Hi Lavamya,
1. What is the protocol used to enter the pipeline steps?
To acces to the ICM: HTTP/S or tRFC with IDOCs
2. Pipeline step for asyn and syn scenario?
The same steps in the pipeline
4. how can u select data in sender JDBC if the user does not have the rights?
If you dont have right to acces the database you can't access
5. how can we pull the data in case of sender channel without select and update statements?
With a stored procedure.
6. how do the data enter between the integration engine and adapter engine? what is the process?
You can use the RWB to test purpose and the message will go to the IE via HTTP/S protocol
7. q1, q2, context change, q3, q4, context change, q5, q6. what will be the output in case of a collapse context?
8. Java mappings
You should concret your doubt. Check this first http://wiki.sdn.sap.com/wiki/display/XI/Using+PI+7.1+API+for+Java+mapping
9. User defined functions that i have created
As far as i know you can't search them.
10. Which is the best adapter to choose among soap, http, proxy
There is not better adapter, each one is useful or mandatory in determinated cases.
11. why IDOC and HTTP doont require a sender channel?
This is true depending of your PI version. In PI 7.1 and below, the communication is direct with the IE and therefore no sender agreement is needed.
12. Both IDOC and RFC comes from ABAP stack, but why do we use RFC sender channel alone?
I dont understand this question.
13. in syn scenario how does the mapping part work between the sender and receiver?
Inside the operation mapping with message mapping, java mapping, xsl mapping or abap mapping. You will need two mappings.
14. What are stored procedure and can it be used to perform actions in JDBC channel?
A stored procedure is like function or soubrutine in a SQL side. You pass parameters, in the DB there are some code that deals with their tables and finally get a response.
Regards.