Piscine 42 Exclusive | Exam 01

Situation: You have been on ft_split for 30 minutes. It's not working.

Step 1: Punt.
Comment out everything. Write the simplest possible version that returns NULL. Grade it. You get 0%, but you keep your sanity.

Step 2: Simplify.
Ask yourself: "What is the absolute smallest piece of this function that I can get to compile and run?"

Step 3: Trace on paper.
Draw memory. Write your string: "hello world". Walk through your code manually.

Step 4: Use printf (during YOUR testing).
The Moulinette doesn't see your prints. Add printf("i=%d\n", i); to debug. Remove before final commit.

Step 5: The "Brute Force" If you can't solve elegantly, solve stupidly. Use a 2D array of fixed size (if allowed). Use nested loops. Get a partial grade. A 50% on Level 3 is better than a 0% because you keep Level 2's grade.

If you are currently swimming (or about to dive) into the infamous 42 Piscine, you have likely heard whispers about a specific event that separates the determined from the lost: Exam 01. exam 01 piscine 42 exclusive

For many candidates, this is the first real psychological and technical wall. The keyword floating around the corridors of 42 campuses worldwide is "exam 01 piscine 42 exclusive" — a phrase that hints at a unique, closed-door challenge that you cannot find on standard coding platforms.

This article provides an exclusive, deep-dive analysis of Exam 01. We will cover its structure, the specific functions you must master, grading secrets, common pitfalls, and the exact mindset required to pass it.

In the 42 exam environment, you cannot copy-paste from the internet, but you can copy-paste within your own terminal. Write a standard template:

#include <unistd.h>
// Function here
int main(void) // Hidden from Moulinette, but useful for your own testing
ft_putstr("Hello Exam 01");
return (0);

Exclusive trick: Comment out your main before grademe. Moulinette expects only the function. If you leave main in, you get a compilation error (score -42).

The XOR (exclusive OR) operation yields 1 when bits differ and 0 when they are the same.

Truth table:

| A | B | A XOR B | |---|---|---------| | 0 | 0 | 0 | | 0 | 1 | 1 | | 1 | 0 | 1 | | 1 | 1 | 0 |

In C, the ^ operator performs bitwise XOR.

One feature that makes Exam 01 truly unique to 42 is the Moulinette (the automated grading system) is compiled with fsanitize=address for memory leaks. In most coding exams, if your program leaks memory but returns the correct value, you might pass. Not here. Situation: You have been on ft_split for 30 minutes

Exclusive Rule: If you allocate memory with malloc and forget to free it, even if the output is correct, the exam grades you as a failure for that exercise. Leaks are considered crashes. This forces Piscine students to rigorously pair free() with every malloc() from day one.

Before you even think about grademe, run:

norminette ft_putstr.c
norminette ft_strlen.c

If Norminette complains about:

Fix it immediately. A Norm error equals instant failure.

The term "exclusive" attached to Exam 01 is not just marketing hype. It refers to three exclusive characteristics:

Thus, "exam 01 piscine 42 exclusive" refers to that unique, high-pressure crucible that exists nowhere else in the tech world. Exclusive trick: Comment out your main before grademe