Exam prep · Free exam prep course
A complete course for the AWS Certified Cloud Practitioner (CLF-C02) exam. It follows the four exam domains in a teaching order: cloud concepts, the Well-Architected Framework, global infrastructure and the ways to reach AWS, then compute, storage, databases, networking and the AI/ML and management services. From there it covers cloud economics and migration, the shared responsibility model, compliance and logging, IAM, the security services, and finally pricing models, billing tools and support plans. Cards are weighted to the official domain percentages (24, 30, 34 and 12), not spread evenly, and the last unit drills look-alike services that candidates mix up. The cards are recall practice for the exam's definitions and service matchups: they are not a lab, so you will not build anything in AWS here. This course is unofficial and is not affiliated with or endorsed by Amazon Web Services. AWS is a trademark of Amazon.com, Inc. or its affiliates.
| Exam code | CLF-C02 |
|---|---|
| Questions | 65 (50 scored, 15 unscored), multiple choice and multiple response |
| Time | 90 minutes |
| Passing score | 700 on a scale of 100 to 1,000 |
| Cloud Concepts | 24% |
| Security and Compliance | 30% |
| Cloud Technology and Services | 34% |
| Billing, Pricing and Support | 12% |
Source: AWS, Certified Cloud Practitioner certification page and CLF-C02 exam guide (aws.amazon.com/certification), read November 3, 2026.
Copied straight from the course. In the app, each wrong option also gets its own explanation.
Card 1A startup avoids buying servers and pays by the hour for what it uses. Which advantage is this?
Trade fixed expense for variable expense. Paying hourly instead of buying hardware swaps fixed upfront spending for usage-based spending.
Card 2At which level does a network ACL filter traffic?
Subnet. A network ACL controls traffic entering and leaving a subnet. Security groups work at the instance level.
Card 3Which AWS storage service stores data as objects inside buckets?
Amazon S3. S3 is object storage; an object is a file plus its metadata.
Card 4A team wants continuous threat detection for suspicious activity in its AWS account. Which service fits?
Amazon GuardDuty. GuardDuty watches for malicious or unauthorized activity; the others do vulnerabilities, data discovery or DDoS defense.
Card 5Which identity is created with the AWS account and has complete access to all resources?
The root user. Root has complete access, so use it rarely.
Card 6Which EC2 purchasing option has no upfront payment and no long-term commitment?
On-Demand. On-Demand is pay as you go.
Card 7Who is responsible? Hardware refresh cycles for the servers in an AWS data center.
AWS. AWS owns and refreshes the physical hardware.
Card 8Which AWS Support plan is included for all customers at no charge?
Basic Support. Basic Support is automatic and free for every AWS account.
Encodr is a friendly, game-like flashcard app. Spaced repetition schedules every review for you, and the rest keeps you coming back.
Study a little each day to build a streak. A streak freeze forgives a missed day.
Small goals each day, like finishing a set, with a little celebration when you clear one.
Sessions come in bite-size sets of 15 to 25 answers, so there is always a natural place to stop.
Earn XP and level up, then see friends on a daily leaderboard and send them a nudge.
Yes. Create a free Encodr account and all 17 units and 1,302 cards are yours to study, with spaced repetition scheduling your reviews. The exam itself has a fee paid to AWS.
The four CLF-C02 domains: Cloud Concepts (24%), Security and Compliance (30%), Cloud Technology and Services (34%) and Billing, Pricing and Support (12%). The cards are weighted to match those percentages.
No. The cards are recall practice for definitions, service matchups and exam scenarios. They are not a lab and do not use the AWS console, so pair them with the free tier or AWS training if you want hands-on experience.
No. The course is unofficial and is not affiliated with or endorsed by Amazon Web Services. AWS is a trademark of Amazon.com, Inc. or its affiliates. Each card lists the public AWS documentation or whitepaper it draws on.