Hi,
I want to get certification in spunk as a splunk admin and architect. I would like to know about the study material for self study. Are there any book or online material other than instructor led classes which can prepare me for certification??
You can make use of splunk docs, blogs and answers community. Exploring Splunk is also a good goto book available for free.
Please note that, you can't write any splunk certification exams without taking official training offered by Splunk. You can find more info about certification paths here.