If this is a requirement for the data science certificate, the completion rate is sure to be abysmal. It is not a way to learn R at all, but probably a way for someone versed in R to get the certificate. I am not unexperienced in programming, but found the exams impossible to do, so disconnected from the lectures. This course alone is a full-time job for anyone who takes it without already being an accomplished programmer. If it is so critical to becoming a data scientist, perhaps two or more courses in it, might be needed. But whomever designed the course seems to be oblivious as to how incomprehensible the presentation and exams are to all but experienced programmers.