Is it possible to write the Kerala Psc main exams before writing the preliminary exams ?

[happylife]

I have some notifications in my profile page in that Kerala Psc website where i can apply for some jobs listed in it ...

And i have applied for a job in it for the first time ...

Now what happens ,

Would they give me an examination date and examination center ?

I thought i should take the preliminary exams first before applying for the jobs listed in it , and attempting exams for it ...

If anyone knows how this actually works ...

Please help ...