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CLF-C02 domain weights at a glance
| Scored domain | Share of scored content | Study priority |
|---|---|---|
| Cloud Technology and Services | 34% | Highest: learn core service purposes and cloud infrastructure concepts. |
| Security and Compliance | 30% | Second: practice identifying responsibility and security roles in scenarios. |
| Cloud Concepts | 24% | Third: connect cloud benefits, adoption, architecture, and economics. |
| Billing, Pricing, and Support | 12% | Smallest share, but still a scored domain; learn cost and support distinctions. |
These weights are listed in AWS’s CLF-C02 Exam Guide. Use them to allocate study time, not to skip a domain or assume an exact number of questions.
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Domain 1: Cloud Concepts (24%)
Study why organizations adopt cloud services and how AWS describes their value. The goal is to recognize what a concept helps an organization achieve, rather than memorize isolated phrases.
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Cloud value and architecture
- Know the benefits of AWS Cloud, including global infrastructure, global reach, speed of deployment, high availability, elasticity, and agility.
- Learn the six pillars of the AWS Well-Architected Framework: operational excellence, security, reliability, performance efficiency, cost optimization, and sustainability.
- Understand cloud migration and adoption strategies, along with concepts from the AWS Cloud Adoption Framework.
For example, elasticity means resources can adapt to changing demand; rightsizing means aligning capacity with actual needs. Both connect a technical choice to a practical outcome.
#1 Best Overall
Cloud economics
- Distinguish fixed costs from variable costs and account for the costs of operating on-premises infrastructure.
- Understand the difference between bringing your own software license and using included licenses.
- Know how rightsizing, automation, and economies of scale relate to cost and operational efficiency.
AWS’s Cloud Concepts domain page provides the official domain outline. Treat these topics as connected ideas: a cloud choice may affect operating costs, deployment speed, and the way an organization manages change.
Domain 2: Security and Compliance (30%)
The central skill is applying the shared responsibility model to a scenario. Running a workload in AWS does not mean AWS takes over every security task; responsibilities are divided and the division depends in part on the service being used.
Rank #2
- Long-term Memory Retention than Studying Directly Out of a Textbook
- Self-checking with Drills and Q/A
- Pocket-sized, Color Coded, Rounded Corners, Clear, and Bold Letterings
- Easy to Carry Anywhere.
Apply shared responsibility
- Identify AWS responsibilities, customer responsibilities, and areas where duties are shared.
- Be ready to explain how the split changes across services. AWS’s guide uses Amazon EC2, Amazon RDS, and AWS Lambda as examples.
- When reading a scenario, ask which party controls the relevant layer or configuration instead of assuming the answer is always AWS or always the customer.
Recognize security capabilities
- Review security, governance, and compliance concepts.
- Understand access-management capabilities and the purpose of security components and resources.
- Practice recognizing which capability addresses the stated need; focus on the role it serves rather than detailed implementation.
See AWS’s Security and Compliance domain page and the task statements in the exam guide for the official scope.
Domain 3: Cloud Technology and Services (34%)
This is the largest domain. Prepare to recognize how AWS services and infrastructure concepts fit common needs. The exam guide calls for foundational familiarity; it does not make a memorized catalog a guarantee of the questions you will see.
Provisioning, access, and infrastructure
- Know the ways to provision and access AWS services: the AWS Management Console, APIs, SDKs, command-line interface (CLI), and infrastructure as code.
- Distinguish a one-time manual operation from a repeatable, automated process.
- Understand the relationship among AWS Regions, Availability Zones, and edge locations.
- Know why an organization might use multiple Availability Zones or Regions for high availability, disaster recovery, business continuity, latency, or data sovereignty.
Compute: choose by workload shape
Recognize the kinds of needs represented by these examples, rather than treating them as interchangeable compute options:
- Amazon EC2 for virtual servers and configurable computing capacity.
- AWS Elastic Beanstalk for deploying and managing applications without managing every underlying detail directly.
- Amazon Lightsail for simpler, bundled virtual private server needs.
- AWS Batch for batch-computing workloads.
- AWS Outposts for AWS infrastructure and services in an on-premises location.
Databases: distinguish data needs
Learn the broad database role associated with each example:
Rank #4
- Amazon RDS and Amazon Aurora: managed relational database needs.
- Amazon DynamoDB: managed key-value and NoSQL use cases.
- Amazon ElastiCache: in-memory caching.
- Amazon DocumentDB: document database workloads.
- Amazon Neptune: graph database workloads.
Networking and content delivery
- Amazon VPC provides a logically isolated network environment.
- Amazon Route 53 supports DNS and domain routing needs; Amazon CloudFront delivers content through a global edge network.
- AWS Direct Connect and AWS Site-to-Site VPN address connectivity between networks and AWS, using different connection approaches.
- AWS Transit Gateway connects multiple networks through a central hub; AWS PrivateLink provides private connectivity to supported services.
- Amazon API Gateway supports creating and managing APIs.
Storage: match the storage type to the job
- Amazon S3 is object storage; Amazon EBS provides block storage for use with compute instances.
- EC2 instance store is temporary instance-attached storage, while Amazon EFS and Amazon FSx provide file-system options.
- Amazon S3 storage classes include archival choices for data accessed less frequently.
- AWS Storage Gateway supports hybrid storage scenarios between on-premises environments and AWS.
AI, machine learning, and analytics
- Recognize Amazon SageMaker AI as a service for building, training, and deploying machine-learning models, and Amazon Lex for conversational interfaces.
- Know the broad analytics roles of Amazon Athena (querying data), Amazon Kinesis (streaming data), AWS Glue (data integration), and Amazon QuickSight (business intelligence and visualization).
Other service categories
Be familiar with the purpose of services in messaging and workflow, business applications, support, developer tools, end-user computing, frontend and mobile development, and the Internet of Things. The exam guide and AWS’s in-scope services list offer examples to orient your review.
AWS says the in-scope services list is non-exhaustive and subject to change. Its technology and concepts list is also non-exhaustive, and the exam guide says its content outline is not comprehensive. Learn service purpose and scenario fit; do not assume those lists promise every possible topic or rule out anything not named.
Best Value
Domain 4: Billing, Pricing, and Support (12%)
Study how cost choices, billing tools, and support resources help meet different workload and business needs. Focus on the distinction between options, not on memorizing a single “cheapest” choice without a scenario.
Compare compute purchase options
- Review On-Demand, Reserved Instances, Spot Instances, Savings Plans, Dedicated Hosts, Dedicated Instances, and Capacity Reservations.
- Compare commitment and payment patterns, workload duration and predictability, flexibility, and whether capacity needs to be reserved or isolated.
- Understand Reserved Instance flexibility and how AWS Organizations can affect sharing behavior.
Storage, data transfer, and cost visibility
- Know that storage options and tiers differ, and learn how to choose based on the workload and access pattern.
- Understand inbound versus outbound data transfer cost examples; direction and location matter when interpreting a billing scenario.
- Recognize billing, budget, and cost-management resources as tools for visibility and cost control.
Support and technical resources
Learn the purpose of AWS technical resources and support options, then connect the choice to the type of help a customer needs. Use AWS’s Billing, Pricing, and Support domain page alongside the current exam guide for the official task statements.
How to prepare from the outline
- Read the current exam guide. Map its task statements to the four domains and mark unfamiliar concepts rather than beginning with an unstructured service list.
- Try official exam-style questions. Use missed questions to identify whether the gap is terminology, service purpose, or scenario reasoning.
- Fill targeted gaps with learning resources. AWS says a specific training course is not required; Skill Builder resources can help with foundational areas that need more practice.
- Take practice questions and a practice exam. Use the results to revisit weak areas, giving greater review time to the 34% and 30% domains while retaining coverage of all four.
AWS’s preparation guidance is available at Getting started with AWS Certified Cloud Practitioner. That post was published in 2023, so verify the current availability and subscription terms of any named learning resource before relying on them.
How the CLF-C02 score works
AWS reports a scaled score from 100 to 1,000, with 700 as the minimum passing score. The exam uses compensatory scoring: candidates need to pass the overall exam, not achieve a separate passing score in every domain. A weaker area can therefore be offset by stronger performance elsewhere, but the domain weights make broad preparation more useful than relying on a single strength. AWS states this in the official exam guide.
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