Hi Abdul,
Please find the answers:
1) Which module I should take SAP MM or SAP SD?
Both modules are good, but based on your experience in purchasing, I would suggets you to go ahead with SAP MM, as you will understand most of it and will be able to correlate with your previous worl
2) Which module will have good career for me?
Both modules have great opportunity. If you check any job forums, you will find multiple jobs for both
3) Is their Job Market available for above Modules?
If yes,How should I start apply for it?
You can simply search for jobs on any job site for SAP MM or SAP SD, and you will find huge lists for both in small as well as MNCs. As you dont have SAP idea of the modules, you must wait and learn SAP before you apply for such jobs.
4) How should I study and pass SAP Certification?
You take any good coaching class for SAP and they will guide you. Mostly, both modules will need a month of classroom training, and approx a month of self study and practice.
5) Is Certification Important?
As you are fresher to SAP field, you will find very few jobs without certification. If you have some job where you are working on SAP for a couple of years, certification will not be needed, but for MNCs, to start as a fresher in SAP, you need to have certificate.
Regards
Vivek Singh