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Domain 03 · 15–20% of Exam

Design Business Continuity Solutions

Backup, disaster recovery, and high availability design for Azure and hybrid workloads

15–20%Exam Weight
7Sub-topics
MediumPriority
Practice Tests →
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Domain 03 covers designing backup and disaster recovery solutions that meet stated RTO and RPO requirements for Azure and hybrid workloads, and designing high availability architectures for compute, relational databases, and semi-structured and unstructured data. It accounts for 15–20% of the exam. The table below maps every official sub-topic to the type of question you will face in the exam.

What the Exam Tests
Sub-domain / TopicWhat kind of question to expect
Recommend a recovery solution for Azure and hybrid workloads that meets recovery objectives (RTO, RPO)
  • Questions present a disaster recovery scenario with specific RTO and RPO values and ask which Azure service or combination best satisfies both targets. You need to understand which options provide regional failover, which are limited to in-region protection, and which require manual versus automated recovery steps to match the right solution to the stated objectives.
  • Questions present a scenario with three on-premises applications, each with different and clearly distinct BCDR requirements, and ask separately for each application which Azure service to recommend. One application needs failover to a second on-premises data center. Another needs point-in-time data recovery at daily granularity with a generous RTO. The third needs long-term data retention across seven years and the ability to run from Azure in a disaster within a short RTO. You need to match each combination of requirements to the service or pair of services that addresses all of them, understanding that Site Recovery handles orchestrated failover while Backup handles data retention and point-in-time recovery.
Recommend a backup and recovery solution for compute
  • Questions present a backup policy configuration shown in a graphic or exhibit, then ask two separate completion questions about the policy. One question asks the maximum period for which a VM backed up by this policy can be recovered, and another asks the minimum RPO the policy provides. You need to read the policy configuration to determine the longest retention setting defined and the most frequent backup schedule configured, then match those values to the correct options.
  • Questions present a requirement to perform daily file-and-folder backups from on-premises Windows Server machines to a Recovery Services vault, maintaining a minimum number of copies in Azure and minimizing cost. The scenario asks separately what to configure on the servers and which storage redundancy option to use. You need to know which agent is installed on on-premises servers to send backups directly to a Recovery Services vault, and which redundancy option stores the required number of copies at lowest cost.
  • Questions present a ransomware protection scenario where backup resources must be deployed across two subscriptions: one subscription holds the protected workloads and another holds an authorization gate that prevents unauthorized changes to critical backup settings. The scenario asks separately what to create in each subscription. You need to know which resource in the first subscription hosts backup policies and protected items, and which resource in the second subscription acts as a cross-subscription authorization gate that requires an additional role assignment before backup configuration changes can be made.
Recommend a backup and recovery solution for databases
  • Questions present a migration requirement for SQL databases specifying user-initiated backups, cross-region replication, and minimal administrative effort. and ask which deployment option best satisfies all three. You need to evaluate how much of the backup and replication process is automated versus manually configured for each option, and eliminate options that require significant ongoing operational effort to maintain continuity.
  • Questions present a resiliency requirement for SQL databases and ask whether the solution should use auto-failover groups, active geo-replication, or zone-redundant deployment. You need to understand what each option automates at failover, how each affects the application connection string, and which failure scenarios each one is designed to address.
  • Questions present an Azure Database for MySQL Flexible Server that must minimize downtime in the event of a failover to a paired region. You need to distinguish between options that provide a synchronized secondary ready for promotion versus options that only protect data without enabling automated regional failover.
  • Questions present a migration of on-premises MySQL databases to Azure Database for MySQL Flexible Server with two requirements: the databases must remain accessible if a datacenter fails, and costs must be minimized. The question asks which compute tier to recommend. You need to know which tiers support the high availability configuration required for datacenter-level resilience and which tier does not support HA while remaining the lowest cost option.
  • Questions present a case study with a database backup retention requirement that exceeds the default automatic backup period for Azure SQL Database. You need to distinguish between the service that orchestrates VM-level failover, the feature that adds geographic read replicas, and the specific Azure SQL Database feature that extends backup retention beyond the built-in maximum to meet regulatory or organizational requirements.
Recommend a backup and recovery solution for unstructured data
  • Questions present a scenario where on-premises file data must be made available with rapid recovery if the primary location fails, and ask which Azure services to combine. You need to understand that Azure File Sync synchronises file server data to Azure file shares and enables fast recovery by reconnecting servers to the cloud endpoint, while Backup-based solutions focus on point-in-time recovery rather than continuous cloud-hosted availability.
Recommend a high availability solution for compute
  • Questions present a case study with specific resiliency requirements and ask you to choose the correct number of dedicated host groups and VM Scale Sets. Options present several numerical combinations. You need to understand how dedicated host groups map to fault domain isolation and how VM Scale Sets interact with dedicated hosts to provide the required level of HA, then identify the combination that satisfies the stated resiliency level without over-provisioning.
  • Questions present a series where a stateless web app must provide full .NET framework access, regional redundancy, and OS-level access for custom dependencies. Each question proposes a different solution and asks Yes or No. You need to evaluate each proposed solution against all three requirements independently, knowing that certain load balancers are regional rather than global, that certain hosting platforms do not expose the underlying OS, and that certain solutions satisfy only some of the constraints.
  • Questions present a case study showing a specific web tier design diagram and ask a series of three Yes/No statements about that design: whether it supports the stated redundancy requirement, whether it supports autoscaling, and whether it requires manual configuration if a region fails. You need to read the design and evaluate each statement independently. This tests whether you can identify which Azure services in a given architecture diagram inherently provide redundancy, which support automatic instance scaling, and which require manual intervention to redirect traffic following a regional outage versus those that handle failover automatically.
Recommend a high availability solution for relational data
  • Questions present a case study with resiliency requirements for databases being migrated to Azure, and ask which service tier provides the required level of availability. You need to match the tier's availability architecture and replica configuration to the stated resiliency requirement, distinguishing between tiers that differ in replica synchrony, storage type, and failover behaviour.
  • Questions present a HA requirement for SQL Server on Azure VMs and ask you to choose between Always On Availability Groups and Failover Cluster Instances, paired with different listener and storage configurations. You need to reason through the failover speed, cost, and infrastructure dependency implications of each combination.
Recommend a high availability solution for semi-structured and unstructured data
  • Questions present a multi-office file server scenario where users across all offices access shared files from a primary location, and ask which solution ensures users can access the files as quickly as possible if the primary location becomes inaccessible. You need to understand which solution enables cloud-based file serving with local caching across multiple office locations, and why Recovery Services vault solutions address backup and recovery rather than continuous availability from alternative locations.
Common Questions

AZ-305 Domain 03: Frequently Asked Questions

Common questions about what this domain tests, which business continuity topics matter most, and how to reason through recovery and availability design questions on exam day.

What does AZ-305 Domain 03 cover?

Domain 03 covers designing backup and disaster recovery solutions that meet stated RTO and RPO requirements for both Azure-native and hybrid workloads, and designing high availability architectures for compute (VMs, scale sets), relational databases (SQL Database, SQL Managed Instance), and semi-structured and unstructured data (Cosmos DB, Blob Storage). It accounts for 15–20% of the exam.

How are RTO and RPO tested on AZ-305?

Questions present a scenario with specific RTO and RPO values and ask which Azure service or feature combination best satisfies both targets. You need to understand which approaches achieve near-zero RPO (active geo-replication, zone-redundant storage), which achieve near-zero RTO (multi-region active-active architectures, auto-failover groups), and the cost and complexity trade-offs of each approach.

How is high availability for compute tested on AZ-305?

High availability questions test the ability to choose between availability sets, availability zones, and VM Scale Sets for a given scenario. You need to understand the SLA difference between each option, when zone-redundant deployments are preferable to regional redundancy, and how Azure Load Balancer and Application Gateway fit into a high availability compute design.

What database high availability options are tested on AZ-305?

AZ-305 tests the difference between Business Critical tier (built-in read replicas and HA), active geo-replication (readable secondary in another region, manual failover), and auto-failover groups (automatic failover with connection string transparency, listener endpoint). You need to match the right option to a stated availability and read-scale requirement, understanding when each is appropriate and what trade-offs each involves.

How is Azure Site Recovery tested on AZ-305?

Site Recovery questions test when to recommend it as a disaster recovery solution for VMs. including Azure-to-Azure scenarios (replicating a VM to a secondary region) and on-premises-to-Azure scenarios. Questions also test how Site Recovery compares to Azure Backup for DR purposes, and the role of Recovery Services vaults in Site Recovery configurations.

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