Oracle9i Database Fundamentals 1Z1-031: Managing Instances and Creating Databases introduces users to managing an Oracle instance, creating a database, and using globalization parameters.
Oracle9i Database Fundamentals 1Z1-031: Managing Storage Structures and Undo Data introduces users to the underlying storage structure of a database and to using undo segments.
Oracle9i Database Fundamentals 1Z1-031: Managing Users and Profiles introduces users to creating and managing users and to control resources using profiles.