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Mismatch in Chapter 7

 
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HFSJ,there is a mismatch in Page 298 and Q14 part C of Page 341 in Chapter 7.

Q14 on Page 341 says : The request object is of type: javax.servlet.ServletRequest but Page 298,API for request implicit object is given as HttpServletRequest.
Same for response object.
 
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What does HttpServletRequest extends ? request is of type HttpServletRequest and can be interpreted as type of ServletRequest too.
 
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