Answer
Interceptors modify all HTTP requests/responses. They inject tokens, handle errors, retry requests, log APIs, and centralize HTTP concerns for maintainability.
Quick Answer
HTTP Interceptors in Angular intercept all HTTP requests and responses before they reach the component code. Common uses: inject Authorization header for every request, handle 401 (unauthorized) globally by redirecting to login, show a global loading indicator, log all requests/responses, retry failed requests automatically. Register multiple interceptors - they form a chain with a defined order.
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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