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JCL Program Execution
If a JCL containing 5 steps in a proc, how will you execute only 2nd and 4th steps?
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GDG Generations and PDS Members
Why should we go for generations in GDG when the members in PDS can do the same work?
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JCL program Copy Book Copylib
You have mentioned the copylib in JCL program but the copy book is not expanded in the program what is the possible error you get?
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Data Redundancy
Explain what are controlled and uncontrolled data redundancy?
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Coding RECFM=F over RECFM=FB
What is the advantage of coding RECFM=F over RECFM=FB why not F.
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Two Phase Locking Protocol
Explain the concept of two phase locking protocol with an example?
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DISP Parameter
If the DISP parameter for a dataset is DISP=(NEW,PASS,CATLG), What will happen when the JCL is run? The first time? The second time?
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calculate total space allocated for file
If file is having space parm as SPACE=(CYL,(10,10)) i.e. 10 primary, 10 secondary. So how much cylinders totally it will take before dataset filled till end?
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compress PDS
how did you compress a pds? explain in detail?
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Space Identifier (ASID)
What is the name of the job that has an address space identifier (ASID) of one?
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JCL Steps
How to Run same steps in a jcl 'n' number of time each time with different input files without repeating the steps n times?
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VSAM-ESDS-AIX
When its not possible to read ESDS file randomly through COBOL program then what is the use of creating AIX for that file? If reading that file randomly is possible then plz give me the details. I tried but without success.
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Send email from JCL in Mainframe
How to send a Mainframe file to a mailbox using a JCL? Mailbox could be any? What parameters need to be passed in the JCL like - Host address, mail address, etc..?
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PS and PDS
What is the difference between PS and PDS ? If a PS file is almost equal to member of a PDS. Then what is the neccerasy to use a PS file.?
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What are the keywords associated with DCB? How can you specify DCB information? What is the OS precedence for obtaining that DCB information, ie. where does the system look for it first?
The keywords associated with the DCB parameter are LRECL, RECFM, BLKSIZE and DSORG. The DCB information can be supplied in the DD statement. The sysem looks for DCB information in the program code first.
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What is a PROC? What is the difference between an instream and a catalogued PROC?
PROC stands for procedure. It is 'canned' JCL invoked by a PROC statement. An instream PROC is presented within the JCL; a catalogued PROC is referenced from a proclib partitioned dataset.
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Describe the DD statement, its meaning, syntax and keywords?
The DD statement links the external dataset name (DSN) to the DDNAME coded within the executing program. It links the file names within the program code to the file names know to the MVS operating system. The syntax is // ddname DD DSN=dataset name. Other keywords after DSN are DISP, DCB, SPACE, etc.