I suggest to postpone the exam preparation a little because now we are in the process of changing the exams, the content preparation guide and exam questions and new exam and resource will be available.
If this is not an option refer to this
info on exam preparation.
The info from Pluralsight videos are matching the exam contents (the developer related videos) and also the latest version of Nuts and Bolts book.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items