Resolved: It would be better if you put the practice exam under the 4th part of this course.
It is not possible to pass the exam without doing the 4th part (Practical exercise). All the info in 3rd part is explained in a simple way without challenging exercises. However, part 4 shows the implementation of the learned material in a real-life example. So, 2 questions in the Practice exam are not possible to solve if you have no prior knowledge in terms of practical implementation of these functions or if you did not watch part 4.