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What is the difference between specifying DISP=OLD and
DISP=SHR for a dataset?
 Question Submitted By :: JCL
I also faced this Question!!     Answer Posted By  
# 1
OLD specifies exclusive use of a dataset, SHR allows
multiple jobs to concurrently access the dataset Note: When
updating a dataset, you would normally use OLD.
Is This Answer Correct ?    25 Yes 2 No
# 2
disp=old means at the time of execution another job can't
use that file.after completion of job another job can use.

disp=shr at the timeof exection many user can use in read
Is This Answer Correct ?    13 Yes 0 No
Shailendra 2008
# 3
Read from beginning of dataset. But if u write, then it
will overwrite on existing data. i.e old data is lost.
Is This Answer Correct ?    5 Yes 2 No
# 4
Generally DISP = OLD is used when a Dataset is generated in
a step of job and then subsequently used in the next up
coming steps of the same job ,
DISP=SHR signifies that the dataset is can be shared by the
multiple jobs.
Is This Answer Correct ?    7 Yes 6 No
# 5
disp= old will give exclusive use of dataset.
disp= shr....multiple job can use the dataset concurrently..
but in both case, while writing , it will overwrite to old
dataset..i.e, old data will be lost.
Is This Answer Correct ?    1 Yes 0 No

Other JCL Interview Questions
  Question Asked @ Answers
Min no of member?s (PDS) in one directory block?   10
A file has dta in S9(09) COMP format. How do I move the data into a character field X(10)?   2
Can anyone tell me the syntax for printing two files at two different destinations in a single step?   3
Can we browse or edit the GDG dataset if it is a tape entry?   4
Hi, Say I have 10 flat files and I want to copy all these 10 flat files to a GDG versions flat files (I have GDG base: FDWS01.TEST.RESTORE) in one shot. Can we do that in one shot using a JCL. May be by using IEBGENER. It's a bit urgent. So anyone's fast rely would be appreciated.. Thanks in advance.. 10 flat files ----------------------------------- FDWS01.SUB.RESTORE1 FDWS01.SUB.RESTORE2 FDWS01.SUB.RESTORE3 ; ; FDWS01.SUB.RESTORE10 TO GDG versions ----------------------- FDWS01.TEST.RESTORE.G0001V00 FDWS01.TEST.RESTORE.G0002V00 FDWS01.TEST.RESTORE.G0003V00 ; ; FDWS01.TEST.RESTORE.G0010V00   4
Describe the EXEC statement, its meaning, syntax and keywords?   2
Write a jcl to execute a job by 7 a.m on Jan 20,1986 ? Maples 5
How to identify in JCL that an input file is empty without reading it? L&T 3
I have two files each contains 10 records. I would like to copy both files into one output file but in alternate sequence. for e.g. first record from file1 then record 2 from file2..... RBS 3
Hi, I have 3 files say file A , file B and file C.I want to form an output file in which i will have all the records from file A. Files B and C also may contain records that are present in file A.I want those records also to be included in my output file. for eg: file A contains: 1 2 3 file B contains: 2 4 5 file C contains: 1 3 5 So in my output file should look like: 1 2 3 2 1 3 Can any one help ???.....thanks in advance.   2
how to override PROC? please give answer in details. Please mention how to write it in JCL. Thanks in advance. UHG 6
how do u see jobs submitted before ur job ?   1
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