BNP Paribas Interview Question

Technical interview:1)based on resume as I mentioned java.. So he asked all the oops concept ie inheritance, interface, polymorphism, abstraction and situation based programs on that.. Study everything in detail.. Refer ocpjp for java book everything is explained very nicely... One question that I got stuck in was all the interface implements which interface that makes the interface dynamic.. The answer was comparable interface.. Then he asked me one puzzle 4 ppl wants to cross the bridge at a time only 2 can go.. The time taken by 4 ppl is 1,2,5 and 10 mins respectively Crossing the bridge puzzle ... Google bridge puzzle you will find it.. Then he asked me do you have any questions.. And they will try to confuse u and break your confidence but don't loose it.. Be confident n keep ur concepts clear