Which aspect of generated Java code most often requires manual developer intervention after wca4z produces it?

Think of it like working hands-on with IBM mainframe systems — the answer here is 'The package declaration and import statements at the top of each generated Java file'. COBOL numeric types use fixed-point packed decimal with specific overflow and truncation behaviors that differ from Java's default numeric types, so developers must validate that edge cases produce id. On real mainframe exams, this concept comes up repeatedly so make sure you have it locked in.