exam02

A terminal trainer for the 42 Common Core Exam Rank 02.

It shows you a subject, gives you a workspace, and grades what you write — including the allowed-functions check that the real Moulinette enforces and that most informal practice setups skip.

Install

On macOS, download exam02_darwin_universal from the latest release. It runs natively on both Apple Silicon and Intel Macs, so there is no architecture to pick:

curl -L -o exam02 https://github.com/selezenart/PrepExam/releases/latest/download/exam02_darwin_universal
chmod +x exam02
xattr -d com.apple.quarantine exam02 2>/dev/null   # the build is unsigned
sudo mv exam02 /usr/local/bin/

On Linux, download exam02_linux_amd64 (or _arm64), make it executable, and put it on your PATH.

You need a C toolchain — cc and nm. macOS: xcode-select --install. Debian or Ubuntu: sudo apt install build-essential.

Use

mkdir practice && cd practice
exam02

rendu/ is created in the current directory, exactly as in the real exam.

• Exam — three hours, one exercise drawn from each of the four levels. 25 points each, 100 to pass, so passing means clearing every level. Failing an exercise draws another from the same level: it costs you time, not points.
• Practice — any exercise, no clock, unlimited attempts, and the reference solution available with r when you want it.

Keys: g grade, e edit in $EDITOR (vim by default), r reveal the solution in practice, w drill your weakest exercise, q back.

Marking exercises you are unsure of. Press m on any exercise, in practice or mid-exam, to mark it unsure; press it again to unmark. A mark is your own note to come back later: a pass does not clear it, and it never affects an exam's score or which exercise is drawn. In the practice list, marked exercises show a ?, f shows only those, and u opens the one you have gone longest without attempting.

How grading works

Your file is compiled with cc -Wall -Wextra -Werror, so a warning fails you, as it does in the real exam. Then nm is used to check you have not called a function the subject forbids. Then your code and the reference solution are run on the same inputs and their output compared.

The reference solutions are the oracle, which is why no expected outputs are written by hand — and it means a bug shared by your code and the reference will not be caught. Treat this as practice, not as the Moulinette.

Build

make test     # run the suite
make build    # build for this machine
make dist     # cross-compile all four platforms

The suite's most important test grades every reference solution against its own grader. If a driver or a case file is wrong, that test fails.

Content status

All 56 exercises across the four levels are gradable.

Credit

Exercise subjects and the reference solutions come from alexhiguera/Exam_Rank_02_42_School, MIT licensed, Copyright (c) 2026 Alex Higuera. The upstream licence is kept at third_party/exam_rank_02/LICENSE.

This is a practice tool. The real exam runs in a closed environment under the Moulinette, and its rules are the ones that count.