Hi Pavan and welcome to the forums and the awesme world of flying
Bungee posted a great link there and the specifics on the student licence are :
Basically, there are no exams for the SPL but you will need to pass the BAK theory exam set by your flying school before you can go for the GFPT flight test. They may also have other pre-solo and pre-area solo exams for you too.
As Bungee mentioned, from the 4th of December the licencing laws are changing and the old "GFPT" will then be known as a "Recreational Pilot Licence" or RPL. The BAK theory exam will become the "RPL Theory Exam" but CASA has inferred this RPL theory exam will still be set by the flying schools just like the old BAK. We are still waiting on concrete confirmation of that.
The old SPL will also change to a "Student Pilot Certificate". Don't worry though. Any qualifications you have will carry over into the new system so you shouldn't lose any privileges once the changeover occurs. That means you can keep on with your training for now.
Happy landings and happy studying!
Cheers,
Rich