Question

A programmer can select almost any name for a JCL DD name. There are a number of reserved DD names that a programmer cannot use. Which of the following is a reserved DD name?

A. //SYSDDUMP DD ?
B. //SYSABEND DD ?
C. //STOPLIB DD ?
D. //JOBLAB DD ?

Answer 1

In JCL, //SYSABEND DD is a reserved DD name used for diagnostic purposes when a job terminates unexpectedly.

Step-by-step explanation:

In the context of JCL (Job Control Language), which is used on IBM mainframe systems, certain DD (Data Definition) names are reserved and cannot be used for arbitrary data sets. Among the options provided, //SYSABEND DD is a reserved DD name. The SYSABEND DD name is used to produce an abend (abnormal end) dump if the job terminates unexpectedly. This dump can then be used for diagnostic purposes by a system programmer. The other DD names mentioned, such as SYSDDUMP, STOPLIB, and JOBLAB, are not standard reserved DD names, although organizations may have their conventions.