1.Computers think in terms of ones and zeroes. This is known as what system?

Hexadecimal

Dewey

Binary

Pentagon

2. If you want to keep a safe copy of a file while you're working on it, because you want to save the file in a different format or you want to save a copy before you go on and make more changes, the best command to use is:

Save

Copy

Save As

Revert to Saved

txt, .rtf, .pdf, .docx - Which format saves your work in the ASCII format that contains no formatting but is easily viewed and edited in other applications?

.txt

.rtf

.pdf

.docx