How malloc and free are implemented , how os deals wit them, etc

Question

Accepted Answer

malloc and free are functions used for dynamic memory allocation in C. The operating system manages memory allocation and deallocation.

malloc is used to allocate memory dynamically, while free is used to deallocate memory.
malloc allocates a block of memory of the specified size and returns a pointer to the beginning of the block.
free releases the previously allocated memory block, making it available for reuse.
The operating system manages the memory allocation and deallocation through its memory management system.
When malloc is called, the operating system allocates a block of memory from the heap.
When free is called, the operating system marks the previously allocated memory block as available for reuse.
The operating system may use various algorithms to manage memory, such as first-fit, best-fit, or buddy system.
Example: int* ptr = (int*) malloc(10 * sizeof(int));
Example: free(ptr);

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