AZ-900 Describe Azure architecture and services Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  Azure Site Recovery

  Why this is correct

  Azure Site Recovery is correct because it performs block-level, nearly continuous replication of on-premises VMs and physical servers to Azure, maintaining a ready-to-start replica. Beyond copying data, it orchestrates full failover—including planned and unplanned failover—and supports non-disruptive disaster-recovery drills (test failovers). This makes it a disaster recovery service, not just a backup tool.

• ✗

  Azure Backup

  Why it's wrong here

  Azure Backup is incorrect for this scenario because it takes scheduled point-in-time snapshots of the underlying VM disks and retains them in a Recovery Services vault, allowing file/item-level or entire-VM restore to a previous state. It does not continuously replicate changes to a stand-by server and cannot orchestrate a failover with drill testing where the replica is promoted to production and then returned. Therefore it protects against data loss over time but not against site outage with instant failover.

  When this WOULD be correct

  An exam question asking for a service to back up Azure VMs or on-premises files/folders to Azure, with long-term retention and restore capabilities, would make Azure Backup the correct answer.

• ✗

  Azure Migrate

  Why it's wrong here

  Azure Migrate is incorrect because it is a discovery, assessment, and migration tool that analyzes on-premises server configurations, dependencies, and performance to plan a one-time lift-and-shift or re-platform to Azure. It does not establish an ongoing replication stream or disaster-recovery state after migration completes; instead, it drives the initial move and assumes the workload runs natively in Azure afterward, with no built-in continuous failover capability.

  When this WOULD be correct

  Azure Migrate would be correct in a scenario where a company wants to assess the suitability of their on-premises environment for migration to Azure, including dependency mapping and cost estimation, before performing a one-time migration of servers and workloads.

• ✗

  Azure Traffic Manager

  Why it's wrong here

  Azure Traffic Manager is incorrect because it is a DNS-based traffic router that balances user traffic across healthy public-facing endpoints, like multiple VMs or regional deployments, using priority or performance methods. While it can reroute users to a failover endpoint if one becomes unavailable, it does not create, replicate, or maintain the underlying VM replicas—it only directs requests to already existing, running endpoints and therefore cannot recover a failed VM by itself.

  When this WOULD be correct

  An exam question where a company needs to distribute user traffic across multiple Azure regions for high availability and low latency, with automatic failover if one region becomes unavailable. For example: 'A company wants to route users to the nearest Azure region and automatically redirect traffic if a region fails.'

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”

Go deeper

Related to this question