1Z0-997-26 Workload Migration Practice Question
During a migration cutover weekend, your team encounters unexpected DNS resolution failures preventing users from reaching the newly migrated OCI application endpoints. Which TWO immediate troubleshooting steps should you perform? (Choose two.)
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
✓
Check OCI VCN DNS resolver settings and custom resolver forwarders if integrating with on-premises DNS.
Troubleshooting DNS issues during cutover involves checking DNS record propagation, TTL values, and OCI VCN DNS resolver configuration or Load Balancer listener endpoints.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Check OCI VCN DNS resolver settings and custom resolver forwarders if integrating with on-premises DNS.
Why this is correct
VCN resolver configuration ensures internal and hybrid DNS queries route correctly to private endpoints.
- ✓
Verify that public DNS records (A and CNAME) have been updated with the correct OCI Load Balancer IP addresses and check TTL settings.
Why this is correct
Checking DNS records and TTL ensures clients are querying the updated OCI endpoint rather than cached old IPs.
- ✗
Change the tenant subscription currency from USD to EUR.
Why it's wrong here
Billing currency settings do not affect DNS record resolution.
- ✗
Reformat all backend database tables using SQL*Plus.
Why it's wrong here
Reformatting database tables has no relation to solving DNS resolution failures.
- ✗
Delete all OCI compartments and recreate the tenancy root structure.
Why it's wrong here
Deleting compartments causes catastrophic data loss and does not troubleshoot DNS.
Visual reference
About these practice questions
This 1Z0-997-26 question is part of Courseiva's 348-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.