What is a Shared Access Signature (SAS)?

Short answer: SAS provides temporary, limited access to storage resources. Can define expiry time, permissions, and resource type.

Example code

var sasToken = blobClient.GenerateSasUri(BlobSasPermissions.Read, DateTimeOffset.UtcNow.AddHours(1)); Console.WriteLine(sasToken);

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.