Answer
Async frees threads during I/O waits, prevents thread starvation, improves scalability, and avoids deadlocks. ASP.NET Core is designed for async performance from MVC to Razor to middleware.
Quick Answer
ASP.NET Core is built to handle thousands of concurrent requests per server. Synchronous I/O (blocking database calls, synchronous file reads) wastes threads waiting. Async I/O releases the thread to handle other requests. The thread pool scales to match load; blocking negates this. async Task everywhere is the correct default for all I/O-bound work.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ