42 Exam Rank 03 Updated < Essential ✔ >

By the time you sit for Exam 03, you should have completed Libft (Rank 02). Use it. You are allowed to use your Libft functions in the exam. Instead of writing a string length counter from scratch every time, use ft_strlen. This saves time and reduces syntax errors.

The most common failure in the updated exam is off-by-one in death timing. Use gettimeofday() (or preferably clock_gettime(CLOCK_MONOTONIC) for precision). Store last_meal_time per philosopher. The monitor thread must check: 42 exam rank 03 updated

if (current_time - philo->last_meal_time > philo->data->time_to_die)
    print_death(philo);

Do not check only after usleep; use a separate monitor thread or loop. By the time you sit for Exam 03,

Upon passing Exam 03, you will unlock the projects for Rank 03. The curriculum update has streamlined the path to focus on three critical pillars: complex logic, memory allocation, and sorting algorithms. Do not check only after usleep ; use

| Mistake | Consequence | Fix | |---------|-------------|-----| | Using printf directly | Race conditions in output | Use a dedicated print_status with a mutex | | Checking death only at end of timeouts | Philosopher dies late (10ms+ error) | Check death between each action and inside monitor thread | | Not handling 1 philosopher case | Takes fork, dies immediately | Special case: 1 philosopher prints death after time_to_die | | Forgetting to join threads | Memory leaks, incomplete cleanup | Join all threads in main | | Incorrect mutex initialization/destroy | Undefined behavior | Initialize before threads, destroy after join |

The keyword “updated” matters. Here is what has changed:

Historically, exams were purely randomized coding exercises. While the format remains similar (coding tasks against a deadline), the pool of questions has been refined.