In Linux, if multiple processes open the same file with the open() system call, all the system calls return the same file descriptor number True False If open() is called with a filename that does not exist, open() always returns an error. True False In Linux, the current working directory (CWD) is the directory where a file we execute is True False In Linux, the high-level file API (fread and fwrite) can be supported by the buffering technique True False Which of the following statements is false? Two file descriptors with different numbers can point to the same file High-level APIs use "buffering," and the buffer will only flush the data when it's full If a process has an open file descriptor (fd) and does "fork()", both the parent and the child can use the fd. Linux offers high-level file APIs (using "streams") implemented in C Linux also offers low-level system calls for doing operations with file descriptors directly