File I/O and System Programming Mastery Hub: The Industry Fo

In the context of the "The Complete Linux System Programming Course 2026: From Zero to Expert!", which system call, when operating on a file descriptor representing a regular file, is **least** likely to be affected by the O_APPEND flag during a write operation, assuming no concurrent writes?

Considering the advanced concepts presented in "The Complete Linux System Programming Course 2026: From Zero to Expert!", what is the primary implication of using `splice()` for transferring data between two file descriptors, particularly in scenarios involving network sockets and regular files, concerning buffer management and kernel involvement?

Within the advanced system programming paradigms covered in "The Complete Linux System Programming Course 2026: From Zero to Expert!", when dealing with asynchronous I/O (AIO) using `io_uring`, what distinguishes an "event" in the context of `io_uring_cqe` from a traditional blocking I/O completion notification?