Practice test recommendations and study tips for GCP Professional Cloud Architect (PCA)

Hi everyone,
I'm currently preparing for the GCP Professional Cloud Architect (PCA) exam. I have almost completed Ranga Karanam's course so I’m looking for reliable practice test recommendations to gauge my readiness.
A few quick questions for those who have taken the exam:

1. Practice Tests: Which mock exam sets did you find most accurate to the actual test?
2. gcloud CLI: How heavily are specific gcloud commands tested compared to high-level architecture decisions?
3. Mock Test Strategy: What is your best tip for using practice exams to identify and fix weak spots?
   Thanks in advance for your help!