Hello Srujay,
On training.sap.com page you will find the certification codes and there in topic areas of each the percentages and the course codes are given. Starting from the higher percentaged topics cover all books or guides to be ready.
C_HANATEC151 - SAP Certified Technology Associate - SAP HANA (Edition 2015)
C_HANASUP_1 - SAP Certified Support Associate - SAP HANA
Regards,
Yuksel AKCINAr