How do you use managed identity with Key Vault?

Short answer: Enable Managed Identity on your App Service or Function App. Grant Key Vault access policy to the identity. Access secrets without storing credentials: var client = new SecretClient(new Uri(" new DefaultAzureCredential()); KeyVaultSecret secret = client.GetSecret("MySecret");

Example code

string value = secret.Value;

Real-world example (ShopNest)

Connection strings and payment keys live in Key Vault—not in source control or plain appsettings on disk.

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.