CLF-C02 Exam Format: Domains, Questions & Tips

Before you sit the AWS Certified Cloud Practitioner exam, it pays to understand exactly what you're walking into. Knowing the CLF-C02 exam format — how many questions, how they're scored, and which topics carry the most weight — lets you study smarter instead of just harder. This guide covers everything you need to know about the exam's structure so you can focus your energy where it counts.

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The Basics: What the CLF-C02 Exam Looks Like

The AWS Certified Cloud Practitioner (exam code CLF-C02) is AWS's foundational-level certification. It's designed to validate broad cloud literacy — not deep technical expertise — which makes it an excellent starting point whether you're new to cloud computing or a business professional working alongside technical teams.

Here's what to expect on test day:

The Unscored Question Catch

One detail that trips people up: 15 of the 65 questions are unscored. AWS uses these to gather data on potential future questions. The critical thing to know is that you cannot tell which questions are unscored — they look identical to the scored ones. The practical takeaway: treat every single question as if it counts, because you have no way of knowing which ones actually do.

How the Score Works

The 700 passing mark is a scaled score, not a raw percentage. Scaled scoring accounts for slight differences in difficulty between exam versions, so 700 doesn't mean "answered 70% correctly." You'll receive a score between 100 and 1000, and you need at least 700 to pass. You won't see a breakdown of which individual questions you got right or wrong — just your total scaled score and a performance summary by domain.

Question Types: Multiple-Choice and Multiple-Response

The CLF-C02 uses exactly two question formats:

Multiple-Choice

Multiple-Response

If you want to get a feel for how these questions are phrased before you dive into full study mode, try our free diagnostic quiz to see where you stand across all four domains.

The Four Domains and Their Weightings

The CLF-C02 syllabus is divided into four domains. Understanding the weightings helps you prioritise your study time — more weight means more questions, which means more impact on your score.

Domain 1: Cloud Concepts — 24%

This domain tests your understanding of why cloud computing exists and the foundational frameworks AWS uses. Key topics include:

• The six advantages of cloud computing: trading capital expense for variable expense, benefiting from economies of scale, stopping capacity guessing, increasing speed and agility, eliminating data centre running costs, and going global in minutes.
• The AWS Well-Architected Framework: built on exactly six pillars — Operational Excellence, Security, Reliability, Performance Efficiency, Cost Optimization, and Sustainability. (Don't let older study materials mislead you; Sustainability was added as the sixth pillar.)
• The AWS Cloud Adoption Framework (CAF): six perspectives — Business, People, Governance, Platform, Security, and Operations.
• Migration strategies (the 6 Rs): Rehost, Replatform, Repurchase, Refactor/Re-architect, Retire, and Retain. Focus on these six core strategies for the exam.

Domain 2: Security and Compliance — 30%

Security is the heaviest-weighted domain and deserves significant study time. Core topics:

• Shared Responsibility Model: AWS secures the cloud itself (hardware, Availability Zones, the hypervisor, the global network). You are responsible for what's in the cloud — operating system patches, application configuration, IAM policies, data encryption, security groups, and firewall rules.
• Key security services: CloudTrail (API call auditing — who did what, when, and from where), GuardDuty (ML-powered threat detection), Inspector (vulnerability scanning for EC2, containers, and Lambda), and AWS Shield (Standard is free and automatic; Advanced is paid and includes a DDoS Response Team).
• IAM fundamentals: users, groups, roles, and policies; principle of least privilege; MFA best practices — especially for the root account.

Domain 3: Cloud Technology and Services — 34%

The largest domain by weight covers AWS's core infrastructure and services:

• Global infrastructure: Regions (geographically isolated, each with two or more Availability Zones), Availability Zones (discrete data centres with redundant power and networking), and Edge Locations (used by CloudFront and Route 53 for low-latency content delivery — distinct from AZs and Regions).
• Compute: EC2 instance families (General Purpose, Compute Optimized, Memory Optimized, Storage Optimized, Accelerated Computing) and AWS Lambda (serverless, event-driven — no server management required).
• Databases: RDS (managed relational — MySQL, PostgreSQL, MariaDB, Oracle, SQL Server), Aurora (MySQL/PostgreSQL-compatible, cloud-native, up to 5× MySQL throughput), DynamoDB (fully managed serverless NoSQL — key-value and document), and Redshift (managed data warehouse for petabyte-scale SQL analytics).
• Storage: S3 storage classes, from Standard through Glacier Deep Archive, with Intelligent-Tiering handling automatic cost optimisation for unpredictable access patterns.

For a detailed breakdown of every service and concept tested in this domain, check out our exam guide.

Domain 4: Billing, Pricing, and Support — 12%

Smallest by weight but still worth understanding clearly:

• EC2 pricing models: On-Demand (flexible, no commitment), Spot Instances (unused capacity, steep discounts, 2-minute reclaim notice), Reserved Instances — Standard (highest discount, less flexible) and Convertible (moderate discount, changeable attributes), and Savings Plans — Compute (broadest flexibility, covers EC2, Lambda, and Fargate) and EC2 Instance (family-specific). Dedicated Hosts round out the options for compliance or licensing needs.
• Support plans: Basic (free), Developer, Business, Enterprise On-Ramp, and Enterprise. Business and Enterprise include 24/7 phone and chat support. Enterprise includes a dedicated Technical Account Manager (TAM).
• AWS Trusted Advisor: checks across five categories — Cost Optimization, Security, Fault Tolerance, Performance, and Service Limits. Core checks are available on all plans; the full suite requires Business or higher.

How to Use the Domain Weightings Strategically

A simple rule of thumb: allocate your study hours proportionally. Domain 3 (34%) and Domain 2 (30%) together account for nearly two-thirds of your score. That doesn't mean ignoring Domains 1 and 4, but it does mean you can't afford gaps in security knowledge or cloud technology fundamentals.

A few practical strategies:

1. Start with Domain 2. The Shared Responsibility Model underpins almost every security question and is also referenced in other domains.
2. Build a mental map of Domain 3 services. The exam loves to test which service solves which problem — especially the differences between RDS vs. DynamoDB, or CloudTrail vs. GuardDuty.
3. Don't neglect Domain 4. Pricing model questions are very predictable once you understand the use cases for each EC2 option.
4. Use timed practice to simulate the real thing. At 90 minutes for 65 questions, you have roughly 83 seconds per question — faster than it sounds when you're reading carefully. Regular timed practice with our practice questions will help you build the right pacing.

FAQ

How many questions are on the CLF-C02 exam?

There are 65 questions in total, but only 50 are scored. The remaining 15 are unscored research questions that look identical to scored ones — you won't know which is which, so treat every question as if it matters.

What is the passing score for the CLF-C02 exam?

You need a scaled score of 700 out of 1000. The scale runs from 100 to 1000, and the score is adjusted to account for slight variations in difficulty across exam versions — it's not a simple percentage of correct answers.

How long is the CLF-C02 exam?

The exam duration is 90 minutes. At 65 questions, that gives you roughly 83 seconds per question on average, so practising under timed conditions beforehand is important.

What question types appear on the CLF-C02?

Two types: multiple-choice (pick one correct answer from four options) and multiple-response (pick exactly two correct answers from five options). There is no partial credit on multiple-response questions.

Which domain has the most questions on the CLF-C02?

Domain 3 — Cloud Technology and Services — is weighted at 34%, making it the largest domain. Domain 2 (Security and Compliance) is close behind at 30%.

How much does the CLF-C02 exam cost?

The current registration fee is $100 USD, though this is subject to change. Check the official AWS Training and Certification site for the most up-to-date pricing before you register.

Final Thoughts

The CLF-C02 exam format is straightforward once you understand it: 65 questions, 90 minutes, two question types, four domains. The real work is building genuine fluency with the concepts — especially in Security and Compliance and Cloud Technology and Services, which together make up nearly two-thirds of your score.

Use the domain weightings to guide your study plan, practise under realistic timed conditions, and make sure you understand the why behind each AWS service rather than just memorising names. That's the difference between candidates who pass comfortably and those who scrape by — or have to retake.