Virtualization-Based Disaster Recovery EDRP Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   After a regional outage, an organization fails over its virtualized workloads from the primary site to the DR site using storage-based replication. The primary site is restored and the administrator must fail back. The DR site has been running for several days and contains new data. Which failback approach minimizes data loss and downtime?

   • AFail back immediately by stopping replication and starting the primary site VMs from the last replicated snapshot.
   • BReverse replication from the DR site to the primary site, then perform a planned failover during a maintenance window.
   • CShut down the DR site VMs and copy the entire VM files back to the primary site using a bulk transfer tool.
   • DUse a backup of the primary site taken before the outage and restore it at the primary site, then resume normal operations.
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2. 7application · medium

   A company runs a mission-critical SQL Server VM on VMware vSphere. The DR plan requires that the VM be continuously replicated to a secondary site with a recovery point objective (RPO) of no more than 5 minutes. The storage team has implemented vSphere Replication with a 5-minute RPO. During a scheduled failover test, the DBA notices that transactions committed on the primary just before the test are missing on the replica. What is the most likely cause?

   • AThe replication was configured with a crash-consistent snapshot rather than application-consistent quiescing.
   • BThe replica VM was not powered off before the failover test.
   • CThe RPO of 5 minutes is too aggressive for the storage array.
   • DThe vSphere Replication appliance was not updated to the latest version.
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4. 8application · medium

   A company has a DR plan that uses virtual machine snapshots for point-in-time recovery. During a scheduled DR test, the administrator discovers that the snapshots are not application-consistent for the database VM. What should the administrator do to ensure application-consistent snapshots?

   • AInstall and configure the backup agent or use VMware Tools quiescing to ensure the database is in a consistent state before the snapshot.
   • BUse a storage array snapshot instead of a hypervisor snapshot.
   • CTake the snapshot while the database is in the middle of a transaction.
   • DUse the hypervisor's built-in snapshot feature without any additional configuration.
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5. 9application · medium

   A company has a DR plan that relies on virtual machine snapshots. The administrator wants to test the snapshots' ability to restore a VM. Which testing method is most appropriate?

   • ACreate a clone of the VM from the snapshot and test the clone in an isolated environment.
   • BTake a new snapshot and then immediately revert to it.
   • CDelete the snapshot and verify that the VM still functions.
   • DRevert a production VM to a snapshot during business hours.
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6. 10application · medium

   A virtualized environment hosts a database VM that is part of a clustered application. The DR plan includes taking a snapshot of the VM before applying a critical patch. After the patch fails, the administrator reverts to the snapshot. Which consideration is most important when reverting to the snapshot in this clustered environment?

   • AThe snapshot must be taken from the SAN array rather than the hypervisor to ensure crash consistency.
   • BThe snapshot revert will restore the VM to the exact point-in-time state, but other cluster nodes may have newer data that causes inconsistency.
   • CThe snapshot must be deleted before reverting to avoid storage space consumption.
   • DThe VM must be powered off before taking the snapshot to ensure application consistency.
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