JCL interview questions and answers

In this video, I have explained the following basic interview questions and answers in JCL.

What is JCL ?
Why do we require JCL in Mainframe?
What are the different kinds of JCL statements available?
What is the maximum number of DD statements in a JOB?
What is the maximum number of steps coded inside a JOB?
What is the purpose of using JOB statement?
What is the significance of using EXEC statement in JCL?
What is the purpose of DD statement?
What is the difference between specifying DISP=OLD, DISP=SHR, and DISP=MOD for a dataset?
What does a disposition of (NEW, CATLG, DELETE) mean?
What does a disposition of (NEW, CATLG, KEEP) mean?
What does a disposition of (OLD,, DELETE) mean?
What does a disposition of (, PASS) mean?
How do you access a file that had a disposition of KEEP?
What is DISP= (NEW, PASS, DELETE)?
What is the purpose of DISP=MOD
What will happen when the DISP is not coded for a new dataset?
What is TYPRUN parameter?
What is RESTART? How is it invoked?
How do you designate a comment in JCL?
What are the keywords associated with DCB? How can you specify DCB information?
What is the purpose of the REGION parameter?
What is the purpose of Time parameter
What is the difference between BLKSIZE and LRECL?
What are the rules for concatenating DD statements?
What is a primary allocation for a dataset?
How many extents are possible for a sequential file and a VSAM file?
What is the alternate use of COND parameter?
What is the purpose of the COND parameter?
What is COND=EVEN ?
What is COND=ONLY?
how many members can be created inside a single PDS(Partitioned data set)?
What are the different ways of giving input to JCL.
What are the valid DSORG values ?
What does the TIME parameter signify?
What is the main difference between creating a new sequential flat file and a partitioned
What are the differences between JES2 & JES3 ?
What is a Generation Data Group (GDG)?
How do you create GDG generation files?
How do you create a GDG base ?
What is the purpose of Limit parameter?
What is the usage of EMPTY/NOEMPTY?
What is the usage of SCRATCH/NOSCRATCH?
How are GDGs concatenated?
What is a PROC?
What is the difference between an instream and a catalogued procedure?
How do you restart a PROC from a particular step?
What parameter we cannot use in catalog procedure?
How many Instream-Procedures(procs) can be Coded in a single Job?
Name some of the JCL statements that are not allowed in procs.?
How many steps we can override in a PROC?
I have a COBOL program that Accepts some input data. How do you code instream data in a JCL?
What is STEPLIB, JOBLIB?
What is order of searching of the libraries in a JCL?
What happens if both JOBLIB and STEPLIB is specified?
When you specify multiple datasets in a JOBLIB or STEPLIB, what factor determines the order?
How to change default PROCLIB?
How do you pass parameter to the program as the job is being executed ?