Summary
Although the content of this book covers the entire recommended guide for the exam according to the official documentation, it is recommended to complement the preparation for the exam along with practical experience in GCP in order to obtain the greatest benefits.
The exam has no feedback (it just shows PASS or FAIL), so if you feel your knowledge of a particular service explained in the book is weak after answering these questions, I recommend you to go and read again the relevant chapter of this book in order to reinforce your preparation, underline key concepts and design, get hands-on experience, and try to imagine the best scenarios of where the services could fit in the development of cloud solutions.
I wish you the best of luck in your preparation for the Google Cloud Certified Professional Cloud Developer exam and with all your future designs and implementations of cloud-native solutions.