AZ-300 vs AZ-305 - confused about which path to take for Azure Solutions Architect
I started studying for AZ-300 a few months ago and then discovered it was retired and replaced by AZ-305 as part of the redesigned Azure certifications path. Now I'm trying to figure out if my AZ-300 study materials are still useful or if I need to basically start over with fresh material.
My current situation: I have AZ-104 and AZ-204 already. I've been in Azure for about 4 years professionally, mostly on the infrastructure and networking side. My practice test scores on AZ-300 materials were running around 73-76%, but I know some of that content doesn't map cleanly to AZ-305.
The biggest structural change I've noticed is that AZ-305 leans much harder into design decision reasoning - it's not just 'can you configure this service' but 'given these business constraints, why would you choose this architecture over three alternatives.' That feels harder to cram for than configuration recall.
Is there anyone who studied for AZ-300 and pivoted to AZ-305, or who went directly to AZ-305? I'm trying to figure out how much of my existing prep work transfers and how many additional weeks I need to add to my timeline. Currently targeting about 8 more weeks of study at roughly 90 minutes a day.
The 'why this architecture' questions have a specific logic to them that takes practice to internalize. Get familiar with the Azure Well-Architected Framework pillars because the exam uses that framework as the lens for almost every design decision question. Once you see the pattern, it becomes more predictable.
John Savill's AZ-305 study series is the most current resource I've found - he specifically addresses what changed from the 300 path. Don't rely on Udemy courses that haven't been updated since 2023, there are still a lot of them teaching retired content.
About 60-65% of AZ-300 content transfers to AZ-305 in my estimate. The core Azure services knowledge is still valid - what changes is the question format and the emphasis on justification over configuration. With your 104 and 204 base, 8 weeks at 90 min/day is realistic if you focus specifically on design scenario question types.
With 4 years of Azure infrastructure experience you're in a strong position. The exam rewards people who can connect service selection to cost, compliance, and reliability tradeoffs - that's real-world reasoning, not memorization. Your experience is worth more than extra study hours at this point.