Backstop Solutions Interview Question

In phone interview they asked about how to implement fibonacci algorithm, difference between equals and ==. Also asked me how to design hotel reservation. onsite they ask me to implement bowling game. The weird part the onsite bowling game implementation is kinda peer to peer so, first 2 people will come and you explain what are you doing and the second group of people will come and write the code and you would have to tell them the implementation. During this you dont have much time to think as they constantly talking with you.