These are real interview questions asked in Azure Solutions Architect and Azure Cloud Architect roles at USA companies. Answers reflect real production architecture experience across enterprise Azure environments.

Tell me about yourself

Have 7+ years experience in cloud architecture with focus on Microsoft Azure.
Designed and delivered enterprise Azure solutions for banking, healthcare, and SaaS companies.
Expertise in Azure infrastructure, networking, identity, security, and cost optimization.
Strong in Terraform, AKS, Azure DevOps, and enterprise landing zone design.

What Azure projects have you delivered?

Designed enterprise Azure landing zone for a 500-person financial services company.
Built HIPAA-compliant Azure platform for healthcare application serving 2M+ users.
Led migration of on-premise SQL Server workloads to Azure SQL Managed Instance.
Designed multi-region AKS platform handling 10,000+ concurrent API requests.

What is an Azure Landing Zone?

Azure Landing Zone is a pre-configured, secure, scalable environment for running workloads in Azure.
Covers management groups, subscriptions, networking, identity, security, and governance.
Based on Azure Cloud Adoption Framework (CAF) principles.
Provides consistent foundation so teams can deploy workloads safely without reinventing the wheel.

How do you design Azure networking for enterprise?

Use hub-and-spoke topology — central hub VNet with shared services, spoke VNets per workload.
Hub contains firewall (Azure Firewall), VPN/ExpressRoute gateway, and DNS resolvers.
Spokes peered to hub — no spoke-to-spoke direct peering without routing through hub.
Use private endpoints to keep service traffic on Azure backbone.
Implement NSGs at subnet level and Azure Firewall for east-west and north-south control.

What is the difference between NSG and Azure Firewall?

NSG operates at layer 4 — controls traffic using IP, port, and protocol rules per subnet or NIC.
Azure Firewall operates at layer 7 — can inspect and filter based on FQDN, URLs, and threat intelligence.
NSGs are stateful and cheap — use for basic subnet-level controls.
Azure Firewall is centralized and more expensive — use for cross-VNet traffic and internet egress control.
Best practice: use both in layered security — NSGs at subnet, Azure Firewall at hub.

How do you design identity and access for Azure enterprise?

Use Azure Active Directory (Entra ID) as central identity provider.
Implement PIM — Privileged Identity Management — for just-in-time privileged access.
Use managed identities for Azure resources — eliminates service account passwords.
Apply RBAC at lowest scope needed — resource group or resource, not subscription level.
Enforce MFA and Conditional Access policies for all human identities accessing Azure.

What is Private Endpoint and when do you use it?

Private Endpoint assigns a private IP from your VNet to an Azure PaaS service (Storage, SQL, Key Vault).
Traffic stays on Azure backbone — does not traverse public internet.
Use for any PaaS service handling sensitive data in enterprise environments.
Pair with Private DNS Zones to ensure DNS resolution routes to private IP correctly.
Disable public access on services once private endpoint is in place.

How do you handle multi-region architecture on Azure?

Use paired Azure regions for disaster recovery — Microsoft guarantees region updates are staggered.
Use Azure Front Door for global traffic routing, WAF, and failover between regions.
Replicate data with geo-redundant storage, Azure SQL geo-replication, or Cosmos DB multi-region writes.
Design applications as stateless so they can fail over to secondary region without data loss.
Test failover regularly with Azure Site Recovery or custom runbooks.

How do you design AKS for enterprise?

Use separate node pools for system and user workloads.
Enable Azure CNI for pod-level networking with private IPs from the VNet.
Use workload identity (federated credentials) instead of service principals for pod access to Azure resources.
Place AKS API server in private mode — accessible only via private endpoint.
Use Azure Policy add-on to enforce governance on AKS pods and containers.

How do you approach Azure cost optimization?

Right-size VMs using Azure Advisor recommendations and usage metrics.
Use Reserved Instances for predictable workloads — up to 72% savings over pay-as-you-go.
Use Spot VMs for batch and fault-tolerant workloads.
Implement auto-shutdown for non-production environments.
Use Azure Cost Management budgets and alerts with tag-based showback per team or product.

How do you implement security in Azure?

Enable Microsoft Defender for Cloud across all subscriptions for posture management and threat detection.
Use Key Vault for secrets, certificates, and keys — never store secrets in code or config files.
Enable diagnostic logs and send to centralized Log Analytics or SIEM (Microsoft Sentinel).
Apply Azure Policy to enforce compliance — allowed regions, required tags, encryption at rest.
Conduct regular security reviews using Secure Score recommendations in Defender for Cloud.

How do you use Terraform with Azure?

Use AzureRM provider — declare all resources as code for consistency and auditability.
Store Terraform state in Azure Storage Account with state locking via Azure Blob leases.
Organize code into reusable modules — one per resource type or service pattern.
Use workspaces or separate state files per environment (dev, staging, prod).
Integrate Terraform plan and apply into Azure DevOps pipelines with manual approval gates for production.

What is Azure Monitor and how do you use it?

Azure Monitor collects metrics and logs from Azure resources, VMs, and applications.
Use Log Analytics workspace to query logs with KQL (Kusto Query Language).
Set up alerts for critical conditions — high CPU, failed deployments, security events.
Use Application Insights for APM — tracking request rates, failures, and dependencies.
Build dashboards in Azure Monitor or export data to Grafana for custom visualization.

How do you migrate workloads to Azure?

Use Azure Migrate for assessment — discovers on-premise servers and estimates costs and sizing.
Rehost (lift-and-shift) using Azure Site Recovery for quick migration with minimal risk.
Replatform workloads to PaaS (e.g., SQL Server → Azure SQL MI) for managed service benefits.
Refactor critical applications over time to cloud-native patterns (containers, serverless).
Always test failback and run parallel workloads before cutting over production traffic.

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