This is a very good resource for Series 55  exam facts!  At http://www.examfacts.com they have an excellent study guide filled with basic exam facts for the Series 55 exam.  The book is also available at Amazon.com

Example Questions from the Exam Facts 55 Book:

What type of securities is reported in CQS?  

CQS shows bid and ask quotes for exchange-listed equity securities! (if it says “stocks listed on Nasdaq” or “bonds listed on Toronto exchange” that would be the WRONG answer)

Who can use both ITS and CAES?

Only CQS market maker (third market maker)

Define .B

BUNCHED, indicating that the report is an aggregate of trades

Define .C

cash trade

Define .N

NEXT DAY, next day settlement as opposed to regular way settlement