This article is adapted from a post in Dr Koshy Jacob's "Building Revise Radiology in Public" series on LinkedIn.

I wrote recently about why candidates fail the FRCR 2B, leaning heavily on a resource most candidates never open: the examiners' reports published by the College after every sitting.

But for the 2A, there is an immediate problem: there is no equivalent report.

The 2A is a machine-marked, single best answer (SBA) examination. The College publishes no sitting-by-sitting account of where candidates went wrong. Where the 2B candidate can read exactly which mistakes cost marks, the 2A candidate prepares in the dark. Into that darkness has grown a folklore of question banks, exam recalls, and revision advice of wildly uneven quality.

This article is assembled to fill that silence. Based on published outcome data, the structure of the examination, the science of learning, and the quiet conversations candidates have when nobody official is listening, here is the reality of why candidates fail the 2A—and how to pass it.

The Scale of the Challenge

Most candidates assume the 2A is the gentle middle sibling of the FRCR exams. It isn't.

The exam consists of two papers, 120 questions each, across three hours per paper. That is 240 questions at roughly 90 seconds each, drawn from six subspecialty blocks. There is no negative marking, and the pass mark usually hovers in the mid-fifties to mid-sixties.

In a cohort study of 1,860 UK trainees, over 79% passed Part 1 on their first attempt. But of those first-time passers, only 63.7% went on to pass the 2A first time. More than a third of a group who had already cleared one hurdle stumbled on this one.

Here are the four primary failure modes they fall into.

Failure Mode 1: The Breadth Trap

With 240 questions, the exam samples essentially the entire curriculum. This produces a failure mode that has nothing to do with a candidate's underlying ability.

The arithmetic of breadth is unforgiving. If 40 questions come from an area you have effectively not studied—perhaps because your rotations didn't cover it—you are relying on the other 200 questions to carry that deficit. Against a ~60% pass mark, that leaves almost zero margin for error anywhere else.

> The Takeaway: The single best predictor of 2A failure is not weakness; it is unexamined, uneven knowledge.

Failure Mode 2: Recognition vs. Recall

A single best answer question is a small machine built for punishing partial knowledge. A well-written SBA discriminates between the candidate who can recognize the right answer in isolation, and the candidate who can still find it when it is hiding next to three expertly crafted distractors.

This is where the "illusion of knowing" does its greatest damage. Re-reading textbook chapters produces familiarity, and familiarity feels like knowledge. But the SBA doesn't ask if material is familiar; it asks if it can be retrieved precisely, under time pressure, alongside engineered alternatives.

If you walk out of the 2A feeling like every question had two correct answers, the exam functioned exactly as designed. Your preparation was just measuring the wrong thing.

Failure Mode 3: The Question Bank Trap

Because the 2A is a question-based exam, preparation culture revolves around question banks. (Full disclosure: my company sells one, which is why I know these traps intimately).

1. Volume Worship: There is a false belief that doing 6,000 questions beats doing 2,000. If you are racing through explanations just to keep your count moving, you are wasting your time. A question you got wrong and did not sit with is a question wasted.

2. The Quality Deficit: The market is flooded with poorly written or machine-generated questions. Practicing on flawed questions teaches flawed patterns. We previously used AI to rework some of our own older questions, and it degraded them so much we had to cut our bank from 6,000 to 2,400 to maintain quality. If a question wouldn't survive review by a subspecialist consultant, it is noise, not practice.

3. Relying on Recalls: Hunting for "remembered" exam questions optimizes for the one thing the College can change at will: last year's paper. Preparing this way memorizes answers, but the exam tests your ability to reason.

Failure Mode 4: Poor Technique

Ninety seconds a question for six hours is its own distinct skill. The classic failure pattern is spending four minutes wrestling with a question you were never going to get, forcing you to rush through ten questions you would have gotten comfortably.

Working a question bank untimed, on a sofa, with the explanation just a click away rehearses a completely different, easier task than the one the exam sets.

What Actually Works: The Blueprint for Passing

The candidates who pass the 2A don't just work harder; they work differently. If you want to survive the 2A, adopt these four evidence-based techniques:

1. Log Your Errors and Squeeze the Questions

Every wrong answer must be recorded with its root cause: Did I misread the stem? Was it a knowledge gap? Was I rushing? Treat the disease, not the symptom. Furthermore, an SBA has five options, and four are wrong for specific reasons. If you work out why each distractor fails, you have effectively done five questions in the time of one.

2. Triage Your Weaknesses

Sort every topic into three buckets: solidly known, shaky, and blind spots.

Solid: Leave it alone. (Stop comfort-revising!)

Shaky: Correct this immediately. Small uncertainties are cheap to fix now and expensive to rediscover in the exam hall.

Blind Spots: Take these back to the reference texts.

3. Use Spaced Repetition and Interleaving

The forgetting curve is real. You must return to material at expanding intervals just as it begins to fade. (This is why tools like Anki are so highly utilized by top candidates).

Additionally, stop doing 40 MSK questions in a row. Mix your blocks. Make a pediatric question follow a vascular one so your brain is forced to constantly identify what kind of problem it is looking at. It feels harder, but it produces reliably better performance on exam day.

4. Rehearse Reality

You must do full, timed, 6-hour rehearsals before the real thing. Practice the discipline of committing to an answer, flagging it, and moving on. Only change an answer if you genuinely missed something in the stem on your first pass—answers changed on nerves alone are usually changed for the worse. Finally, guard the break between papers. Do not discuss answers with colleagues; carrying discovered mistakes into paper two will only destroy your focus.

The Bottom Line

A candidate who fails the 2A is almost never stupid and almost never lazy. They are usually uneven in their knowledge, over-familiar rather than deeply tested, and prepared on material of mixed quality. Every single one of those things can be fixed once it has been named. Fix the strategy, and you fix the outcome.

Part 1 has its own story, and it will get its own article.

Sources and further reading

Royal College of Radiologists. FRCR Part 2A (Radiology) CR2A guidance notes for candidates: format, standard setting and regulations. RCR website.

Pakpoor J, Al-Tawarah Y, Muthuswamy K, Taylor SA, et al. Differential outcomes at the Fellowship of the Royal College of Radiologists (FRCR) exams according to demographic and socioeconomic factors. Clinical Radiology 2024. PMID 39327208.

Dunlosky J, Rawson KA, Marsh EJ, Nathan MJ, Willingham DT. Improving students' learning with effective learning techniques. Psychological Science in the Public Interest 2013;14(1):4-58.

Roediger HL, Karpicke JD. Test-enhanced learning: taking memory tests improves long-term retention. Psychological Science 2006;17(3):249-255.

Butterfield B, Metcalfe J. Errors committed with high confidence are hypercorrected. Journal of Experimental Psychology: Learning, Memory, and Cognition 2001;27:1491-1494.

Metcalfe J. Learning from errors. Annual Review of Psychology 2017;68:465-489.

McGaghie WC, Issenberg SB, Cohen ER, Barsuk JH, Wayne DB. Does simulation-based medical education with deliberate practice yield better results than traditional clinical education? A meta-analytic comparative review of the evidence. Academic Medicine 2011;86(6):706-711.

Cepeda NJ, Pashler H, Vul E, Wixted JT, Rohrer D. Distributed practice in verbal recall tasks: a review and quantitative synthesis. Psychological Bulletin 2006;132(3):354-380.

Kerfoot BP, DeWolf WC, Masser BA, Church PA, Federman DD. Spaced education improves the retention of clinical knowledge by medical students: a randomised controlled trial. Medical Education 2007;41(1):23-31.

Deng F, Gluckstein JA, Larsen DP. Student-directed retrieval practice is a predictor of medical licensing examination performance. Perspectives on Medical Education 2015;4(6):308-313.

Rohrer D, Taylor K. The shuffling of mathematics practice problems improves learning. Instructional Science 2007;35(6):481-498.

Booth TC, Martins RDM, McKnight L, Courtney K, Malliwal R. The Fellowship of the Royal College of Radiologists (FRCR) examination: a review of the evidence. Clinical Radiology 2018;73(12):992-998.

Originally shared by Dr Koshy Jacob on LinkedIn. Follow the series there