CLF-C02 Exam Guide: Format, Cost, Domains, and How to Prepare
The AWS Certified Cloud Practitioner (CLF-C02) is AWS's foundational certification — designed for people with no deep technical background who need to demonstrate broad cloud literacy. It's the most-taken AWS exam and the usual first step before associate-level certifications.
This guide summarizes the official exam details as published by AWS. Confirm current details on the official certification page before booking, since AWS revises exams periodically.
Exam format at a glance
- 65 questions — multiple choice (one correct of four) and multiple response (two or more of five+)
- 90 minutes — about 1.4 minutes per question, generous compared to associate exams
- $100 USD — the cheapest AWS certification
- Passing score: 700 on a scaled range of 100–1000 (compensatory scoring — no per-domain minimum)
- 50 scored + 15 unscored questions; unscored items aren't identified, so treat every question seriously
- Pearson VUE testing center or online proctored exam
The four domains
CLF-C02 weights breadth over depth. The official domain percentages:
- Domain 1: Cloud Concepts — 24% (value of the cloud, Well-Architected basics, cloud adoption benefits)
- Domain 2: Security and Compliance — 30% (shared responsibility model, IAM basics, compliance resources)
- Domain 3: Cloud Technology and Services — 34% (the largest domain: core services, global infrastructure, deployment methods)
- Domain 4: Billing, Pricing, and Support — 12% (pricing models, billing tools, support plans, cost calculators)
What the exam actually tests
CLF-C02 asks 'what is this service for' more than 'how do you configure it.' Expect scenario snippets like 'a team needs to run code without managing servers' — and the answer is recognizing that Lambda is the fit. The shared responsibility model shows up repeatedly in different disguises; know exactly where the AWS/customer line sits for EC2 vs managed services.
Billing questions are easy points: AWS Budgets vs Cost Explorer (alerts vs analysis), the Pricing Calculator for estimates, and the support plan tiers (Developer → Business → Enterprise) and what each unlocks.
A realistic prep plan
Most candidates with some IT exposure pass with 2–4 weeks of study; complete beginners should budget 4–6. The trap is over-studying depth — CLF rewards breadth, so cover every domain rather than mastering one.
- Week 1: Cloud concepts + security — shared responsibility model until it's reflexive
- Week 2: Core services — compute, storage, databases, networking at recognition level
- Week 3: Billing/pricing/support + practice questions per domain
- Final days: timed practice sets, review every explanation (including why wrong answers are wrong), re-drill weak domains
After CLF-C02
Cloud Practitioner validates vocabulary and concepts — the next step depends on your role: Solutions Architect Associate for architecture, Developer Associate for builders, AI Practitioner for AI/ML fundamentals. Passing CLF also unlocks a 50%-off voucher on your next AWS exam, which meaningfully reduces the cost of the associate-level path.