Panel-ready .NET / C# questions for freshers and experienced developers. Practice at Coding Cadre in Faridabad, or Online from Delhi NCR.
Clients send an Idempotency-Key
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Authenticate during the handshake, authorize per message when needed, and validate origin.
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Sensitive actions re-check recent MFA or password confirmation.
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Prefer System.Text.Json source generation, reuse buffers, and avoid ToList on huge graphs.
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Domain has no infra references
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I use a hosted service with the processor SDK, complete on success, and abandon or dead-letter on failure.
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I create a Meter and counters or histograms for business events.
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Interpolation is readable and compile-checked for expressions.
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It holds local launch profiles, URLs, and env vars for Visual Studio and dotnet run.
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Attributes inject the caller name for INotifyPropertyChanged or logging helpers.
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A field EF maps that does not exist on your CLR type, like UpdatedAt.
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Build the provider with validate-on-build and validate-scopes enabled in Development.
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I use Microsoft.FeatureManagement or a remote flag service with filters by user and environment.
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Helpers that return strongly typed IResult implementations for OpenAPI metadata.
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It stops a dependency from flowing transitively to consumers.
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An async-friendly timer that awaits ticks without callback reentrancy headaches.
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HttpOnly, Secure, SameSite, short lifetimes, and sliding refresh with care.
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It spins real Docker dependencies like Postgres for integration tests.
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A value-type record with value equality semantics.
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I batch with AddRange, raise MaxBatchSize, or use bulk extensions for millions of rows.
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