Health Checking in ASP.NET Core builder.Services.AddHealthChecks() .AddSqlServer(connectionString) .AddCheck<CustomHealthCheck>("CustomCheck"); app.MapHealthChecks("/health"); Custom Health Check Example: public class CustomHealthCheck : IHealthCheck { public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken token) => Task.FromResult(HealthCheckResult.Healthy("Everything OK")); }

Short answer: Health Checking in ASP.NET Core builder.Services.AddHealthChecks() .AddSqlServer(connectionString) .AddCheck<CustomHealthCheck>("CustomCheck"); app.MapHealthChecks("/health"); Custom Health Check Example: public class CustomHealthCheck : IHealthCheck

Example code

{
public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken token) => Task.FromResult(HealthCheckResult.Healthy("Everything OK")); }

Real-world example (ShopNest)

ShopNest admin screens use MVC: controller loads data, Razor view renders HTML, Tag Helpers build forms safely.

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.