Common Pitfalls to Avoid
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VM Disks
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Temporary disk is wiped if VM is stopped/deallocated.
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Persistent data must be stored on OS/Data disks.
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Exam trap: If scenario mentions “data must survive reboots,” never pick Temporary Disk.
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VMSS vs Availability Sets
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VMSS = auto-scaling.
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Availability Set = protect against hardware/maintenance failures.
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Exam trap: “Scale web servers automatically” → VMSS, not Availability Set.
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Availability Zones vs Availability Sets
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Zone = multiple datacenters in a region (higher resiliency).
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Set = within one datacenter (lower resiliency).
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Exam trap: “Protect against datacenter-level outage” → Zones, not Sets.
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App Service Plans
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Free/Shared = dev/test only.
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Deployment Slots require Standard or higher.
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VNet integration requires Premium or higher.
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Exam trap: If question mentions “zero-downtime deployments,” → Standard/Premium with slots.
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Containers
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ACI = single container or short-lived workloads.
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AKS = orchestration at scale.
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Exam trap: If question mentions “Kubernetes” → always AKS.
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Functions vs Logic Apps
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Functions = developer code.
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Logic Apps = workflow automation with connectors.
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Exam trap: If scenario says “low-code automation,” pick Logic Apps.
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Backup vs Snapshot vs ASR
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Backup = scheduled, long-term, application-consistent.
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Snapshot = quick, one-time, crash-consistent.
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Site Recovery = disaster recovery + failover.
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Exam trap: “Failover to another region” = ASR, not Backup.
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Quick Recall Hacks
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“Cost-efficient dev/test VM” → B-series
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“Memory-heavy workload” → E-series or M-series
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“Auto-scale VMs” → VM Scale Sets
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“Distribute across racks/updates” → Availability Set
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“Zero-downtime deployment” → App Service Deployment Slots
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“Run container without managing servers” → ACI
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“Orchestrate containerized apps at scale” → AKS
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“Event-driven code” → Azure Functions
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“Workflow automation with connectors” → Logic Apps
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“Daily backup with retention” → Azure Backup
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“Replicate workloads to another region” → ASR
What to Expect in the Exam
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Direct questions on VM types, disk types, and App Service tiers.
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Scenario-based questions about high availability (VMSS, Availability Sets, Zones).
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Confusion traps mixing Functions vs Logic Apps, ACI vs AKS, Backup vs Snapshot vs ASR.
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At least one deployment slot or zero-downtime deployment question.
Final Exam Strategy
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Always ask: Is the workload long-running (VM/App Service) or event-driven (Functions/Logic Apps)?
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Check if the requirement is about scaling (VMSS), resiliency (Availability Sets/Zones), or automation (App Service slots).
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For containers, decide if it’s single workload (ACI) or enterprise orchestration (AKS).
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For protection, match to Backup (retention), Snapshot (quick copy), or ASR (disaster recovery).