Hi Jalina,
1. Is it possible to keep same technical name as 3.5x queries.
Yes It is possible to keep same tech name of Bex query.
2. I want to change around 400 queries from 3.5 to 7.0 version. Can you pls let me know, is there any tool to change 400 queries to 7.0 at one step.
AS per My knowledge there is no option for mass upgrade for queries.you need to open each query in 7.0 designer it will migrate to new version.
3. Can we use 3.5 Workbook in 7.0 Version. We are planning to keep same workbook in 3.5 and also in 7.0.
Once your queries are migrated to 7.0 I think you can not keep your workbooks in 3.5.better you can migrate your workbook also to 7.0 .
Regards,
Ganesh Bothe