In the Job Control Number, what does yy represent?

• A. Last two digits of the year
• B. Four-digit year
• C. Month
• D. Day

Answer: (A)

The yy segment in a Job Control Number is the year portion written with two digits. It encodes the year as the last two digits (for example, 24 for 2024) to keep the code compact. The month and day come from other parts of the JCN, not from this two-digit year field. Using two digits saves space and keeps the structure uniform, with the understanding that the full year is interpreted within the system’s current century context. This is why the correct interpretation is that yy represents the last two digits of the year, not a full four-digit year, nor the month or day.