If you’re looking to take the Microsoft exams of DP-200 and DP-201, then you need to read this blog post carefully and study everything recommended in it.
It helped me to pass both tests with flying colors and, since the contents of both exams are similar, this one post will help you with both.
Also, I recommend taking DP-201 before taking DP-200.
Here’s a list of the skills and objectives measured on the DP-200 exam, taken from the official exam’s objectives. The percentages next to each objective area represent the number of questions that you will find in that area on the exam. Below each topic, you will find links to the resources that I have found helpful.