Best place to verify these kinds of questions is by referencing the Servlet 2.3 specification. I *highly* advise reading both the Servlet and JSP specifications at least once and then using them as reference for when you are having a problem understanding some details (i.e. which methods take a relative path and which take a full path).
Sun Certified J2EE Architect for the J2EE Platform (Part 1)<br />Sun Certified Web Component Developer for the J2EE Platform<br />Sun Certified Programmer for the Java 2 Platform
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Devious Experiments for a Truly Passive Greenhouse!