This assessment is designed for UNIX Systems Programmers. It measures a deeper understanding of the UNIX operating system architecture and low-level interfaces (system calls and library functions) that are required to build system-level and multithreaded applications on Linux, UNIX and UNIX-like systems. It covers file system programming, process management, signal management, parallel programming and interprocess communication. Shell programming is covered in a separate test. This test assumes understanding of POSIX C language programming. The UNIX/LINUX PROGRAMMING test is recommended for developers and administrators requiring a more general understanding of UNIX\/Linux.