Hi Mohan,
as you can see on the certification site ( E_HANAAW141 - SAP Certified Development Specialist (Edition 2014) - ABAP for SAP HANA | SAP Training and Certif…)
it is recommended to participate in the H100, HA300 and HA400 courses. The most important one is the HA400 here, but you should then have knowloedge in SAP HANA basisc and architecture.
In the future there will also be the openSAP course ABAP for SAP HANA Development but it will still be recommended to take the training courses.
Cheers
Jens