OCI 1Z0-1123-25 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 Migration Architect Associate (1Z0-1123-25) topics such as discovery, landing-zone readiness, hybrid connectivity, data movement, database migration, validation, cutover, rollback, and stabilization. The prompts focus on sequencing and risk control.

Where these questions fit in the 1Z0-1123-25 guide

The sample set below is part of the Oracle OCI 1Z0-1123-25 guide path:

• Oracle certification hub
• OCI guides
• 1Z0-1123-25 exam guide
• 1Z0-1123-25 cheat sheet
• 1Z0-1123-25 study plan
• 1Z0-1123-25 FAQ
• 1Z0-1123-25 resources
• 1Z0-1123-25 glossary

1Z0-1123-25 OCI Migration Architect sample questions

Work through each prompt before opening the explanation. Migration questions usually reward separating assessment, landing-zone preparation, transfer, validation, cutover, rollback, and stabilization.

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Question 1

Topic: Assessment before migration

A company wants to move a business application to OCI. The application depends on a database, DNS records, identity integration, nightly file transfers, and several third-party endpoints. What should happen before choosing the migration tool?

• A. Start copying virtual machines immediately because tool choice can be fixed later.
• B. Cut over DNS first so users begin testing the target environment.
• C. Map dependencies, data flows, performance baselines, recovery needs, owners, and validation criteria.
• D. Disable monitoring in the source environment to reduce noise.

Best answer: C

Explanation: Migration tool choice depends on workload shape, data size, dependencies, downtime tolerance, and validation needs. Assessment comes first so the migration path fits the actual system rather than a guessed happy path.

Why the other choices are weaker:

• A starts movement before understanding dependencies.
• B performs cutover before the target is ready.
• D removes evidence needed to baseline and validate the migration.

What this tests: Discovery, dependency mapping, baseline capture, and migration planning order.

Related topics: Assessment; Dependencies; Baselines; Migration planning; Validation

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Question 2

Topic: Connectivity for large migration

A migration requires predictable high-throughput private connectivity between an on-premises data center and OCI for weeks. The workload has strict transfer windows and low tolerance for internet variability. Which option is usually the strongest starting point?

• A. FastConnect or a similarly planned private connectivity design sized for the migration and operating model.
• B. A temporary public IP address on every database server.
• C. Manual file copying over home broadband.
• D. No connectivity plan because data movement tools create the network automatically.

Best answer: A

Explanation: A large, predictable, private migration path normally needs planned connectivity. FastConnect-style private connectivity is the stronger answer when throughput, reliability, and reduced public internet dependency matter.

Why the other choices are weaker:

• B exposes sensitive systems and does not create a managed migration path.
• C is operationally unrealistic for enterprise migration constraints.
• D confuses migration tooling with network design.

What this tests: Hybrid connectivity, throughput planning, private paths, and matching network design to migration constraints.

Related topics: FastConnect; VPN; DRG; Data transfer; Hybrid connectivity

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Question 3

Topic: Cutover validation

A database migration has completed its final sync. The team wants to switch production traffic to OCI. What should happen before cutover?

• A. Delete the source database so nobody accidentally uses it.
• B. Assume the sync succeeded because the transfer tool ended without an error.
• C. Disable application health checks until users report problems.
• D. Validate data consistency, application behavior, access paths, monitoring, rollback trigger, and business-owner acceptance.

Best answer: D

Explanation: A successful transfer is not the same as a safe production cutover. The team needs data checks, application smoke tests, access validation, monitoring, rollback criteria, and business signoff before switching traffic.

Why the other choices are weaker:

• A removes the rollback option too early.
• B treats tool completion as business validation.
• C removes visibility during the riskiest phase.

What this tests: Migration validation, cutover readiness, rollback planning, and operational controls.

Related topics: Cutover; Validation; Rollback; Data consistency; Smoke tests

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Question 4

Topic: Rollback planning

During a planned cutover, the application starts producing inconsistent results. The team has a limited outage window and needs to restore service safely. Which plan is strongest?

• A. Continue the cutover regardless because rollback looks bad.
• B. Use the predefined rollback trigger and procedure to return traffic or operations to the known-good source state, then preserve evidence and diagnose the issue.
• C. Ask each user to decide which environment to use.
• D. Delete monitoring alarms so the cutover can continue quietly.

Best answer: B

Explanation: A migration plan should define rollback triggers and steps before cutover. When a trigger is met, restoring known-good service and preserving evidence is safer than improvising under outage pressure.

Why the other choices are weaker:

• A ignores the business risk.
• C creates inconsistent state and support confusion.
• D hides the failure instead of controlling it.

What this tests: Rollback triggers, cutover control, evidence preservation, and migration incident handling.

Related topics: Rollback; Cutover; Runbooks; Stabilization; Incident response

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