In my opinion, going with a single source won’t cover the whole curriculum for the certification, such as video tutorials or practice exams itself cant give a holistic view of content that may appear on the exam day. Rather a combination of them would bolster the chance of covering the majority of the content. I have cleared my certification exam with an ensemble of these approaches so that one complements the other in helping the concepts seep into memory easily and we don’t need to stress much on memorizing the concepts.
Fourfold approach -
I started preparing for Solution Architect…

Data Scientist at Ascentt, Intrested in Machine learning, Data Science and AWS. Happy to connect and collaborate. LinkedIn : pruthvi-teja-anumandla