Hi Monica,
FICA interview questions will be like below....
1.What is the difference b/w FICO and FICA
2.Why we need FICA
3.Which version you are using at present
4.What is the Recon Key?
5. do you have any idea about installment plan in FICA
6. what are the payment methods we can use in FICA
7. what is the deference b/w BP(Business Partner) contract account
8. what are the master data's in FICA
9. meaning of ISU
10. do you have any idea about billing and FICA integration
11. how do you create a installment plan in fica...... etc
these are just for sample questions...... 
Reward me if it is really helps you.
Regards,
Sri