15 Best Diagnostics Courses on Udemy
We compared 15 Diagnostics courses currently listed on Udemy, priced from $19.99 to $199.99. 12 of them teach the subject directly and 3 are built around a certification exam. They are ordered by our CourseAsk score, which is built from how thoroughly each course describes what it teaches, whether it comes from a named institution, and how it compares on price — not from star ratings, which our course data does not include.
- Courses compared
- 15
- Price range
- $19.99 – $199.99
- Providers
- Udemy
- Last updated
- 5 Sep 2026
How these 15 courses were chosen
Every course below is a real, currently listed course from Udemy, matched to "diagnostics" by our catalog and ordered by our CourseAsk score. Courses whose own title names the topic rank above those only tagged with it.
The grade on each entry scores how much the provider publishes about the course before you pay — the length and detail of the description, whether it lists learning outcomes and objectives — and whether a named university or institution stands behind it. A is fully documented and institution-backed; E is little more than a title and a price. Courses with almost nothing published are left ungraded rather than marked down, because an unknown course and a poor one are not the same thing.
There are no star ratings on this page — the course feeds we license do not include them, and we would rather leave a column out than fill it with a number we cannot stand behind. What we do have is price: these range from $19.99 to $199.99, as listed by the provider when we last updated the page.
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1
FortiSwitch 7.2 (NSE6_FSW-7.2) Tests (FEB 2026)
This comprehensive practice test is designed to fully prepare you for the Fortinet NSE6_FSW-7.2 FortiSwitch Specialist certification exam by offering a realistic and challenging exam-like environment. FortiSwitch is a ke...
$19.99listed price -
2
Cisco Certified Support Technician (CCST) Networking
Step into the world of networking with our Cisco Certified Support Technician (CCST) Networking course. Designed for entry-level network technicians, students, and interns, this comprehensive program equips you with the...
$24.99listed price -
3
Simulation Examen : CompTIA A+ Core 1 (220-1201)
Préparez-vous efficacement à l’examen CompTIA A+ Core 1 (220-1201) grâce à un simulateur composé exclusivement de QCM réalistes, conçus pour refléter fidèlement la difficulté, la logique et les scénarios rencontrés lors...
$19.99listed price -
4
Certified Prompt Engineer for Healthcare & Medical AI (PEHM)
As the intersection of healthcare and artificial intelligence continues to expand, the demand for skilled professionals capable of navigating and mastering this dynamic field has never been more critical. This course off...
$199.99listed price -
5
Biotechnology & Molecular Biology: Next-Gen Biotech 2026
Unlock the Biological Revolution: Master Biochemistry, Molecular Biology, and Next-Gen Gene Editing in a Single, Comprehensive Course.Biotechnology is transforming the world at an unprecedented pace. From engineering lif...
$19.99listed price -
6
1Z0-1060-26 Oracle Accounting Hub Cloud 2026 Imp. Prof. Prep
Practice exam covers a comprehensive set of topics related to transaction processing, configuration, management, and security. Here's a refined overview:1. Transaction Type Life Cycle:• Analyze and identify the life cycl...
$19.99listed price -
7
Cisco 350-401 : Cisco CCNP Enterprise ENCOR Test
This is Cisco 350-401 : Cisco CCNP Enterprise ENCOR Practice Test. These mock tests will help you in preparation for the Cisco 350-401 : Cisco CCNP Enterprise ENCOR actual exam.Applied knowledge and skills in the followi...
$19.99listed price -
8
PLC Ladder - HMI Wincc - Tia Portal Siemens Step7 1200 1500
Benvenuto al corso "PLC Ladder - HMI Wincc - Tia Portal Siemens Step7 1200 1500"! Questo corso è progettato per chiunque desideri diventare un esperto nella programmazione e gestione di PLC Siemens, utilizzando TIA Porta...
$199.99listed price -
9
Automotive Starting System Diagnosis and Schematic Analysis
This course explains everything about the starting system operation and wiring diagrams analysis. Every Do-It-Yourselfer, Automotive students, Mechanics and Auto Electricians can use the information provided in this cour...
$24.99listed price -
10
Advanced Windows Performance Troubleshooting
How To Fix a Windows Slow Boot in 10 minutes With This Proven Technique?A few years ago, I was working as a s...
$49.99listed price -
11
Lunch-n-Learn Series: Azure VM Scale Sets
Welcome to Lunch-n-Learn: Azure VM Scale Sets, a specialized crash course designed for corporate IT professionals who are looking to quickly deepen their understanding of Azure VM Scale Sets. What You Will Learn:INTRODUC...
$19.99listed price -
12
ELISA Mastery: From Lab Beginner to Diagnostic Expert
if you want to work in a laboratory, understand diagnostic testing, or build a strong foundation in immunology-based assays, this course is designed for you.ELISA (Enzyme-Linked Immunosorbent Assay) is one of the most wi...
$109.99listed price -
13
![Fortinet NSE4_FGT-7.2 Exam Preparation [ 2024 ]](https://i.udemycdn.com/course/480x270/5809352_b157_3.jpg)
Fortinet NSE4_FGT-7.2 Exam Preparation [ 2024 ]
Welcome To The Network Security Engineer 4 [ NSE4 7.2 ] Practice Tests, The Final Exam preparation.Fortinet is one of the leading companies in the world with thousands of customers globally and rated highly by analysts....
$19.99listed price -
14
AZ-204 Developing Solutions for Microsoft Azure QA Updated
Welcome to Exam AZ-204 Developing Solutions for Microsoft Azure Practice TestsGet Practice Tests Verified Questions Answers including Hotspot , Drag drop and Case study with full explanations As a candidate for this exam...
$29.99listed price -
15
Desafio AZ-700: Simulado para Microsoft Azure Network
Desafio AZ-700: Simulado para Microsoft Azure NetworkO Desafio AZ-700 é um simulado abrangente projetado para profissionais de TI e especialistas em nuvem que desejam aprofundar seus conhecimentos e habilidades na criaçã...
$34.99listed price
Best Diagnostics Courses on Udemy compared
Prices shown are the provider's listed price when we last updated this page. Confirm on their site before enrolling.
What the prices here tell you
The 15 priced courses on this page run from $19.99 to $199.99, with the middle of the range around $24.99 — a spread of $180.00. That is a wide gap for one subject. A higher price on this page usually reflects who is behind the course rather than how much material it contains, so it is worth opening two or three at different price points and comparing their syllabus before deciding.
Who is behind these courses
These courses come from Udemy. Everything on this page is sold on the one platform, so the buying experience is the same whichever you pick.
Courses versus exam preparation
3 of the entries here are built around a certification exam rather than teaching Diagnostics from scratch. They are the right choice only if you already know the material and want to pass a specific exam; if you are starting out, pick one of the taught courses first and come back to exam preparation afterwards.
Before you enrol
Open the provider’s own page and check three things this comparison cannot tell you: when the course was last updated, what the syllabus actually covers in its later sections, and what recent learners say. Prices shown here are the provider’s listed price when we last rebuilt this page on 5 September 2026 — they change often, and a promotion can move them substantially. We earn a commission if you enrol through our links, which costs you nothing and never affects the order courses appear in.