Question: How filters are used in Spring Web?

1. Filters are called before a request hits the DispatcherServlet. They allow for interception-style, chained processing of web requests for security, timeouts, and other purposes.
2. Filters are used with a checksum algorithm that will filter invalid bytes out of a byte stream request body and allow for processing of HTTP requests from the DispatcherRequestServlet.
3. Filters are used with a checksum algorithm that will filter invalid bytes out of an octet stream a multipart upload and allow for chained processing of WebDispatcherServlet requests.
4. Filters are used to validate request parameters out of the byte stream request body and allow for processing of requests from the DispatcherRequestServlet.

Answer: The correct answer of the above question is Option A:Filters are called before a request hits the DispatcherServlet. They allow for interception-style, chained processing of web requests for security, timeouts, and other purposes.