IBM MVS Interview Questions And Answers

PDS can extend 15 time after it is allocated. PDSE can
extend 122 times.

dummy dataset means it dont have any control fields. so,we
place a dummy

ex:SYSIN DD DUMMY(NO FUNCTION).

JCL UTILITY TOOLS:

IEBGENER UTILITY:

IT IS USED TO CREATE,COPY OR PRINT SEQUENTIAL DATASETS.

IEBCOPY UTILITY:

I IS USED TO COPY NUMBERS OF PARTITIONED DATASETS.

IEFBR14 UTILITY:

THIS UTILITY IS CALLED DUMMY UTILITY ALSO BY USING THIS
UTILITY WE CAN CREATE A DATASET.

16 - GPR
16 - Access Registers
16 - Control Registers
1 - Special Register called PSW
4 - floating-point Registers

To spool means "to operate (an input/output device) by
using buffers in main and secondary storage. "

Not sure if there is any full form.

If you meant SDSF, it stands for sytem display and search
facility.

A PDS or Partitioned Data Set is a dataset containing
multiple members, each of which holds a separate sub-data
set, similar to a directory in other types of file systems.
This type of dataset is often used to hold executable
programs (load modules), source program libraries
(especially Assembler macro definitions). A PDS is most
somewhat analogous to a Zip file on microcomputers, except
the files stored in a PDS are not compressed.

The Partitioned Data Set can only allocate on a single
volume with the maximum size of 65536 tracks.

Besides members, a PDS consists also of their directory.
Each member can be accessed directly using the directory
structure. Once a member is located, the data stored in
that member is handled in the same manner as a PS
(sequential) data set.

As in DIRECTORY we can store files as well as another
DIRECTORY which includes other files but PDS includes only
mebers not another PDS inside it.

TYPE RECOVERYON on command promt then UNDO command enable.

UNDo command is used to it rollbacks previous data.

SRCHFOR 'abc' search for abc in the current PDS or LIBRARY.

SRCHFOR C 'xyz', (+5) search for 'xyz' and (+5) in
continuation (i.e. in the same line only).

SMS in mainframe is Storage Management System. I hope it has
nothing to do with telephone SMS.

Regarding the Storage Management System, I can say something
soon.

You can create a new pds with file aid 3.2.
Here the question is, same structure of an existing pds.
it is easy to note down the structure and type it again
while allocating a daataset, but what is the shortest form
of doing this is the question...

Panel name is ISPf/PDF primary option menu

b.PR/sm

Swap-in and Swap-out is the tranfer of all valid pages
between auxilary storage to real storage and vice-versa.

Address space is the range of addresses in real storage.

The size of address space for 16 bit address space is 64kb

For s/370 the address space 21 bit- 16MB
For s370XA and EXA address space is 31 bit- 2GB