Hi Vikash,
It's good to know that you are getting some knowledge in ABAP. SAP MOBILITY is very hot technology in market now days. SAP ABAP knowledge would really helpful to understand SAP backend config and all.
As you mentioned you are given some assignment to work on front end. I'm sure nothing can be best than it.
Check it out :
http://scn.sap.com/thread/3406565
Rrgds,
Jitendra