Just cleared Arch-303 after about 5 weeks of prep. Wanted to drop some notes since this sub helped me when I was stuck on the architecture scenario questions.
Biggest thing that tripped me up initially was the multi-org vs single-org design tradeoffs, the exam loves scenario questions where two answers look "correct" but one violates a governor limit or sharing model constraint you're supposed to catch. Spent extra time on data architecture and integration patterns because that's where I was weakest.
For practice questions, I ended up using a mix of Trailhead modules + ITExamsTopics for scenario-style practice sets, the explanations helped me understand why an answer was wrong, not just that it was.
Happy to answer specific questions if anyone's prepping right now. What topics are you all finding hardest?