==[ questions to ask for each ADT we encounter ]==
Abstract Data Type (ADT) X
 - What's in an X?
 - What operations are allowed/supported by an X?

Java
 - What would the Java interfaces for X look like?
 - Does Java have a built-in X?

Implementation
 - What are the implementation options?
 - What performance implications does each implementation have?

Applications
 - What can you do with an X?