Multiple choice technology mainframe What is the maximum size of single line of JCL? 71 60 55 80 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The maximum size of a single JCL line is 71 characters. This is a specific JCL limitation - not 80 (D) which might be assumed from other systems, or 60/55 (B/C) which are too short. Option A is correct.