Please fill in the blanks. Each blank is worth 5 points. Blanks with the same number label have the same answer.
pto be a(n) ____array____ of two ____integers/numbers/file descriptors____. To use
printfon these, one must call ____fdopen____ to get a(n) ____file pointer/formatted i/o descriptor____ corresponding to the pipe's input.
fork()returns ____the child's process-id/pid____ for the parent process and ____0____ for the child. The child is an exact ____copy____ of the parent. By contrast, the ____exec/execl,etc____ call replaces the child's program with another, but preserves open ____files/file descriptors____. The ____dup____ call allows one to change the standard input from a child so that it points to a program rather than a terminal.