Which of the following drives should be installed first?

A.
DVD drive

B.
Floppy drive

C.
Zip drive

D.
CD-ROM

Explanation:
If an internal Zip drive is to be installed, ensure that it is first properly attached to its 5 1/4-inch caddy. Then, mount the caddy into an available 5 1/4-inch bay as with other drives.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 251-273.