.
• B grants broad authority and relies on human convention.
• D removes evidence instead of reducing risk.

What this tests: Compartment strategy, IAM boundaries, governance, and operational blast-radius control.

Related topics: Compartments; IAM; Governance; Audit; Blast radius

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Question 2

Topic: Disaster recovery validation

A workload has a documented cross-region disaster recovery plan. Leadership asks whether the plan can actually meet the stated recovery time and data-loss targets. What is the best next step?

• A. Assume the plan works because it is documented.
• B. Delete the primary environment without warning to create a realistic emergency.
• C. Move all resources to one region so the architecture is simpler.
• D. Run planned DR exercises that test failover, data recovery, runbooks, permissions, monitoring, and fallback against the recovery objectives.

Best answer: D

Explanation: DR readiness must be tested. A planned exercise validates technical replication, operational steps, access, monitoring, communication, and whether the measured recovery time and data loss match the target objectives.

Why the other choices are weaker:

• A treats documentation as evidence.
• B creates unmanaged business risk.
• C removes regional resilience rather than validating it.

What this tests: Recovery objectives, DR testing, runbooks, operational validation, and resilience governance.

Related topics: Disaster recovery; RTO; RPO; Runbooks; Failover testing

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Question 3

Topic: Hub-and-spoke network design

Several VCNs need controlled connectivity to shared inspection services and to on-premises networks. Teams also need segmentation so not every VCN can reach every other VCN. Which design is strongest?

• A. Create a full mesh of ad hoc peerings and let each team update routes independently.
• B. Use public IP addresses between private workloads because routing is simpler.
• C. Put every workload in one large subnet and separate applications by hostnames.
• D. Use a centralized routing design with appropriate gateways, route tables, security controls, and inspection points to govern allowed paths.

Best answer: D

Explanation: A professional multi-VCN design needs controlled routing and segmentation. Centralized routing with explicit route tables, gateways, and inspection points is stronger than unmanaged peerings or public exposure between private workloads.

Why the other choices are weaker:

• A becomes hard to govern and audit at scale.
• B increases exposure and bypasses private network design.
• C collapses segmentation and creates a large blast radius.

What this tests: Multi-VCN routing, network segmentation, inspection, and scalable architecture patterns.

Related topics: VCN; Routing; DRG; Inspection; Hub-and-spoke

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Question 4

Topic: Infrastructure repeatability

A production environment is rebuilt manually during each release. Configurations drift between environments, and rollback is slow. Which improvement best supports repeatable architecture?

• A. Keep manual steps but ask engineers to type faster during incidents.
• B. Use infrastructure as code, version-controlled templates, reviewed changes, and automated deployment or rollback procedures.
• C. Store screenshots of console pages after every release.
• D. Give every engineer administrator access so anyone can fix drift immediately.

Best answer: B

Explanation: Repeatability comes from versioned, reviewed, automated infrastructure definitions and procedures. This reduces drift, makes change history visible, and supports controlled rollback.

Why the other choices are weaker:

• A leaves the failure-prone manual process in place.
• C documents state but cannot reliably recreate it.
• D increases privilege risk and does not prevent drift.

What this tests: Infrastructure as code, change control, rollback, drift reduction, and operational maturity.

Related topics: IaC; Automation; Version control; Rollback; Configuration drift

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