The Certkiller administrator want to know which of the RAID array implementations would not provide data fault-tolerance when it is required?

A.
RAID 0+5

B.
RAID 5+0

C.
RAID 3

D.
RAID 0

Explanation:
RAID 0 is the simplest level, and uses disk striping without parity thus it requires less time for disk access, but no redundancy or error correction is provided making this type of RAID solution only to be used when reliability is not vital.
Incorrect
Answers:
A: The RAID 0+5 implementation is used to form large arrays by combining the block striping and parity features of RAID 5 with the straight block striping of RAID 0.
B: The RAID 5+0 implementation is a RAID 0 array striped across RAID 5 elements used to provide better fault tolerance than the single RAID 5 level does.
C: The RAID 3 specification is designed to use parallel transfers similar to RAID 2, along with byte-level parity striping.
Reference:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 186