3V0-25.25 tests advanced VCF networking, NSX-T configurations, SDDC architecture, and troubleshooting design scenarios, not basic concepts. I failed my first attempt after relying on random PDFs and old blog notes, and had no idea which domains actually cost me the most points.
Before my retake, a colleague suggested CertBoosters. The practice questions matched the real exam structure closely and cleared up my weak spots on NSX-T policy design. Passed on the retake three weeks later. Sharing in case it helps someone else prepping for this.