Hi Dhanya,

You can review the Exam Details in Learn >> Certifications section of this site in order to understand how you can prepare for the Associate Reactive Developer exam.

The zip-file also contains a Sample Exam so you can get an idea of what type of questions you can expect on the real exam.

I would recommend following the Becoming a Reactive Web Developer Guided Path since it pretty much covers all the topics.

Hope this helps!

Regards,

Nordin