Hello Pooja.
I hope this message finds you well.
I already got the OutSystems Traditional Web Developer certification. In my opinion, you should do the Guided Paths of OutSystems in this link:
https://www.outsystems.com/training/paths/2/becoming-a-traditional-web-developer/
And try to study the theoryas well as possible. :)
Best Regards,
Paulo Russo.
www.paulorusso.pt