What is Azure Active Directory?

Short answer: Azure Active Directory (Azure AD) is a cloud-based identity and access management service. Provides authentication, single sign-on (SSO), multi-factor authentication (MFA), and identity protection for apps and services.

Real-world example (ShopNest)

ShopNest on Azure typically uses App Service + SQL Database + Blob Storage + Application Insights for monitoring.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.