I spent two weeks agonizing over which cloud certification to get first. I read comparison articles, asked on Reddit, polled my coworkers. Then I realized my company runs everything on Azure, which made the decision for me in about three seconds.
Most people overthink this. Here’s how to not.
The Three Entry-Level Certs, Side by Side
| CLF-C02 (AWS) | AZ-900 (Azure) | GCP-CDL (Google Cloud) | |
|---|---|---|---|
| Questions | 65 | 50 | 55 |
| Time | 90 min | 45 min | 120 min |
| Cost | $100 | ~$99 (often free via MS events) | $125 |
| Pass score | 700/1000 | 700/1000 | ~70% |
| Validity | 3 years | Never expires | 2 years |
| Study time | ~25 hours | ~15 hours | ~30 hours |
Those numbers tell most of the story. AZ-900 is the shortest exam, the cheapest (frequently free), requires the least study time, and never expires. CLF-C02 is the most recognized name in cloud certifications but takes longer and costs more. GCP-CDL requires the most investment for the smallest market share payoff.
Check Your Job Posting First
Before you compare pass scores and study hours, go look at what your employer uses.
If your company runs on AWS, get CLF-C02. If it’s Azure, get AZ-900. If it’s Google Cloud, get GCP-CDL. This isn’t complicated. The cert that matches your daily work environment will be easier to study for (you already know the console), more immediately useful (you can apply concepts tomorrow), and more visible to your manager (who cares about the cloud you’re actually using).
If your company uses multiple clouds, or if you’re job hunting and not locked into one ecosystem, keep reading.
AZ-900: The Fast Track
AZ-900 is 15 hours of study and a 45-minute exam. You can realistically go from zero to certified in two weeks of casual evening study.
Microsoft runs free training events (“Microsoft Azure Virtual Training Days”) that include a free exam voucher at the end. The events happen regularly. If you time it right, this cert costs you nothing but time.
The exam covers cloud concepts, Azure services, security, privacy, pricing, and support. It’s broad and shallow — exactly what a fundamentals cert should be. 50 questions, 700 pass score, and it never expires. You pass it once and it’s on your resume permanently. No renewal fees, no recertification exam, no annual assessment.
The downside: AZ-900 carries less weight in AWS-dominated job markets. If every posting you see asks for AWS experience, an Azure fundamentals cert won’t move the needle much. It proves you understand cloud concepts generally, but it doesn’t prove you know the specific cloud the employer uses.
CLF-C02: The Most Recognized
AWS Cloud Practitioner is the default “first cloud cert” for a reason. AWS holds the largest market share among cloud providers, and CLF-C02 is the most widely recognized entry-level cloud certification.
The exam is 65 questions in 90 minutes — more questions and more time than AZ-900, which reflects slightly deeper coverage. The domains are Cloud Concepts (24%), Security and Compliance (30%), Cloud Technology and Services (34%), and Billing, Pricing, and Support (12%). Security is the largest domain — don’t skim it.
At $100 and about 25 study hours, it’s a moderate investment. Validity is 3 years with unlimited retake attempts (14-day wait between attempts). If you fail, you can try again in two weeks. The stakes per attempt are low.
CLF-C02 is the right choice if you’re targeting AWS roles specifically, or if you want the cert with the broadest name recognition across the industry. It’s also a natural stepping stone to SAA-C03 (Solutions Architect Associate), which is the most popular associate-level cert in cloud.
GCP-CDL: The Niche Pick
Google Cloud Digital Leader is the least common starting point, and honestly, that’s fine. GCP has a smaller market footprint than AWS or Azure. If you’re not working at a company that uses Google Cloud, there are fewer reasons to start here.
The exam is 55 questions in 120 minutes — the most generous time allowance of the three at over 2 minutes per question. Cost is $125, the most expensive entry-level option. Study time is around 30 hours, also the most.
Pick GCP-CDL if your company is a Google Cloud shop, if you’re targeting roles at companies known for GCP usage, or if you specifically want to work with Google’s data and ML services (which are genuinely strong). Otherwise, start with AWS or Azure and add GCP later.
Should You Skip the Fundamentals Entirely?
Maybe. It depends on where you’re coming from.
Skip the fundamentals if you have 6+ months of hands-on cloud experience. If you’ve deployed EC2 instances, configured VPCs, set up IAM roles, and debugged CloudWatch logs, CLF-C02 will bore you. Go straight to SAA-C03 ($150, ~50 study hours, 720 pass score). The associate exam covers everything in the foundational exam plus actual architecture and design. You’re not skipping content — you’re skipping the easier version of the same content.
Same logic applies to Azure. If you’ve been managing Azure resources through the portal or CLI for months, skip AZ-900 and go to AZ-104 (Azure Administrator, ~50 study hours). Though with AZ-900 being free and never-expiring, it’s still worth grabbing even if you could pass AZ-104 directly. Fifteen hours for a permanent credential is hard to argue against.
Don’t skip if you’re switching careers into cloud, coming from a non-technical role, or have zero hands-on cloud experience. The fundamentals exams exist for a reason. They build a vocabulary — regions, availability zones, IaaS vs. PaaS vs. SaaS, shared responsibility model — that every higher-level exam assumes you already know. Trying to learn this vocabulary while also learning architecture patterns is a recipe for confusion.
The Budget Angle
Exams cost money. Failed attempts cost more money.
AZ-900 at $0 (with a free voucher) is the obvious winner if budget matters. CLF-C02 at $100 is reasonable. GCP-CDL at $125 is the priciest.
But exam fees aren’t the only cost. Study materials matter too. Free resources exist for all three — AWS Skill Builder, Microsoft Learn, and Google Cloud Skills Boost all offer free training for their respective fundamentals exams. Third-party courses and practice exams add $20–$50 typically.
If you fail, retake policies differ. AWS lets you retake after 14 days with no limit on attempts. Microsoft requires a 24-hour wait after the first failure, then 14 days for subsequent attempts, with a maximum of 5 attempts per exam in 12 months. AWS is more forgiving here.
My Actual Recommendation
If you have no strong preference and just want to get started: take AZ-900.
It’s the fastest path to a cloud certification. It’s frequently free. It never expires. And it teaches the same foundational concepts — virtualization, storage types, networking basics, identity management, pricing models — that apply regardless of which cloud you use next.
After AZ-900, you can go deeper into Azure (AZ-104 → AZ-305) or pivot to AWS (CLF-C02 or SAA-C03 directly). The fundamentals transfer. Cloud concepts are cloud concepts — the services have different names, but the patterns are the same.
If your company is an AWS shop, skip this advice and get CLF-C02. Matching your cert to your workplace always beats a generic recommendation.
If you want to see how the certifications connect beyond the entry level, the full certification roadmap maps every path across all three clouds. And if you’re torn between AWS and Azure specifically, here’s a direct comparison.
One More Thing
Don’t spend three months deciding. The difference between these three certs is measured in weeks of study time and a few dollars. The difference between having a cert and not having one is measured in interview callbacks.
Pick one. Start studying tonight. Take the exam in 3–6 weeks. You can always get another cert later. You can’t get back the months you spent researching which cert to get first.
