->The panel consisted of 5 people. but only 3 asked me questions
->They were asking questions in urdu. So its up to u whether u answer in english or urdu
->No strict attitude. Just relax
->They checked only original documents. No photocopies
->Take all documents with u. means (Degrees and transcripts/marksheets)
->Dont forget to take ur id card with u. First thing they gonna ask during attendence is ur id card
->In case of some provisional transcript/marksheet. It should clearly b showing ur total marks/CGPA of the degree.
->if u cant understand the map given on call letter then plan ur root using googlemap.

Best of luck 2 all

The answer to the question What is the functioning of ztbl ? / what is ztbl ?
Read wikipedia page about ztbl. u can also see ztbl officail website for help. in short its an organization working under federal government for the the well being of farmers. by giving them loans on easy basis.