Interview Q&A

Short answer: Register app with multi-tenant support in Azure AD. Use common or organizations endpoint for authentication: Validate tenant ID in API to ensure authorized 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: APIM is a full-featured API gateway for publishing, securing, monitoring, and analyzing APIs. Helps abstract backend services, provide security, and manage consumption by developers.

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: Import via OpenAPI/Swagger, WSDL (SOAP), or Azure Functions. Example in Azure Portal: Go to APIM → APIs → Add API → OpenAPI Upload your .json or .yaml API specification Configure backend URL and endpoints

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 Keys: Generated per subscription, required in request headers or query parameters. OAuth 2.0: APIM can validate bearer tokens issued by Azure AD or external IdP. Example – API key header: GET Header: Ocp-Apim-Subscription-Key: <your-subscription-key>

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: Policies are configuration statements to modify API behavior. Can be applied at global, API, or operation level. Examples: rate limit, caching, authentication, request/response transformation Example – Rate limit policy: <rate-limit calls="10" renewal-period="60" />

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 the <rate-limit> or <quota> policy in APIM. Controls max requests per minute/hour to prevent abuse.

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 API versions via URL path, query string, or header. Example: URL versioning: /v1/products Header versioning: api-version: 1.0

Example code

Create API versions via URL path, query string, or header. Example: URL versioning: /v1/products Header versioning: api-version: 1.0

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 Azure Monitor, Application Insights, or built-in logging. Track requests, response times, errors, and throttling events.

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 policies like <set-body>, <set-header>, <rewrite-uri>

Example code

Add a custom response header: <set-header name="X-Custom-Header" exists-action="override"> <value>API Managed</value> </set-header>

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: Developer portal allows you to: Browse APIs View documentation Generate code snippets Test endpoints using “Try It” button

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 API gateway policies to enforce: Authentication/authorization IP filtering TLS/HTTPS Keeps backend services hidden from direct internet 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: A subscription grants access to APIs in APIM. Each subscription has a unique key for identifying and authorizing requests. Can enforce rate limits and quotas per subscription. Troubleshooting – Q&A

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: Application Insights – Application performance, exceptions, telemetry Azure Monitor – Metrics, alerts, dashboards Log Analytics – Query logs across resources Azure Diagnostics – Collect runtime logs from App Services, VMs Network Watcher – Monitor networking issues

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: Application Insights is an APM (Application Performance Monitoring) service. Tracks requests, dependencies, exceptions, page views, and telemetry for .NET apps. Example – Integrating with ASP.NET Core: builder.Services.AddApplicationInsightsTelemetry(builder.Configurati on["APPINSIGHTS_INSTRUMENTATIONKEY"]);

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: Distributed tracing tracks requests across services and microservices. Application Insights supports W3C trace context. Example in ASP.NET Core: builder.Services.AddApplicationInsightsTelemetry(options => {

Example code

options.EnableDependencyTrackingTelemetryModule = true; });

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: Centralized log collection and query platform in Azure Monitor. Allows querying with Kusto Query Language (KQL) to analyze logs from App Services, Functions, SQL, etc. Example query: requests | where success == false | summarize count() by operation_Name

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 TrackMetric API in Application Insights. Example: var telemetry = new TelemetryClient(); telemetry.TrackMetric("ItemsProcessed", 100);

Example code

Use TrackMetric API in Application Insights. Example: var telemetry = new TelemetryClient(); telemetry.TrackMetric("ItemsProcessed", 100);

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: Azure Monitor is a comprehensive platform to collect, analyze, and act on telemetry across Azure resources. Supports metrics, logs, alerts, dashboards, and automation.

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 Azure Monitor Alerts on metrics or log queries. Example: Alert when HTTP request failures exceed threshold: Metric: ServerResponseTime Condition: > 1000ms Action: Email, Webhook, Logic App

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 Application Insights in Function App. Monitor exceptions, failed invocations, and retries. Example: Check telemetry via FunctionInvocationException.

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: Use Query Performance Insight in Azure SQL portal Monitor DTU consumption, long-running queries, blocking sessions Enable Query Store for historical analysis

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 Center in App Service Enable App Service logs (Application, HTTP, Web server logs) Access logs via Kudu Console or FTP

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: Advanced management console for Azure App Services Provides file explorer, process explorer, environment variables, and log streaming Access via Q&A

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 modular architecture with microservices or layered design. Host APIs in Azure App Services or Azure Functions. Store data in Azure SQL, Cosmos DB, or Blob Storage. Implement CI/CD with Azure DevOps or GitHub Actions. Apply monitoring with Application Insights and security with Azure AD.

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 Azure Key Vault to store secrets, connection strings, and certificates. Configure managed identity for pipeline tasks. Avoid storing secrets in code or pipeline variables directly. Example – Azure DevOps pipeline: task: AzureKeyVault@2 inputs: azureSubscription: 'MyServiceConnection' KeyVaultName: 'MyKeyVault' SecretsFilter: '*'

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.