Hi,

Yes,you can take the certification with full confidence.
Suggesting you to make some notes after each class with focus on basic concepts eg. various daemons running in a cluster, individual responsible for individual operations, various phase in map-reduce jobs etc.
This will give you quick help in last minute review and attempt the certification.
The focus of certification is more on concepts and not on exact API names, so prepare well with solid conceptual knowledge.

The goal should be to prepare for the cloudera certification. Most of the concepts that are discussed in the training sessions align with what is expected to take the test.

You should practice more and if you practice enough you should be good for the certification.