Hi Venkat,
ad 1)
it is standard design for fixed term deposits that the start of term is considered to be INCLUSIVE -and the end of term EXCLUSIVE. This means that actually, 30/11/2012 exclusive is considered to be 29/11/2012 included. To have the 30/11/2012 included in the calculation, you might change the end of term to 01/12/2012 - or use the interest rate instrument product type, where you can choose if the start or end of term date is included.
ad 2)
Please see table VTBFHAZU: the DELFZ is saved here per activity RFHAZU (current activity can be read from VTBFHA-RFHAZUNR).
Best regards,
Marie
SAP TRM