42 Exam 05 [better]

42 Exam 05

• Level 1 (Easy): Write a program that creates N threads, each printing a number. (Tests basic thread creation and joining).
• Level 2 (Medium): Protect a shared counter with a mutex to avoid data races.
• Level 3 (Hard): Implement a producer-consumer simulation using semaphores.
• Level 4 (Extreme): A multi-stage pipeline (e.g., dining philosophers, but simplified). This is where most students fail.

Example solved problem (concise)

Classes must include a default constructor, copy constructor, assignment operator, and destructor. Abstract Classes: Using pure virtual methods (like ) to create base classes (e.g., ) that cannot be instantiated directly. Polymorphism:

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You have 4 hours. The terminal is waiting. Good luck.

Memory Management

: You must ensure no memory leaks when "forgetting" spells or deleting the Warlock. Level 1 (Easy) : Write a program that

Trust your muscle memory from the Piscine. Trust your while loops. Free your memory. Example solved problem (concise) Classes must include a

1. Implement a memory-managed linked list library supporting insertion, deletion, and iteration with strict error handling and tests for memory leaks.
2. Write a command-line tool that parses a structured text file, builds an in-memory representation (tree or graph), and answers queries with optimized performance.
3. Build a mini HTTP server (subset of functionality) handling concurrent requests using fork or threads, with correct header parsing and response formation.
4. Solve a graph shortest-path variant under constrained memory and justify complexity choices in comments.