Business Continuity & Disaster Recovery Flashcards

An architect needs to design a BCDR solution where the secondary site actively serves read traffic during normal operations. Which pattern best describes this?

Answer: Active-Active (multi-region)

An Active-Active multi-region pattern means both regions simultaneously handle traffic, including reads, ensuring zero failover time and enabling true load distribution.

Which Azure service enables you to define, test, and execute automated recovery plans that sequence the failover of multiple VMs and applications?

Answer: Azure Automation runbooks integrated with Azure Site Recovery

Azure Site Recovery recovery plans support Azure Automation runbooks as pre/post-failover actions, enabling orchestrated, automated failover sequences across multiple VMs and tiers.

A company requires its on-premises VMware VMs to be replicated to Azure for disaster recovery. Which Azure service handles this scenario?

Answer: Azure Site Recovery with the Configuration Server

Azure Site Recovery with an on-premises Configuration Server (and optional Process Server) handles replication of VMware VMs to Azure for DR purposes.

An organization wants to minimize costs for their disaster recovery environment by keeping Azure resources in a minimal state and scaling up only during failover. Which DR strategy does this represent?

Answer: Pilot light

The Pilot light strategy keeps a minimal core infrastructure running in the DR region (just enough to 'light the pilot') and scales up compute resources only when failover is triggered.

Which Azure feature allows you to test an Azure Site Recovery failover without affecting production replication or end users?

Answer: Test failover using an isolated virtual network

Test failover in Azure Site Recovery spins up replicated VMs in an isolated Azure virtual network, allowing DR validation without disrupting ongoing replication or production workloads.

A solutions architect must ensure that an Azure Cosmos DB account can serve reads and writes from multiple regions simultaneously with no single point of failure. Which configuration achieves this?

Answer: Multi-region account with multi-region writes enabled

Enabling multi-region writes (multi-master) in Azure Cosmos DB allows all configured regions to accept both reads and writes simultaneously, eliminating any single point of failure for write operations.

When designing a BCDR strategy for Azure App Service, which combination provides geo-redundancy with automatic failover and lowest RTO?

Answer: Two App Service instances in different regions behind Azure Traffic Manager with health probes

Deploying App Service instances in multiple regions with Azure Traffic Manager health probes enables automatic DNS-based failover, providing geo-redundancy with the lowest achievable RTO.