heres a quick tip on how to answer suma mam's viva questions:
1. take a deep breath
2. count to ten if she is about to ask a question, count to 200 if she is thinking, this is so that you dont get impatient while she is processing.
3. remember, if you cannot convince, confuse
4. if she confuses you, just look her in the eye and say, "aano?? jyothi padipichille??"
5. if she starts laughing, laugh with her, she will stop because shes not used to such a reaction...ever.
any more helpful tips, please contribute..
regards,
V