1Z0-997-26 Workload Migration Practice Question
You are planning the final cutover for a critical production database migrating from an on-premises Oracle Real Application Clusters (RAC) database to OCI Base Database Service using Oracle Data Guard for replication. To minimize application downtime during the cutover window, which sequence of steps must be executed?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ensure zero data lag on the Data Guard standby, perform a switchover/failover to promote the OCI standby database to primary, and update application connection strings to point to the new OCI primary listener.
To achieve minimal downtime with Data Guard, you instantiate the standby, let it catch up, perform a final log switch, apply all remaining redo, transition the role to primary, and then redirect application connection strings.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Stop source application, shut down source database immediately, open standby database in read-write mode, and update DNS.
Why it's wrong here
Shutting down the source database before ensuring all redo has been applied to the standby risks data loss.
- ✗
Delete the source database home, re-run ZDM pre-migration checks, and deploy a fresh Autonomous Database instance.
Why it's wrong here
Deleting the source database home prematurely causes an outage and does not utilize the pre-configured Data Guard standby.
- ✗
Take an offline Data Pump export on premises, ship the dump via FastConnect, import it into OCI, and keep the source running indefinitely.
Why it's wrong here
This describes a staged batch migration with ongoing dual-writes, not a streamlined Data Guard cutover strategy.
- ✓
Ensure zero data lag on the Data Guard standby, perform a switchover/failover to promote the OCI standby database to primary, and update application connection strings to point to the new OCI primary listener.
Why this is correct
This ensures all transactions are synchronized, eliminates data loss, and cleanly promotes the cloud database with minimal cutover time.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Oracle exam blueprint
This 1Z0-997-26 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-997-26 exam.