Roller Derby Test O'Matic

Turn left and learn the rules.

Question #905:

Which of the following is a valid unique identification for a referee?

  1. Name and number (the number has no restrictions)
  2. Only a number, which must be between 1 and 4 alpha-numeric digits
  3. Only a number, which may contain letters and symbols
  4. Name and no numberCould not connect : The server requested authentication method unknown to the client