1Z0-997-26 High Availability And Disaster Recovery Practice Test 2 — 15 Questions

Question 1

You are configuring a Data Guard association between two Oracle Base Database Systems in different OCI regions. The primary database encounters an unplanned outage, and you perform a manual failover. What action must you take afterward if you wish to restore the original architecture with the old primary as the new standby?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Recreate or reinstate the former primary database (using Flashback Database or backup restoration) to convert it into a valid standby.. After a failover, the old primary database is no longer in sync and cannot act as a standard standby without being reinstated or rebuilt (e.g., using Flashback Database or re-creating the standby).

Answer

Run a simple 'SWITCHOVER' command to reverse roles without any data synchronization checks.

Answer

Modify the listener.ora file manually via SSH and restart the clusterware.

Answer

Delete the standby database and provision a brand-new VCN in the primary region.

Question 2

Which OCI service can be used to monitor the health and performance of your load balancers and backend compute instances across multiple availability domains, triggering alarms if health checks fail?

Accepted Answer

OCI Monitoring service with Alarm definitions. OCI Monitoring service collects metrics and logs from resources like Load Balancers and Compute instances, allowing you to create alarms based on metric thresholds.

Answer

OCI DNS Traffic Management

Answer

OCI Audit service

Answer

OCI Vault service

Question 3

An architect is designing a multi-region disaster recovery architecture for an application running on OCI Compute. The database layer uses Oracle Data Guard. For the application tier, what is the recommended approach to handle stateless application servers in the DR region?

Accepted Answer

Pre-provision compute instances in a stopped state or use instance pools with standby configuration, activating them during a disaster event.. Stateless application servers in the DR region can be pre-provisioned in a stopped state or dynamically provisioned using instance pools and autoscaling, reducing costs while maintaining readiness.

Answer

Run all application servers at full capacity in both regions simultaneously with active write locks.

Answer

Store application binaries solely in Object Storage and compile them on the fly using user-data scripts during failover.

Answer

Rely entirely on manual creation of compute instances via the OCI console after an outage occurs.

Question 4

Which OCI networking component is required to securely connect a VCN in one OCI region to a VCN in another OCI region for cross-region Data Guard database replication?

Accepted Answer

Dynamic Routing Gateway (DRG) with Remote VCN Peering. Remote VCN peering using Dynamic Routing Gateways (DRGs) in both regions connects VCNs across regions.

Answer

Internet Gateway (IGW)

Answer

NAT Gateway

Answer

Local Peering Gateway (LPG)

Question 5

You are performing maintenance on an OCI Load Balancer backend set. You want to temporarily stop sending traffic to a specific backend server without immediately dropping active persistent connections. What feature should you use?

Accepted Answer

Enable Connection Draining on the backend server.. Draining allows a load balancer to stop sending *new* requests to a backend server while allowing existing persistent connections to complete gracefully.

Answer

Set the backend server weight to zero without enabling draining.

Answer

Delete the backend server from the backend set immediately.

Answer

Modify the security list to drop all TCP packets on port 443.

Question 6

Your organization has deployed an enterprise workload on OCI Exadata Database Service. You are configuring Data Guard with Fast-Start Failover (FSFO). To prevent split-brain scenarios where both primary and standby databases assume primary roles simultaneously, where must the Data Guard Observer be placed?

Accepted Answer

In a separate fault domain or external location independent of both the primary and standby database nodes.. The Data Guard Observer must run on a third, independent fault domain, availability domain, or separate site (such as another OCI region or on-premises) to act as a neutral arbiter preventing split-brain.

Answer

Directly on the primary database compute node to ensure low-latency communication.

Answer

Inside an OCI Object Storage bucket as a serverless function.

Answer

Inside the same Oracle Grid Infrastructure clusterware home on the standby database.

Question 7

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?

Accepted Answer

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

The database IP addresses change, requiring manual DNS A-record updates in OCI DNS.

Answer

You must manually regenerate new wallet zip files and redeploy them to all application servers.

Answer

Client applications must be rewritten to use hardcoded IP addresses instead of TNS names.

Question 8

Which OCI storage service provides massively scalable, highly durable regional object storage that is ideal for storing database backups and disaster recovery artifacts?

Accepted Answer

OCI Object Storage. OCI Object Storage is a regional, highly durable service designed for unstructured data storage, frequently used for backups and DR.

Answer

OCI Block Volume

Answer

Local NVMe Scratch Disks

Answer

OCI Boot Volumes

Question 9

An OCI architect is reviewing the disaster recovery plan for a mission-critical database. The business requires a recovery drill to be executed in production without interrupting ongoing primary database operations or impacting RPO. Which Data Guard feature allows this?

Accepted Answer

Snapshot Standby mode, which converts the standby to a read-write database for testing and later converts it back to a physical standby, merging changes.. Active Data Guard allows the standby database to be open in read-only mode while applying redo, and Snapshot Standby allows converting a standby to a read-write testing mode temporarily before converting it back.

Answer

Manual database cloning from Object Storage snapshots.

Answer

Logical Standby mode with SQL Apply disabled permanently.

Answer

Primary database switchover executed during peak business hours.

Question 10

Your organization uses OCI Full Stack Disaster Recovery to manage failovers between Region A and Region B. During a DR drill, you notice that a custom user-defined step failed because the dependent compute instance in Region B was not yet fully running. How should you resolve this dependency issue in the FSDR plan?

Accepted Answer

Edit the DR plan group and add a dependency or adjust the sequence order so that the start compute step completes before the custom script step.. OCI Full Stack Disaster Recovery allows you to configure plan groups and dependencies, ensuring that steps (such as running scripts or starting applications) wait until prerequisite infrastructure steps (like starting compute instances) complete successfully.

Answer

Manually SSH into each instance during the drill to run the script.

Answer

Increase the OCI Compute instance shape size in Region B to boot faster.

Answer

Disable all pre-checks in the FSDR plan settings.

Question 11

An enterprise application hosted on OCI requires high availability across multiple fault domains within a single availability domain. Which resource placement strategy should you use for your application compute instances?

Accepted Answer

Distribute instances evenly across three different Fault Domains.. Fault domains provide anti-affinity within an availability domain. Distributing instances across different fault domains ensures they do not share physical hardware, power, or top-of-rack switch infrastructure.

Answer

Configure a dedicated virtual cloud network for each fault domain.

Answer

Attach all instances to separate Internet Gateways.

Answer

Place all instances in Fault Domain 1 to optimize network latency.

Question 12

Which TWO of the following statements are correct regarding OCI Load Balancer features for high availability? (Choose two.)

Accepted Answer

An OCI Load Balancer can be deployed as either public (internet-facing) or private (internal).. OCI Load Balancers are regional services and can be configured as public or private to suit external or internal traffic routing requirements.

Answer

OCI Load Balancers are restricted to a single Availability Domain and cannot cross AD boundaries.

Answer

OCI Load Balancers only support Layer 3 packet routing.

Answer

OCI Load Balancers require manual customer-managed keepalived failover clustering.

Question 13

When designing a disaster recovery plan using OCI Full Stack Disaster Recovery (FSDR), which THREE resource types can be managed and orchestrated within a DR Protection Group? (Choose three.)

Accepted Answer

OCI Load Balancers and Network Load Balancers. FSDR supports orchestration of compute instances, database systems (Base DB, Exadata), and OCI Load Balancers / Network Load Balancers.

Answer

OCI Key Management service Vault encryption keys

Answer

OCI Identity and Access Management (IAM) global policies

Question 14

Which TWO actions can you take in OCI to ensure high availability of application data stored in Block Volumes? (Choose two.)

Accepted Answer

Enable asynchronous cross-region block volume replication.. Block Volume high availability and disaster recovery can be achieved using automated backup policies and cross-region block volume replication.

Answer

Store block volume backups locally on the compute instance root partition.

Answer

Manually disconnect block volumes every night via the API.

Answer

Disable encryption on block volumes to speed up replication.

Question 15

Which THREE factors should an architect evaluate when determining Recovery Point Objective (RPO) and Recovery Time Objective (RTO) for an OCI database disaster recovery solution? (Choose three.)

Accepted Answer

Level of automation configured for failover (e.g., Fast-Start Failover vs. manual scripts). RPO and RTO are driven by business tolerance for data loss, network throughput/latency constraints for replication, and the degree of automation (like FSFO or FSDR) applied to failover procedures.

Answer

The color scheme and layout of the OCI Console dashboard

Answer

The default tenant tenancy OCID string length