WAAAAAAAAAAAAAAAAAAAAAAAAAAYYYYYYYYYYYYYYYYYYYYYYYY too complicated for SCJA.
It's very high level. Know what a Servlet does, when it does it, why it does it, and how it should be used. That's really it. Intricate coding details won't be asked about the Servlet and JSP API. Fundamental Java coding concepts are tested, such as for loops, variable declarations, and the like, but going deep into peripheral APIs - that's definitely not needed.