Why does IBM recommend a phased migration approach with wca4z rather than a big-bang replacement?
Select an answer to reveal the explanation.
Short Explanation
You want the phased migration answer because it lets you validate each transformed module step by step, catch defects early, and roll back if needed. That incremental validation is what reduces modernization risk.
Full Explanation
A phased approach lets teams validate each transformed module independently, catch defects early, and maintain rollback options at every step, reducing modernization risk. License-cycle limits, Java/COBOL incompatibility, and z/OS kernel rewrites are not the reason. Exam caveat: this concept recurs.