Have you ever thought about using XML in DB2 for z/OS, but were afraid that you would need to study a lot of material before you could actually begin? Don’t worry! You do not need to know much before you start. You can get by with basic DB2 for z/OS knowledge.
This part of the certification test is about the application lifecycle. It is not about the methodology you should adopt, it is about the generic tasks you should consider like testing, verifying the results, test data, and performance. And of course, main focus here is DB2 and SQL.