What is the use of SYSPRINT, SYSIN, DUMMY in JCL ?

Correct Answer: SYSPRINT: All system output will appear under this DD card Suppose you are copying a VSAM file using IDCAMS Then, number of records processed, highest condition code etc will appear under sysprint You cannot customise SYSPRINT output SYSIN: This is nothing but SYStem INstruction Suppose, you want to sort a file on certain key You have to have following command under SYSIN SORT FIELDS = (starting-col,length,data-type,A/D) SUM FIELDS = NONE DUMMY: Mainly used where user is intended to simulate a program without creating an output file