IBM Natural Interview Question:

Explain difference between read work file 1 and read work file once? Why we are using work file once?

Submitted by: Administrator

Both used to read sequentila file.
Read work file 1:

1. is a processing loop strating like:
Read work file 1 file1
---
--
--
end- work.
Here ---> file 1 is file name here and 1 is arbitary file
number which is translated into dataset names CMwk01 in jcl.

read work file once:
1. Reads only one reacord is to be read.
2. there is no processing loop
eg. Read work file once
Submitted by: Administrator