@AsishSamanta what we need to know is what type of certification are you looking for?
If you want full site and configuration access, then you should sign up for the Certified Professional - Expense Configuration. This certification will follow you no matter what company you work for. You must pass the exam with either 70 or 75%.
I believe you can send an email to: firstname.lastname@example.org to ask about this training.
If you do not want full site access, but just the configuration basics, then sign up for the Associate Certification.