Answer
Filters run at specific pipeline stages: authorization, resource, action, exception, result. Used for logging, caching, security, and cross-cutting concerns.
Quick Answer
Filters inject behavior into the MVC pipeline at specific stages. Use Action Filters to log parameters, validate custom headers, or measure execution time. Use Authorization Filters for custom auth checks. Use Exception Filters to format error responses consistently per API. Filters are more MVC-aware than middleware — they receive action context and model state.
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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