1. Cancer and Cancer Treatment
Key exam domainIdentify weak areas and improve with focused review.
Start PracticingPass your CSO certification
Free CSO Practice Test
Pass the Certified Specialist in Oncology Nutrition exam with confidence.
Start with a free CSO practice test and build exam-ready confidence for the Certified Specialist in Oncology Nutrition exam.
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1000+CSO Questions
4Exam Domains
10Free Questions
2026Updated
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What you get
Everything your CSO certification prep needs
Practice expert-vetted questions, find your weak domains, and turn every mistake into a focused review plan.
Expert-vetted questions
Every question is reviewed by an experienced CSO professional for clarity, accuracy and practical exam relevance.
See what to study next
Domain analytics show which parts of the exam blueprint are holding you back.
Turn mistakes into confidence
Missed questions become a review list, so nervous guessing turns into focused repetition.
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Study by domain
Practice the CSO exam by domain
2. Nutrition Assessment
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing3. Nutrition Interventions
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing4. Education and Counseling
Key exam domainIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the CSO exam, the questions, pricing, the free trial, and how this fits your prep.
The CSO exam spans 4 domains - Cancer and Cancer Treatment, Nutrition Assessment, Nutrition Interventions, and Education and Counseling. Every practice question maps to one of them, so you train on exactly what's tested.
The Certified Specialist in Oncology Nutrition (CSO) exam has 150 questions and is completed in 3 hours. Our timed practice tests mirror that length and pacing, so exam day feels familiar.
No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the CSO exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. CSO Exam Prep is an independent study resource for Certified Specialist in Oncology Nutrition (CSO). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.
Every paid plan unlocks the full bank of 1,000+ practice questions covering all 4 CSO domains - Cancer and Cancer Treatment, Nutrition Assessment, Nutrition Interventions, and Education and Counseling. You can practice the whole bank, filter by domain, or run a timed, domain-balanced exam simulation.
Yes - the bank is maintained against the current exam outline, and questions are revised when the exam changes.
No honest practice platform can guarantee a pass. What realistic practice does is show you - before exam day - exactly which domains are weak, and give you the repetitions to fix them. That's the difference between hoping you're ready and knowing where you stand.
Yes. You get 10 free sample questions with instant feedback - no credit card and no account required.
The free sample shows you the question quality. Paid plans unlock the full 1,000+ question bank, exam-style practice modes, mistake review, and - on Fast Track and Pass Confidence - progress analytics that show your readiness by domain.
No. Every plan is a single one-time payment for a fixed access window - 48 hours, 7 days, or 6 weeks. There is no auto-renewal and no recurring billing.
Match it to your exam date: Final Review (2 days) for an exam in the next day or two, Fast Track (7 days) for an exam this week, Pass Confidence (6 weeks) for a structured run-up.
For most countries, the price you see is exactly what you pay - tax is already included. Where local law requires it to be added separately, it's shown clearly at checkout before you pay, so there are never any surprise fees.
Access is instant after payment and runs for your plan's full window from that moment. When the window ends, your local progress stays on your device - you can buy another window any time and pick up where you left off.
Yes - the whole platform is mobile-first: practice, mistake review, and analytics all work on any phone, tablet, or laptop with a browser. Nothing to install.
Every answer feeds your per-domain accuracy, readiness score, and weak-area list. Instead of re-reading everything, you drill the domains that are actually costing you points - that's what moves a score in days, not months.
Chat with us any time - the 24/7 support chat in the corner of every page gives instant answers about plans, access, and billing. Prefer email? The contact link is in the footer. Payments are processed securely by Stripe, and active customers can download an invoice from their profile page.
Make sure you're signed in with the same email you used at checkout - access activates within a minute of payment. If it still doesn't appear, email us from the contact link in the footer and it'll be sorted out.
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Drill a single domain, run a mixed session, or sit a full timed exam simulation - pick the mode that fits your study window.
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Focus on one CSO domain at a time - pick it here, then choose a mode.
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Flashcards
Flip, grade yourself, and repeat the tough ones until they stick.
Train with flashcards →Review Mistakes
Re-drill the questions you got wrong.
Review now →Review Weak Domains
Drill your lowest-scoring domains first.
Find weak spots →All Questions
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$29.95Save 33%Limited time
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48-hour access
A focused 48-hour cram for candidates sitting the exam in the next day or two.
- Full 1,000+ question bank
- All 4 CSO domains
- Multiple-choice & true/false practice
- 48 hours of unlimited practice
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7-day access
A focused one-week study push with full progress analytics.
- Ensure success with analytics & mistake review
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For candidates with 2-6 weeks before exam day - the complete, confident way to prepare.
- Ensure success with analytics & mistake review
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- 6 full weeks of access
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Trusted by CSO candidates
Real feedback from CSO candidates on Reddit.
"passed last month. honestly the mock exams saved me, the nutrition assessment section was way harder than i expected and the practice tests matched that difficulty perfectly. i was behind on studying for weeks and still made it thru fine."
"i was skeptical about paying for another prep tool but csoexam.com actually broke things down by domain so i could see exactly where i was weak, turned out education and counseling was my gap. redid those sets until it clicked, passed first try."
"did the practice questions on the bus every day for like a month. didnt feel ready going in but the mistake review helped more than i thought it would. passed, no drama, just relief tbh."