When COBOL uses COPY copybook-name REPLACING to parameterize field names, how does wca4z address this?

Think of it like working hands-on with IBM mainframe systems — the answer here is 'wca4z ignores REPLACING clauses and uses the base copybook field names in all generated Java classes'. wca4z resolves COPY REPLACING by generating distinct Java classes for each unique substitution, ensuring each class uses the specific field names that result from the REPLACING clause rather than the . On real mainframe exams, this concept comes up repeatedly so make sure you have it locked in.