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Does mainframe will support object oriented concept? Justify.
kckinney
- Sep 3rd, 2010
Yes, with the introduction of USS, z/OS can support Java or any number of POSIX compliant languages.There may be others depending on how tighly you defind OO programming. By using loose definition, you could code OO in any language.A tighter definition would limit the langueages considerably
priya anbanandam
- Jun 1st, 2006
hi all,AION tool used in mainframes ,it's an expert system tool uses object oriented concepts in depth.thanks
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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.
dhs01
- Sep 3rd, 2010
There is what is called a merge. The precedence is what is in the program, then what is in the JCL, lastly is what is in the DSCB associated with the file. You may get an open error if the program spe...
Hervey
- Oct 30th, 2006
The OS method for obtaining DCB information--there was none. It was up to whoever was creatingf the JCL to code these parms correctly. If the pgm included some of these; then jcl & program had to agree; otherwise, an S013 abend was received.
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What is difference between addressing mode and residential mode?
kckinney
- Sep 3rd, 2010
These both have to do with the location of memory relative to the 16meg "line"AMODE(32) means the program can access program defined storage above the line.RMODE(32) means the program itself...
Roshan George
- Mar 10th, 2006
Addressing mode specifies the architecture used, ie 24 bit addressing mode or the 31 bit addressing mode,ie, Amode=24 or Amode=31.The residential or Rmode is used to specify whether or not the job exists above or below the 16Mb line, ie, where it is resident.
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How can i search a character string in all the generations of a GDG dataset at once.Any code,utility will do?
kckinney
- Sep 3rd, 2010
If youre question is how to pull in all gens, simply code the GDG base without any absolute or relative reference.To search for a string in a dataset, you can use, DFSORT, ICETOOL, SAS, etc. The...
Sanjay
- Feb 15th, 2007
As srilkrishy said if you want to search for 'aaa' the following would be the code..//**********************************************************************//*****THIS JCL WILL SEARCH THE STRING IN GI...
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What is the use of syscat
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Why should BLKSIZE be in multiples of LRECL or less than it?
kckinney
- Sep 3rd, 2010
I'm afraid I don't understand the above answers and am pretty sure I wouldn't agree with them if I did.Assuming a VB record, you will not code a blksize as the LRECL is merely the longest ...
sai mainframes
- Jun 17th, 2008
Hi,I agree with the above answer.generally, for the purpose of compilation, compiler will accept the data in blocks.for example...if you specified LRECL=200, BLKSIZE=1000.when compiler takes one ...
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What is the difference between variable length & fixed block datasets?
kckinney
- Sep 3rd, 2010
FB datasets all have the same record length. Programs that look for data in certain columns are likely to use FB datasets. On the down side, there may be unused bytes on the end of e...
neeraja
- Oct 9th, 2007
In fixed length record, the record length is sum of all the record (length).In variable length record, the record size is maximum record length + 4bytes.
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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?
kckinney
- Sep 3rd, 2010
The traditional answer is (primary+(secondary*15)) or 10+150=160.This question isn't relevant beyond testing the most basic MVS knowledge. The reason is that products such as SMS, STOP37, et...
dhs01
- Apr 15th, 2009
Almost correct, VSAM and non-VSAM are important but equally important is whether the allocation is to SMS controlled dasd. Another factor to consider is that allocations can both get more and less tha...
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Change Dataset Name in PROC
How will you change the dataset name in PROC without altering it?
kckinney
- Sep 3rd, 2010
You can override it from the calling job. One way is to use a JCL override in the form of - PROCSTEP.PROCDD DD DSN=[overriding dsn name]This is fine provided you always use the same override dat...
avr1985
- Jul 4th, 2010
You can change the dataset name in the procedure without change its name in the Proc., mention STEPNAME.DDNAME DSN=NEWFILE NAME by writing above code in JCL it changes the proc DS in proc.
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What is a GDG? How is it referenced? How is it defined? What is a MODELDSCB? GDG stands for generation data group. It is a dataset with versions that can be referenced absolutely or relatively. It is defined by an IDCAMS define generation datagroup execution.
boddulasrikanth
- Sep 3rd, 2010
GDG is a Generation Data Group which is having grouped related datasets chronologically or functionally. It is referenced with the versions those are absolute and relative. It is defined by idcams g...
nthayyuru
- Mar 30th, 2009
GDG nothing but Generation Data Group, means data sets has been generated with version number.It will be referred as a dataset with version number then only we knows and identifying the dataset when i...
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Describe the JOB statement, its meaning, syntax and significant keywords?
The JOB statement is the first in a JCL stream. Its format is // jobname, keyword JOB, accounting information in brackets and keywords, MSGCLASS, MSGLEVEL, NOTIFY, CLASS, etc.
kpguptha
- Aug 22nd, 2010
Need for job statement: To identify the job with job name and the person who submitted the job,specify which class the job is belonging to using class parameter ,specify how the output shoud be ...
Don Carey
- Jul 14th, 2005
Notify is misspelled in the answer.
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.//jclsmt dd =SYSOUT (*,intdr) says what?
bdattagupta
- Apr 4th, 2010
Basically INTRDR is a special sysout thru which we can submit a JCL for example. Lets take the below example://STEP001 EXEC PGM=IEBEDIT ...
guraddiv
- May 14th, 2008
its not intdr, its intrdr which is a internal reader used to submit the jcl through the cobol program.
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Terminated Job
What happens when we give disp=(new,catlg,catlg) and the job is terminated?
yuvaevergreen
- Apr 4th, 2010
Disp=(new,catlg,catlg) indicates that the dataset to be 1.created in the particular step.2.catalogue the dataset if the job runs successfully.3.catalogue the dataset even if the job abends.
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What is the basic programme logic in JCl that will help to compile most of COBOL programmes in Z/OS?
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When a Step has ended with JCL error the data sets WOULD BE allocated?
ManFrame
- Nov 13th, 2009
No, If the JCL is ending with the JCL error no new dataset will be allocated but if the job is abending in that case it depends on the step count.Like if the job abends on step after which we are allo...
aripiralasubbu
- Apr 2nd, 2009
If JCL error occurs after the creation of data set statement in the step, then data set is created successfully, otherwise if error occurs before the creation of data set statement or creation statement then data set wont be created.
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How to by pass the step without cond parameter?
Alfredo Wagner
- Aug 1st, 2009
The step by pass without COND?occurs when- you code IF command- a previous STEP cancel- JCL ERROR occurs
Bibhu
- Mar 31st, 2006
Hi Siva, Its not that Disp=pass will solve the case. As Pass is used to pass the datatset from one step to another and not to pass the step itself.
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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.
dhs01
- Apr 15th, 2009
DD statement is the DATA DEFINITION Statement.It's function is to give a symbolic name to a file. This will allow a program to access a file through this name so that the file name may be cha...
Renuka Mudaliyar
- Apr 3rd, 2006
Its the Data Definition (DD) statement It should not exceed 8 charactersIt is normally the identifier name which we give in the cobol program to identify the that the trailing DSN is for the...
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What are the advantages of GDG?What is the diffrence between a GDG and a File?
dhs01
- Apr 15th, 2009
Basically a GDG is a catalog that will keep track of files. These files have names that conform to a certain standard. They can be generated and referenced using relative numbers. Existing versio...
serken
- Dec 20th, 2008
Actually the dataset names are created as followsX.Y.Z.G00001V00 X.Y.Z.G00002V00 X.Y.Z.G00003V00 X.Y.Z.G00004V00 X.Y.Z.G00005V00 X.Y.Z.G00006V00. . . . . . . . . etc up to the maximum number of genera...
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Can we concatenate two Datasets having different LRECL? If yes, then how?
dhs01
- Apr 15th, 2009
The largest first rule is one that has not been applicable for awhile. At one time this was necessary because of buffer allocations. This is no longer required.
mainframeguru11
- Jun 10th, 2008
THE RULE FOR CONCATANATION IS 1. LRECL and RECORD FORMAT SHOULD BE SAME2. IF THE BLOCK SIZE IS DIFFERENT THEN LARGEST BLOCK SIZE DATASET SHOULD BE IN THE FIRST DSN NAME3. DATASET MAY RESIDE IN DIFFERENT DEVICE AND VOLUMES.
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Space Identifier (ASID)
What is the name of the job that has an address space identifier (ASID) of one?
dhs01
- Apr 15th, 2009
ASID 1 is generally assigned to the master scheduler. Most shops will have the basically the same first 30 or so ASID tasks.
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