This is a very good resource for Series 27 exam facts!  At http://www.examfacts.com they have an excellent study guide filled with basic exam facts for the Series 27 exam.  The book is also available at Amazon.com
 

Example Questions from the Exam Facts 27 Book:
 

Define subordinated debt

1) Included in Net Cap if BROKER / DEALER approved by FINRA and SEC

2) Next-to-last to be paid in the event of failure.

3) Structure of Loan must be approved

What is the formula for total available capital?

Total Available Capital = Adjustment Net Worth + Subordinated Loans

What is the formula for total tentative net capital?

Tentative Net Capital = Total Available Capital – Non-Allowable Assets

What is the tentative net capital?

Also known as Net Capital Before Haircuts

Define Haircut

1) Discount securities from full market value

2) Compensate for market price losses in liquidation

What is the advanced formula for net capital?

Net Capital = Tentative Net Capital - Haircuts on Securities Positions