Also mentioned is that URL rewriting is handeled in a vendor specific way, tomcat uses ';' to append the extra info into the URL
WILL I GET SUCH TYPES OF VAGUE QUESTIONS IN REAL EXAM ???
Implementation of the request and response objects are "not guaranteed" to be thread safe. They should only be used within the scope of the request handling thread.
References to the request and response objects must not be given to objects executing in other threads as the resulting behaviour may be non-deterministic.