____ provide a high-level interface for passing data between two processes regardless of their locations.

A(n) ____________________ button is a button that submits the form to the CGI script for processing.

Fill in the blank(s) with the appropriate word(s).

By default, the Linux du command expresses file usage by which of the following?

A. number of total bytes B. number of 512-byte blocks C. number of bytes per second D. number of disk directories