Before you learn a single AWS service, it is worth knowing exactly what you are walking into. Most of the unpleasant surprises on exam day are not about the cloud at all — they are about the format.
The facts, in one place
The AWS Certified Cloud Practitioner (CLF-C02) is 65 questions in 90 minutes. It costs $100 USD. You pass with 700 on a scale of 100 to 1000, and the certification is valid for three years. You can sit it at a Pearson VUE test centre or online with a proctor watching through your webcam.
Questions come in two shapes: multiple choice, with one correct answer out of four, and multiple response, where you must select two or more correct answers from five or more options. There is no penalty for a wrong answer, and multiple-response questions are all-or-nothing — partial credit does not exist. Both of those facts have direct consequences for how you sit the exam, which we will come back to.
Fifteen of your 65 questions do not count. AWS mixes in unscored trial questions it is evaluating for future exams. They are not marked, they are not grouped, and you cannot identify them. The only sane response is to treat all 65 as scored — which is what the format intends. It also means that an oddly-worded question you cannot place might simply be one AWS is still testing. Do not let it rattle you.
Your score is scaled, not counted. 700 out of 1000 is not “70% correct”. Scaling exists so that slightly harder and slightly easier versions of the exam are equally fair, so the raw number of correct answers behind a 700 varies. Nobody outside AWS knows the exact conversion, and chasing it is wasted effort. Practise to be comfortably above the line, not to land on it.
There is no per-domain pass. You cannot fail by being weak in one domain, as long as your total clears 700. This matters for how you spend your last week: pushing a strong domain from good to excellent is worth less than pulling a weak one from bad to adequate.
What the weights actually tell you
The four domains are weighted 24 / 30 / 34 / 12. Read that as a study budget rather than a table:
- Cloud Technology & Services — 34%, about 22 questions. The largest domain, and the one with the longest list of service names to keep apart.
- Security & Compliance — 30%, about 19 questions. The heaviest single-topic domain, built almost entirely on the shared responsibility model.
- Cloud Concepts — 24%, about 15 questions. Definitional, not technical — and punishing if your definitions are approximate.
- Billing, Pricing & Support — 12%, about 8 questions. The smallest, the most factual, and the cheapest marks in the exam.
Technology and Security together are close to two thirds of the paper. If your preparation time is short, that is where it goes. But do not skip Billing on the strength of its 12% — it is the one domain where an evening of reading converts almost directly into marks, because there is nothing to reason about, only things to know.
Time, and the trap inside it
90 minutes for 65 questions is about 83 seconds per question, and that is a comfortable pace for this exam. The CLF-C02 does not use the long, scenario-heavy stems that make the Solutions Architect exam a race. Most questions are two or three lines.
Which creates a different trap: with time to spare, candidates talk themselves out of correct answers. The pattern is familiar to anyone who has sat one of these — you read a question, the answer is obvious, and then you begin to wonder whether it is too obvious and start constructing a reason for one of the other options. At Cloud Practitioner level, the obvious answer is usually right. The exam is testing whether you know what a service is for, not whether you can find the trick. Flag it, move on, come back if time allows — but change an answer only if you can name what you missed the first time.
Never leave a question blank. No penalty for a wrong answer means a blank is a guaranteed zero and a guess is not. Eliminate what you can and commit.
If English is not your first language
AWS grants a 30-minute extension for candidates taking the exam in a language that is not their first — 120 minutes instead of 90. It has to be requested in your AWS certification account before you book, it is not applied automatically, and it cannot be added retroactively. It costs nothing and requires no proof of language ability. If it applies to you, request it now rather than at booking time.
Knowing when you are ready
There is no honest formula, but there is a reliable signal, and it is not a percentage.
Take full-length practice tests under exam conditions — 65 questions, 90 minutes, no notes, no pausing. Score comfortably above the pass mark, more than once. And then apply the real test: for each question you got right, can you say why the other three options were wrong?
That last question is the one that separates candidates who pass from candidates who are surprised. It is entirely possible to score well on a practice test by recognising answers you have seen before, and to learn nothing transferable in the process. The exam will not show you those questions. It will show you questions built the same way, about things you have not seen — and the only skill that carries across is the ability to rule things out for a reason.
Which is why every explanation in this cluster spends more words on the wrong options than the right one. Start with the six below.
Updated for CLF-C02 (July 2026). The sample questions above are our own work
in the style of the exam — not real exam items. The exam itself is set and marked
by the certification body.