I have an Operating system course exam

Topics: How syscalls work. Process schedulers. LIFO, FIFO, round robin MLFQ. Malloc and free. Stack memory vs. heap memory. How BRK/SBRK are involved l. Linked lists implementation of malloc/free. Why memory gets fragmented. File systems. Block size, inodes, files: regular and directory files. Hard links. Super block inode bitmap, data bitmap. How large files can be stored. How files are found given their path. Xv-6.