The best place I have found for Oracle documentation is tahiti.oracle.com. Its free and comprehensive.
If you want to pass the test you need to learn how Oracle works, and not just memorize a bunch of stuff.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.