Master Microsoft Azure Fundamentals: AZ-900 Exam Prep vs GRE Math Prep Course: The A–Z on GRE Math Topic by Topic

The course covers all AZ-900 exam domains across approximately 7.5 hours of video: cloud concepts (IaaS, PaaS, SaaS, CapEx vs. OpEx), core Azure architecture (regions, availability zones, resource groups), compute, networking, storage, databases, identity and access management, security and compliance, governance, and Azure pricing models. Matt Ouellette at Packet Pilot noted it "had well built demonstrations and labs to follow along with your free Azure account or built in labs" and "did a good job at giving you a high level overview of AZ-900." The course is updated for January 2026 exam revisions and includes Version 4.0 with re-mastered audio and updated slides. The primary content critique across sources is that 7.5 hours covers the breadth of the exam at a necessarily high level — every reviewer who mentioned it recommended pairing the course with Microsoft Learn or a dedicated practice-test package to fill the gaps the compressed runtime cannot cover in depth.

Scott Duffy is consistently described across all analyzed sources as a clear, approachable instructor who excels at making cloud concepts accessible to both technical and non-technical learners. Reddit user WayneH_nz called him "an AMAZING trainer." The Javarevisited article by javinpaul ranked Duffy's course first among AZ-900 options specifically because he "explains Azure cloud concepts in an easy-to-understand way" with "real-world examples, hands-on exercises, and quizzes." Shafath Ahmed on Medium wrote that Duffy "does a pretty good job explaining the Azure fundamental contents." No reviewer across the 26 opinions analyzed raised concerns about teaching quality, pacing, or clarity — the instructor dimension is the strongest scoring element of this course.

The course sells on Udemy during frequent sales for approximately $12–$15, which Reddit users across r/cscareerquestions, r/sysadmin, and r/AZURE cite as one of its key selling points. User The_Real_Tupac on Reddit noted "it regularly sells for $12," and user geekinuniform suggested "spending $12 for the Azure course" specifically to learn cloud terminology. For that price the course includes 7.5 hours of video, a 24-page PDF study guide, downloadable audio files for offline listening, slides, and a 50-question practice test — a bundle that multiple reviewers described as exceptional value at the sale price. Lifetime access and free updates that track exam revisions (including the January 2026 update) further strengthen the value proposition.

The course includes one 50-question practice test, which reviewers consistently describe as a useful baseline gauge but insufficient standalone exam preparation. Reddit user flam3throw3r from r/AzureCertification specifically recommended pairing it with Tutorials Dojo practice tests for more exam-representative questions. User extra_specticles on r/AZURE described watching the course first, then taking practice tests from an external source to identify weak areas. The cyber4noobs.com guide noted that optional lab add-ons are available separately but not included in the base course price. The practice material is proportionate to the course's 7.5-hour scope — it functions as orientation rather than the comprehensive drill-and-review system that Udemy's dedicated practice-test packages offer.

The AZ-900 is a fundamentals-tier exam with a passing threshold of 700/1000, and every reviewer who reported an outcome after using this course passed, many on their first attempt. Reddit user jpanda206 on r/AZURE studied for "about 3 weeks with Udemy and Microsoft Learn" and passed with a score of 790. Shafath Ahmed on Medium passed after approximately two weeks of preparation using Scott Duffy's course alongside Microsoft CLX and Microsoft Learn, completing the exam in 20 minutes of the allotted 45 and scoring above 90% on final practice runs. The cyber4noobs.com reviewer passed after one week of intensive daily study. No reviewer in the analyzed set failed after completing this course, though most credited a multi-resource approach rather than this course alone.

The course is a tightly-organised library of 240 worked GRE quant solutions across ~13 hours, taught topic by topic from the absolute basics up through harder material like probability. Reviewers consistently praise the clear, step-by-step breakdowns and the memorable mnemonic devices (the "Beyonce Rule" is the one people quote back). The recurring content caveat is that it is purely solution walkthroughs — there are no embedded original practice questions, so the "content" is teaching, not testing.

Olu Sanya is the strongest part of the package. A Morehouse/Georgia Tech Applied Physics and Electrical Engineering graduate with 14+ years of test-prep experience, he is repeatedly described as engaging, patient and good at making a nervous student feel math is learnable. His stated philosophy — "it's not difficult, you just don't know it yet" — shows up in the teaching, and the free 1-hour Skype session he offers is a rare personal touch at this price.

List price is around $70 but the course is almost always on sale in the $10-20 band with lifetime access, plus a free formula-sheet PDF and a bonus Skype session — genuinely cheap versus Magoosh, Manhattan or Target Test Prep. The honest deduction is that you are required to buy Barron's 6 GRE Practice Tests separately to actually use the videos, so the true out-of-pocket cost is higher than the headline, and independent reviewers note Barron's is not the best-regarded practice source.

The weakest dimension by a wide margin and the one every critical source agrees on. The course contains no independent practice questions, no quizzes and no full-length tests — it is built entirely around explaining problems from an external Barron's book you must purchase yourself. BrightLink Prep is blunt that "there are no practice exercises crucial to forming a solid understanding," and points out Barron's is a questionable choice versus official ETS material.

Learners credit the method with building confidence and giving them concrete strategies for question types they previously froze on, and the topic-by-topic mastery approach maps well onto how GRE quant is structured. But because the course supplies no practice and no full-length mocks, score movement depends entirely on the learner doing the external Barron's (and ideally official ETS) practice on top — the videos teach the how, not the timed reps.