To view the amounts of free, used, and swap memory in the CentOS 7 operating system, what command should you use?

In Word, the ________ box is a box in the scroll bar that can be dragged to reposition the visible portion of the document on the screen

A) plus/minus B) drag C) scroll D) zoom

Explain three schemes that you could use to have a function “return” two data items to the calling function. Note: you can’t use global variables.

What will be an ideal response?