Which of the following SCSI types use 16-bit bus?

A.
Fast Wide SCSI-2

B.
Double Wide SCSI-2

C.
Fast SCSI-2

D.
Wide SCSI-2
E: Ultra-2 SCSI (Fast-40)

Explanation:

The following SCSI types use 16-bit bus:
1.Wide SCSI-2
2.Fast Wide SCSI-2
3.Wide Ultra SCSI-3
4.Wide Ultra-2 SCSI
5.Ultra-3 (Fast-80 or Ultra 160)

Small Computer System Interface (SCSI) is the second most popular drive interface in use today after
the Integrated Drive Electronics (IDE) interface. SCSI is faster than IDE and supports more devices.
SCSI devices, such as hard disk drive and CD-ROM drive, are better suited in a network environment
in which many users access shared drives simultaneously.
Answer option B is incorrect. Double Wide SCSI-2 uses 32-bit bus.
Answer options C and E are incorrect. Fast SCSI-2 and Ultra-2 SCSI (Fast-40) used 8-bit bus.
Reference: “http://en.wikipedia.org/wiki/SCSI”