PCA Exam Guide 2026: cost, format, passing score and study plan

PCA exam facts

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PCA exam domains and weights

How many questions and how long is PCA?

The PCA exam has 60 questions and a time limit of 90 minutes, as stated in the Linux Foundation's exam instructions and checked on 23 October 2026. Delivery is: online, proctored, multiple-choice. That leaves roughly 90 seconds per question if you spread the time evenly. The questions are spread over 5 exam domains, and the published domain weights tell you how much of the paper each domain accounts for, so heavier domains deserve proportionally more of your practice time. GoldenKube is an independent community project, not affiliated with or endorsed by CNCF or The Linux Foundation, so confirm every figure on the official page before you book.

PCA questions frequently show a PromQL expression or a configuration snippet and ask what it returns or does, so careful reading matters more than recalling definitions.

Pacing matters more than raw speed on a multiple-choice paper. A simple routine is to answer what you know on the first pass, flag anything that needs a second look, and use the remaining minutes on the flagged questions rather than stalling early. With about 90 seconds on average per question, a question that has taken more than twice that is a good candidate for flagging.

Practice should mirror the exam shape: one question at a time, a committed answer, then the explanation. GoldenKube's practice mode works this way and brings missed questions back until you answer them correctly, which is closer to how recall is tested than rereading notes.

What is the passing score for PCA?

The Linux Foundation lists the PCA passing score as 75% (checked 23 October 2026). Treat the percentage as the target and aim comfortably above it in practice. The heavier a domain is weighted, the more of the exam it decides, so neglecting a large domain is the costliest way to fall short. The largest PCA domain, PromQL, carries 28% of the exam, and the next, Prometheus Fundamentals, carries 20%. Together they make up 48% of the exam, so plan to be reliably above the line in both before you book, and treat every smaller domain as the place to pick up the remaining points.

Use the passing score as a calibration tool. When you practise, track your accuracy per domain instead of one overall number, and treat a domain you keep missing as a gap to close before booking. A single good overall percentage can hide a weak, heavily weighted domain.

The official certification page is the authority for the passing score and can change, so read it again on the week you register. The source links below point to the exact pages this guide was checked against.

How much does PCA cost and how long is it valid?

The PCA exam fee is $250 (USD), listed on the official certification page and checked 23 October 2026. The certification is valid for 2 years, so plan for it to lapse unless you renew it; the official page is the place to confirm how renewal works. Prices and bundles can change, so treat the figure here as the list price on the checked date and confirm it at checkout. PCA is one of the certifications in the Golden Kubestronaut program that GoldenKube helps you prepare for. Budget for the exam fee itself, and remember that a certification only helps while it is current, so decide up front when you would renew it and what that renewal would cost.

Validity is the part people forget when planning a program such as Golden Kubestronaut: with 2 years of validity, the order you take the exams in decides when each one needs renewing, and taking PCA early in a long sequence can mean renewing it before you finish the rest.

PCA is a Golden-tier certification: it is not one of the five Kubestronaut core exams, but the Golden Kubestronaut program includes it.

GoldenKube practice itself is free: 10 guest answers, then a free account, no credit card. The exam fee is paid to the Linux Foundation, not to GoldenKube.

How hard is PCA?

PCA is hardest in PromQL, which is 28% of the exam and its largest domain. The other four are Prometheus Fundamentals (20%), Observability Concepts and Alerting & Dashboarding (18% each) and Instrumentation and Exporters (16%), and they are mostly recall once the data model is clear. PromQL is different because options often differ by one operator, one label matcher or one range, and the only reliable way to choose is to know what each expression returns: an instant or a range vector, a per-second rate or a raw increase, labels kept or dropped. Candidates who have only read dashboards, rather than written queries, find this domain slow. This guide does not quote pass rates; the practical test is predicting a query's result before you run it.

PCA is the most query-heavy of the associate exams. PromQL is 28% of the paper, the largest domain, followed by Prometheus Fundamentals (20%), Observability Concepts and Alerting & Dashboarding (18% each) and Instrumentation and Exporters (16%). Because the exam is multiple choice, you will be reading queries and predicting what they return instead of writing them from scratch, which still requires precise knowledge of the language.

The difficult points are subtle semantics: the difference between an instant vector and a range vector, what rate() and increase() do to counters, how aggregation with by and without changes the labels you keep, and how histograms are queried with histogram_quantile. Fundamentals add the pull model, scrape configuration, service discovery and how the data model uses metric names and labels. Concepts such as SLIs and SLOs fill the smaller domain.

Give PromQL its own sessions with a real Prometheus instance, even a local one. Running a query and seeing the shape of the result teaches vector types faster than reading, and the exam questions on selectors, operators and functions are much easier once you have seen the output.

Registration, scheduling and retakes

Register through the official PCA certification page on the Linux Foundation site. Delivery is described as: Online, proctored, multiple-choice. Prerequisites: None. Retake policy: One retake per exam purchase if a passing score is not achieved. These statements were checked on 23 October 2026 against the pages listed under Resources. The rules for identification, the testing environment and rescheduling are set by the Linux Foundation, so read its candidate documentation for the current requirements before you book. Book a slot only after your practice results are stable across every domain, leave a buffer between your last study session and the exam, and keep the confirmation details somewhere you can find them quickly.

Before booking, run a local Prometheus and write each PromQL pattern from the study plan below; practice with real query output is the closest preparation for the expression-reading questions.

A retake is covered by the stated policy, but treat the first attempt as the real one and use the weights above to decide where your remaining study time goes.

A 3-week PCA study plan

This 3-week plan orders the PCA domains by how much of the exam they carry and how much each one builds on the others. Each week has one focus, and the table lists the domains it covers. The intent is to read the official material for a domain, then answer practice questions on it, then read the explanations for every miss. Adjust the pace to your background: someone who already works with the technology daily can compress it, and someone new to it should stretch each week. Keep a short list of the questions you missed and reread it on the last day, since repeated misses mark the real gaps.

Spend roughly the same share of time on a domain as it carries in the exam, then add extra time wherever your practice accuracy is lowest. In GoldenKube you can focus on a single domain, or let smart practice pick the domain where you are weakest.

In the last few days, stop learning new material. Run mixed practice, review only the questions you missed, and sleep properly before the exam.

Resources

Start from the official PCA certification page, which holds the current domain list, the fee and the booking link. The certification page also points to the official curriculum, published as a PDF in the CNCF curriculum repository; read it as the authoritative list of what can be asked. For the subject itself, use the project's own documentation, Prometheus documentation (prometheus.io), which is the best single source for terminology and behaviour. Then use GoldenKube practice questions on the PCA practice page to test recall, and revisit the documentation for every explanation that surprised you. Official pages are the source for facts that can change, such as the fee and the format, so check them again in the week you book. The links are listed below this section, and each fact in this guide was checked against them on the date shown above.

• Official PCA certification page and exam details on the Linux Foundation site.
• Official PCA curriculum PDF in the CNCF curriculum repository.
• Prometheus documentation (prometheus.io).
• GoldenKube PCA practice questions, free to start with 10 guest answers.

Frequently asked questions