JCL Interview Questions
Questions Answers Views Company eMail

What is a GDG


4 15440

What is a Generation Data Group (GDG)?

2 8657

How is a GDG base created?

5 23731

What is model dataset label(Model DSCB)?

1 22341

How are GDGs concatenated?

1 13035

How is a new GDG coded?

2 8630

When should DISP=MOD is used?


6 43081

How is a dataset passed from one step to another?


2 13946

How are datasets concatenated?


3 11994

What is the difference between the JOBLIB and the STEPLIB statements?

3 34959

Name some of the JCL statements that are not allowed in procs.?

1 13637

What is primary allocation for a dataset?

4 12411

What is the difference between primary and secondary allocations for a dataset?

8 43875

How many extents are possible for a sequential file ? For a VSAM file ?

3 16446

What does a disposition of (NEW,CATLG,DELETE) mean?

3 16825

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Un-Answered Questions { JCL }

Explain how can return codes be tested before execution of a job step?


Are there any set of rules for the names of the steps used in a job?


Explain the purpose of dd dummy statement?


Hello Guys, I have 1+ Year Experience in MAINFRAME TESTING. After 1 Week I have an Interview With a Company on Mainframe Testing. Please Could You Guys Please Suggest me What Sections Should I prepare ?? ___Tell Me the Topic Or Appropriate Site & Links. ?? ---------------Thank You


Is it possible to define dd statements as you want?


Is their any limit for data sets?


What is the function of a dd statement?


is there any way to execute more than one proc in the same exec statement at the same time..?


how you can direct the data to spool using SYSOUT option?


What is the function of the dd avgrec keyword in sms datasets?


What is the difference between run mode and addressing mode?


Is it possible to left uncode disp?


In sms datasets, what is the function of the dd mgmtclas keyword?


1) SORT FIELDS=(20,4,CH,D,10,3,CH,D) OUTREC FIELDS=(7:20,4,C' FUTURE ',20,2,10,3,1Z,1,9,13,7, 24,57,TRAN=LTOU,6X'FF') This example illustrates how a fixed-length input data set can be sorted and reformatted for output. The SORTIN LRECL is 80 bytes. The reformatted output records are fixed length with a record size of 103 bytes. SOLRF (the IBM-supplied default) is in effect, so unless the SORTOUT LRECL is specified or available, it will automatically be set to the reformatted record length of 103. in the above example i have some doubts that a) sort fields=(20,4,CH,D,10,3,CH,D) -what exactly it does and this fields related to output record fields or input record fields b)outrec used to refprmat the records after sorting that means could please reply me as soon as possible Thanks. Venkat


The disp in the JCL is MOD and the program opens the file in OUTPUT mode. What happens ? The disp in the JCL is SHR and the pgm opens the file in EXTEND mode. What happens ?