Backup and Disaster Recovery Design
Continuity questions test backup strategy, restore validation, Azure Backup, Site Recovery, RTO, RPO, retention, and hybrid recovery requirements.
How to study for AZ-305
Treat each AZ-305 item as an architecture decision: identify the workload requirement, governance boundary, data shape, recovery objective, and infrastructure tradeoff before choosing.
Core concepts
Concept 1
Backup and Disaster Recovery Design questions test Azure architecture tradeoff decisions rather than isolated service-name recall.
Exam cue: Identify the requirement, workload type, data shape, access boundary, recovery target, and operational ownership model.
Concept 2
The best answer maps business requirements to identity, governance, data, resilience, compute, network, security, cost, and operations constraints.
Exam cue: Choose the Azure design that satisfies the constraint with the least unnecessary operational burden.
Concept 3
Eliminate answers that ignore governance scope, recovery objectives, data durability, private connectivity, security boundaries, or workload fit.
Exam cue: Prefer Well-Architected choices: secure, reliable, cost-aware, observable, governed, and scalable.
Risk pitfalls and guardrails
Choosing a service before identifying the business driver and nonfunctional requirement.
Guardrail: Avoid answers that pick services without checking governance scope, data model, recovery target, migration dependency, or network boundary.
Solving availability while ignoring identity, data protection, compliance, or cost constraints.
Guardrail: Avoid answers that pick services without checking governance scope, data model, recovery target, migration dependency, or network boundary.
Assuming a migration, networking, or storage pattern is correct without checking workload dependencies.
Guardrail: Avoid answers that pick services without checking governance scope, data model, recovery target, migration dependency, or network boundary.
Memory anchors
RTO
Recovery time objective is the maximum acceptable time to restore service after disruption.
RPO
Recovery point objective is the maximum acceptable amount of data loss measured in time.
Azure Backup
Azure Backup protects supported workloads with policies, retention, and recovery points.
Recovery Services Vault
A Recovery Services vault stores backup and Site Recovery management data.
Azure Site Recovery
Azure Site Recovery replicates workloads for disaster recovery and orchestrated failover.
Test Failover
A test failover validates recovery without disrupting the production workload.
Backup Policy
A backup policy defines schedule, retention, and protected workload behavior.
Cross Region Restore
Cross-region restore can recover data in a paired region when configured and supported.
Immutable Backup
Immutable backup helps protect recovery points from deletion or tampering.
Recovery Runbook
A recovery runbook defines the ordered tasks needed to restore service.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
You must back up Azure VMs on a schedule with retention and restore points managed by Azure. Which service fits?
Your design must replicate VMs to a secondary region and orchestrate failover for disaster recovery. Which service fits?
Answer all questions to submit.
Next step personalized recommendations
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Move forward only after this module is stable.
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