What is the DTU model vs vCore model in Azure SQL?

Short answer: DTU (Database Transaction Unit): Bundled measure of CPU, memory, IOPS. vCore: Separate allocation of virtual cores, memory, and storage. vCore allows flexible scaling and cost optimization.

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.