The interviewer was good and chilled. He provided feedback that helped the interview proceed. He took time to nudge me in the right direction and helped me focus my energy on actually solving the program.

Given a string that has currency data like "USD:CAD:074,AUD", I was asked to write a function that would take two input currency strings and a number (the value in the first currency) and then determine the value of that number in the second currency.

The follow-up question was:

Given the same data as above, write a function that would take two currency strings and a number and find the value of that number.