Azure interviews for cloud, DevOps and developer roles usually test your knowledge of core services and how you design reliable, secure and cost-effective solutions. Here are common questions with example answers.
Core Concepts
What are regions and availability zones?
A region is a geographic area containing one or more datacenters. Availability zones are physically separate locations within a region, each with independent power, cooling and networking. Spreading resources across zones protects against a single datacenter failure.
IaaS, PaaS and SaaS: what’s the difference?
With IaaS, such as Azure Virtual Machines, you manage the operating system and everything above it. With PaaS, such as Azure App Service or Azure SQL Database, Azure manages the platform and you manage your application and data. SaaS, such as Microsoft 365, is complete software you simply use.
What is a resource group?
A resource group is a logical container for related resources that share a lifecycle. You can deploy, manage permissions for and delete them together, which makes environments easier to organise.
Compute
When would you use App Service, Azure Functions or AKS?
App Service suits web apps and APIs without managing servers. Azure Functions suits event-driven code that runs in response to triggers and scales automatically. Azure Kubernetes Service suits containerised applications that need orchestration and more control.
What are virtual machine scale sets?
Scale sets manage a group of identical VMs that can scale in or out automatically based on demand or a schedule, often behind a load balancer.
Identity and Security
What is Microsoft Entra ID?
Microsoft Entra ID (formerly Azure Active Directory) is Azure’s cloud identity service. It handles sign-in, single sign-on, multi-factor authentication and access to Azure resources and applications.
How does role-based access control (RBAC) work?
RBAC assigns roles, such as Reader, Contributor or Owner, to users, groups or managed identities at a scope: a management group, subscription, resource group or single resource. Follow least privilege and grant only what each identity needs.
How should applications store secrets?
Store secrets, keys and certificates in Azure Key Vault, and let applications access them with managed identities instead of credentials in code or configuration files.
Storage and Networking
What types of Azure Storage are there?
Blob storage for unstructured objects such as files and backups, Azure Files for managed file shares, Queue storage for messages, and Table storage for simple key–value data. Redundancy options range from locally redundant to geo-redundant.
What is a virtual network and a network security group?
A virtual network (VNet) is your private network in Azure, divided into subnets. Network security groups contain rules that allow or deny traffic to resources by port, protocol and source.
Reliability and Cost
How would you design a highly available web application?
Deploy across availability zones, use a load balancer or Application Gateway, choose a zone-redundant managed database, store state outside the app servers, and set up health probes, monitoring and backups. For regional failures, add a secondary region with traffic routing such as Azure Front Door.
How do you control Azure costs?
Right-size resources, use autoscaling, shut down non-production resources when idle, use reservations or savings plans for steady workloads, and set budgets and alerts in Cost Management.
How to Prepare
- Build a small project: a web app with a database, Key Vault and monitoring.
- Be ready to draw an architecture and explain your choices.
- Review general system design interview questions.
Get Help in the Interview Itself
Preparation gets you most of the way. For the interview itself, ApplyQuick Interview Copilot listens to each question and suggests a structured answer based on your resume and the job description, on Zoom, Microsoft Teams, Google Meet or a phone call. You can also rehearse first with an AI mock interview. Every plan starts with a 7-day free trial.
