1Z0-997-26 High Availability And Disaster Recovery Practice Question
An architect is configuring Oracle Autonomous Database Disaster Recovery with cross-region Data Guard. The primary database is in Ashburn, and the standby is in Phoenix. You execute a switchover operation. What happens to the connection strings (such as tnsnames.ora entries) used by client applications?
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
✓
Client connection strings remain valid; applications reconnect, and the regional endpoint automatically routes traffic to the new primary.
Autonomous Database uses regional service names and client credential wallets (tnsnames.ora) that automatically update or resolve to the active primary region during a switchover/failover, though client reconnection is required.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The database IP addresses change, requiring manual DNS A-record updates in OCI DNS.
Why it's wrong here
Autonomous Database is a managed service; IP address management and routing are handled automatically by Oracle.
- ✓
Client connection strings remain valid; applications reconnect, and the regional endpoint automatically routes traffic to the new primary.
Why this is correct
Autonomous Database handles DNS and service routing so that connection strings transparently target the newly promoted primary database.
- ✗
You must manually regenerate new wallet zip files and redeploy them to all application servers.
Why it's wrong here
Wallet files do not need to be regenerated during a standard switchover; the existing wallets continue to work.
- ✗
Client applications must be rewritten to use hardcoded IP addresses instead of TNS names.
Why it's wrong here
Hardcoding IP addresses is an anti-pattern and unnecessary for Autonomous Database.
Visual reference
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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
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