www.aviationinterviews.com
This is how I prepared and did well on the interview:
-How to Prepeare for Your CX Interview by CA's X, Y and Z.
-Flying the Big Jets by CA Davies.
-Illustrated Book of Aerodynamics by Skip Smith.
-Study of tropical WX patterns and particulars about typhoons, windshear, vulcanic ash and depressions.
-If you are American, study ICAO holdings, Metar and other peculiarities and differences.
-Knowledge of current airplane.
-Some knowledge of the 744 (if applying for NA cargo)
Good luck!