1Z0-997-26 High Availability And Disaster Recovery Practice Question
When designing high availability for an Oracle RAC (Real Application Clusters) database deployed on OCI Exadata Database Service, which THREE architectural characteristics ensure fault tolerance and uptime? (Choose three.)
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
✓
Multi-node database clustering across distinct Fault Domains or Availability Domains
RAC on Exadata leverages multiple database nodes across fault domains, transparent application failover (TAF/Application Continuity), and shared storage across redundant storage cells.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Running the entire cluster on a single Oracle Linux compute instance without Grid Infrastructure
Why it's wrong here
Single-instance setups are not RAC and lack cluster-level high availability.
- ✗
Storing all database data on a single local NVMe drive on node 1
Why it's wrong here
Local NVMe drives are non-shared and ephemeral; RAC requires shared storage across nodes.
- ✓
Multi-node database clustering across distinct Fault Domains or Availability Domains
Why this is correct
RAC nodes are distributed across fault domains to survive individual node or hardware failures.
- ✓
Application Continuity or Transparent Application Failover (TAF) for seamless session recovery
Why this is correct
Application Continuity replays transient failures so application sessions survive node outages.
- ✓
Redundant Exadata Storage Servers (Storage Cells) providing clustered grid storage
Why this is correct
Exadata storage cells use mirroring and grid disk redundancy to survive storage hardware failures.
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Last reviewed August 2026 · checked against the official Oracle exam blueprint
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