Interview Q&A

Short answer: zure? Strong Answer CQRS separates: Read operations Write operations Implementation: Commands → Service Bus Queries → Read DB Real-world Example: E-commerce: Writes → Order DB Reads → Optimized read DB

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 Kudu Console: Or Log Stream in Azure Portal → App Service → Log Stream

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: Strong Answer Architecture: Event → Service Bus Processor → Azure Function Notification → Email/SMS Real-world Example: Order shipped → user gets notification instantly

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: rchitecture: Event → Service Bus Processor → Azure Function Notification → Email/SMS Real-world Example: Order shipped → user gets notification instantly

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: Azure Portal → App Service → Custom Domains → Add domain → Validate → Update DNS. SSL/TLS can be applied using Azure-managed certificates.

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: Strong Answer Techniques: Indexing Query optimization Connection pooling Read replicas Real-world Example: Slow query fixed using indexing → performance improved 80%

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 Service supports HTTPS endpoints. Use Azure-managed certificates or bring your own certificate. SSL binding is done per custom domain.

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: Strong Answer Patterns: Retry (Polly) Circuit breaker Fallback Dead-letter queue Real-world Example: Payment service failure handled via retries + DLQ

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 the startup command for Linux apps (App Service Plan) in Azure Portal. For Windows apps, configure web.config or use Program.cs in ASP.NET Core: public class Program

Example code

{
public static void Main(string[] args)
{
var host = CreateHostBuilder(args).Build(); // Custom startup logic here host.Run(); }
}

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: “What happens if Service Bus message is processed twice?” Strong Answer: Implement idempotency Use unique transaction IDs Real-world

Example code

Prevent duplicate payment deduction PART 3 — MOCK INTERVIEW + TRICKY QUESTIONS (REAL EXPERIENCE)

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 scale rules based on metrics: CPU %, memory, HTTP queue length. Set minimum and maximum instance counts. Azure automatically adds or removes instances to handle traffic. Azure Q&A

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: And fault tolerance. rchitecture: API Layer → Azure App Service Order DB → Azure SQL Messaging → Azure Service Bus Background processing → Azure Functions Cache → Redis Monitoring → Application Insights Flow:

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: Visual Studio Publish: One-click deployment from IDE. Azure CLI / PowerShell: Command-line deployment scripts. Zip Deploy: Upload a zipped package of the app. FTP / FTPS: Manual upload of files to Azure App Service. WebDeploy (MSDeploy): Supports incremental deployment. CI/CD Pipelines: Using Azure DevOps or GitHub Actions.

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: API calls instead of Service Bus?” Weak Answer: “Service Bus is better” Strong Answer: Synchronous calls create tight coupling and increase failure risk. Problem: If Payment API is down: Entire order process fails Solution: Using Service Bus: Order service continues Payment handled asynchronously Real-world Insight: In high-scale systems, synchronous calls become bottlenecks.

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: Method Description Use Case Zip Deploy Upload a zip file; replaces app content Quick automated deployments FTP/FTPS Manual file upload via FTP client Small apps or manual updates WebDeploy (MSDeploy) Incremental deployment with config & db sync Complex apps with dependencies

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: goes down?” Strong Answer: First, Azure Service Bus is highly available, but still I design for failure. Mitigation: Retry with exponential backoff Use secondary region (Geo-disaster recovery) Persist critical data before publishing Advanced insight: Never rely on a single point of failure.

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: dvanced insight: Never rely on a single point of failure.

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: zure? Create workflow YAML in .github/workflows/. Use Azure WebApp Action to deploy. name: Build and Deploy ASP.NET Core on: push: branches: [ main ] jobs: build-and-deploy: runs-on: ubuntu-latest steps: uses: actions/checkout@v3 name: Setup .NET uses: actions/setup-dotnet@v3 with: dotnet-version: '6.0.x' name: Build run: dotnet publish -c… Release -o……… publish name: Deploy to Azure Web App uses:…

Explain a bit more

azure/webapps-deploy@v2 with: pp-name: 'my-azure-app' publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }} package: ./publish

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: Create workflow YAML in .github/workflows/.

Explain a bit more

Use Azure WebApp Action to deploy. name: Build and Deploy ASP.NET Core on: push: branches: [ main ] jobs: build-and-deploy: runs-on: ubuntu-latest steps: uses: actions/checkout@v3 name: Setup .NET uses: actions/setup-dotnet@v3 with: dotnet-version: '6.0.x' name: Build run: dotnet publish -c Release -o publish name: Deploy to Azure Web App uses: azure/webapps-deploy@v2 with: app-name: 'my-azure-app' publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }} package: ./publish

Example code

Create workflow YAML in .github/workflows/. Use Azure WebApp Action to deploy. name: Build and Deploy ASP.NET Core on: push: branches: [ main ] jobs: build-and-deploy: runs-on: ubuntu-latest steps: uses: actions/checkout@v3 name: Setup .NET uses: actions/setup-dotnet@v3 with: dotnet-version: '6.0.x' name: Build run: dotnet publish -c Release -o publish name: Deploy to Azure Web App uses: azure/webapps-deploy@v2 with: app-name: 'my-azure-app' publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }} package: ./publish

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: production issues in Azure?” Weak Answer: “Check logs” Strong Answer: I follow a structured approach: Step 1: Use Application Insights Identify slow requests Check dependency failures Step 2: Analyze logs Use Log Analytics queries Step 3: Reproduce issue Use staging environment Real-world Example: API latency issue: Found slow SQL query Added indexing Reduced response time from 2s → 150ms

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: PI latency issue: Found slow SQL query Added indexing Reduced response time from 2s → 150ms

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: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline:

Example code

Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline: Create Azure DevOps Pipeline:

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: duplicate message processing?” Strong Answer: I implement idempotency. Strategy: Use unique transaction ID Check if already processed Real-world Example: Payment system: Prevent duplicate charges

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: Azure App Service App Settings override appsettings.json. Use Azure Key Vault for sensitive information like connection strings. builder.Configuration.AddAzureKeyVault( new Uri(" new DefaultAzureCredential());

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: developers make in Azure?” Strong Answer: Not designing for failure and scalability. Common mistakes: No caching Tight coupling No retry logic Hardcoded secrets Real-world impact: System crashes under load.

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.