Interview Q&A

Short answer: Use Azure.Storage.Blobs NuGet package. Upload example: var blobServiceClient = new BlobServiceClient(connectionString); var containerClient = blobServiceClient.GetBlobContainerClient("mycontainer"); var blobClient = containerClient.GetBlobClient("file.txt"); using var fileStream = File.OpenRead("localfile.txt"); await blobClient.UploadAsync(fileStream, overwrite: true); Download example: var downloadPath =…

Explain a bit more

"downloaded.txt"; await blobClient.DownloadToAsync(downloadPath);

Example code

Use Azure.Storage.Blobs NuGet package. Upload example: var blobServiceClient = new BlobServiceClient(connectionString);
var containerClient = blobServiceClient.GetBlobContainerClient("mycontainer"); var blobClient = containerClient.GetBlobClient("file.txt");
using var fileStream = File.OpenRead("localfile.txt");
await blobClient.UploadAsync(fileStream, overwrite: true); Download example: var downloadPath = "downloaded.txt";
await blobClient.DownloadToAsync(downloadPath);

Real-world example (ShopNest)

Product images upload to Azure Blob Storage; the DB only stores the blob URL.

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.

Short answer: Blob tier determines cost and access latency. Can be set during upload or later: await blobClient.SetAccessTierAsync(AccessTier.Cool); Hot: Frequently accessed Cool: Infrequent access Archive: Rarely accessed

Real-world example (ShopNest)

Product images upload to Azure Blob Storage; the DB only stores the blob URL.

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.

Short answer: Use Azure.Storage.Queues package. Send message: var queueClient = new QueueClient(connectionString, "myqueue"); await queueClient.CreateIfNotExistsAsync(); await queueClient.SendMessageAsync("Hello, Azure Queue!"); Receive message: var message = await queueClient.ReceiveMessageAsync(); Console.WriteLine(message.Value.MessageText); await queueClient.DeleteMessageAsync(message.Value.MessageId,…

Example code

Use Azure.Storage.Queues package. Send message: var queueClient = new QueueClient(connectionString, "myqueue");
await queueClient.CreateIfNotExistsAsync();
await queueClient.SendMessageAsync("Hello, Azure Queue!"); Receive message: var message = await queueClient.ReceiveMessageAsync(); Console.WriteLine(message.Value.MessageText); await queueClient.DeleteMessageAsync(message.Value.MessageId, message.Value.PopReceipt);

Real-world example (ShopNest)

Order-paid events go to Service Bus; an Azure Function sends the confirmation email asynchronously.

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.

Short answer: Table Storage stores key-value pairs in entities. Use PartitionKey and RowKey for unique identification. Example: var tableClient = new TableClient(connectionString, "MyTable");

Example code

await tableClient.CreateIfNotExistsAsync();
var entity = new TableEntity("partition1", "row1")
{ { "Name", "John" }, { "Age", 30 } }; await tableClient.AddEntityAsync(entity);

Real-world example (ShopNest)

Product images upload to Azure Blob Storage; the DB only stores the blob URL.

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.

Short answer: Configure via Azure Portal or Azure CLI. Example CLI: az storage cors add --methods GET POST --origins -services b --account-name mystorage

Real-world example (ShopNest)

Product images upload to Azure Blob Storage; the DB only stores the blob URL.

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.

Short answer: Use Shared Access Signatures (SAS) Enable storage account firewall & VNet rules Use Azure AD authentication

Real-world example (ShopNest)

Product images upload to Azure Blob Storage; the DB only stores the blob URL.

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.

Short answer: Use Azure Monitor, Metrics, and Diagnostic Logs. Track requests, bandwidth, errors, latency. Can integrate with Log Analytics or Application Insights.

Real-world example (ShopNest)

Product images upload to Azure Blob Storage; the DB only stores the blob URL.

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.

Short answer: Use Azure Pipelines → Create new YAML pipeline or Classic pipeline. Example YAML for ASP.NET Core: trigger: main pool: vmImage: 'windows-latest' steps: task: UseDotNet@2 inputs: packageType: 'sdk' version: '7.x' script: dotnet build --configuration Release displayName: 'Build project' script: dotnet test --no-build --verbosity normal displayName: 'Run tests'

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.

Short answer: pps? Add a release stage in pipeline targeting Azure App Service. Example YAML step: task: AzureWebApp@1 inputs: zureSubscription: 'MyAzureConnection' ppName: 'my-webapp' package: '$(System.DefaultWorkingDirectory)/drop/*.zip'

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.

Short answer: Add a release stage in pipeline targeting Azure App Service. Example YAML step: task: AzureWebApp@1 inputs: azureSubscription: 'MyAzureConnection' appName: 'my-webapp' package: '$(System.DefaultWorkingDirectory)/drop/*.zip'

Real-world example (ShopNest)

ShopNest’s API runs on Azure App Service with staging slots—swap staging to production after smoke tests.

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.

Short answer: Logical groups representing Dev, QA, Staging, Production. Support approval gates, deployment strategy, and rollback.

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.

Short answer: Use Pipeline Variables (secret) or Azure Key Vault integration.

Example code

variables: name: MySecret value: $(MySecretFromVault) isSecret: true

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.

Short answer: Publish in pipeline: task: NuGetCommand@2 inputs: command: push packagesToPush: '**/*.nupkg' publishVstsFeed: 'MyFeed' Consume in projects by adding feed URL in nuget.config.

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.

Short answer: Use Boards, Dashboards, Queries, and Analytics. Monitor burn-down charts, lead time, and cycle time.

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.

Short answer: Link GitHub repo in Service Connections. Configure build pipeline to trigger on GitHub pushes or pull requests.

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.

Short answer: Machines managed by you to run CI/CD pipelines. Useful for custom software, large builds, or on-prem resources.

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.

Short answer: Key-value pairs used in pipelines for configuration, secrets, or dynamic values. Can be set at pipeline, stage, or runtime.

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.

Short answer: Define stages in YAML for Dev, QA, Staging, and Production. Example: stages: stage: Build jobs: job: BuildJob steps: script: dotnet build stage: Deploy dependsOn: Build jobs: deployment: DeployJob environment: 'Production' strategy: runOnce: deploy: steps: script: echo Deploying to Production

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.

Short answer: Use deployment slots in Azure App Service. Configure previous successful release as rollback target in pipeline. Example: swap staging → production if failure occurs.

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.

Short answer: Users authenticate via OAuth 2.0 / OpenID Connect. Azure AD issues tokens (ID token, access token, refresh token). Tokens are validated by the app to authorize access.

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.

Short answer: Use Microsoft.Identity.Web for ASP.NET Core. Configure authentication in Program.cs: builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationS cheme) .AddMicrosoftIdentityWebApi(builder.Configuration.GetSection("AzureA d")); app.UseAuthentication(); app.UseAuthorization(); Tokens from Azure AD validate API requests.

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.

Short answer: Enable App Service Authentication / “Easy Auth”. Connect to Azure AD under Authentication settings. App Service validates tokens before reaching the app.

Real-world example (ShopNest)

ShopNest’s API runs on Azure App Service with staging slots—swap staging to production after smoke tests.

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.

Short answer: App Registration represents a client app in Azure AD. Defines Application ID, redirect URIs, API permissions, secrets/certificates.

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.

Short answer: Managed Identity allows apps to access Azure resources without storing credentials. System-assigned or user-assigned identity is granted access to resources like Key Vault or SQL Database.

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.

Short answer: Go to App Registration → API permissions Add delegated or application permissions Admin consent may be required

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.