Test questions at 2 module are based on information, which is not provided at module information, only additional source. But there is no active link to that as well. In case if info would be included into course, it would make more sense to make a test based on that info.

The quiz for the 1st and 2nd module had a few questions that need information that wasn't included in the previews readings.

the content could be enriched with more explanatory videos.

I appreciated that most of the content was reading-based, rather than video-based. However, many of the links for the readings/resources were absent or broken. Additionally, the quiz for the first two modules covered topics not discussed at all in those two modules (decision trees and regression) or anywhere in the course, unless the missing content was in the broken links that I could not access.

1st Quiz didn't reflect the materials covered

Information on the decision tree is not included - However is part of the quiz.