I passed GoogleCloud Certified Professional Cloud Architect Exam.
A big thankyou to Linux Academy in genral and Instructor Mathew in particular for designing a holistic course.
I will recommend others to follow every lecture carefully, try Hands-on and especially follow the links that is Google Cloud Documentations (that is provided in the lecture). Lecture covers Google Cloud services and products nicely they are must, don't skip them.
Case Studies should be studied thoroughly because I got more than 2 case studies. Exam questions cover the Cloud services and products, so try to cover as much as possible. Practice questions and Quizzes on Linux Academy are very helpful (again they are a must).
Try Google's Practice Exam for Professional Cloud Architect very helpful. I would request Linux Academy to increase number of practice questions for more practice.