Hi James,
Yes I think you are right C_HANAIMP_11 is the HANA Application Associate exam!
I am also looking on how can I prepare and get ready for the exam.
Let us share any information we get here and keep this thread open as others may would also like to share their experience.
SAP PRESS is launching this book on the HANA Certification on 05/31/2016 https://www.sap-press.com/sap-hana-certification-guide_3859/ Thanks. Tanmoy