.NET and C# interview questions

URL versioning or header versioning with Asp.Versioning packages.

It removes duplicates using default equality.

Owned types store related value objects in the same table or dependent table without their own identity key for domain use.

Only redirect to local URLs with Url.IsLocalUrl or an allowlist.

Records give value-like equality and concise immutable models.

Response caching uses HTTP cache headers and middleware.

Span views memory without allocating for slicing and parsing.

Fact is a single test.

You write the business row and an outbox message in one transaction, then a relay publishes to the broker.

AsSplitQuery avoids cartesian explosion from multiple includes.

It maps an HTTP GET endpoint to a handler delegate.

It is a high-performance producer/consumer queue for in-process async work.

Authorize hubs and methods, validate users on connect, and avoid trusting client payloads.

EnsureCreated builds schema from the model without migration history — fine for demos.

The proxy sends X-Forwarded-For and Proto

I add tenant id filters globally and set tenant from the request.

Task.Run offloads CPU work to the thread pool.

It switches from IQueryable to in-memory LINQ from that point.

PerfView or dotnet-trace shows allocations and GC pauses.

It redirects HTTP to HTTPS so cookies and tokens stay safer.