Threads created via pthread_create need to first set up shared memory using shmop before they can share data.

What does the 'open' system call return to the caller?

Effect of a process executing an unlink system call while another process has opened the same file?

Which signal cannot be ignored by a process?

Ignoring the setup cost for each of the System V IPC mechanisms, which one is the most efficient?

Command to list the shared libraries used by an executable?

In a Unix toolchain, which one of these pairs does not fit with the others?

What does this code do: [aLock lockWhenCondition:(int)self beforeDate:[NSDate dateWithTimeIntervalSinceNow:maxTimeInterval]];

Which of the following could the fork() command return to the parent process?

A pipe has been created, and fork() and exec() calls have been completed. What steps must be taken next in order to establish communication from the parent to the child?

Choose the answer that corrects the following code. FILE * file1; : if ((file1 = open("/valid_dir/existing_file", O_RDONLY, 0666)) == ERROR) { /* /valid_dir/existing_file is guaranteed to exist */ :