单项选择题

Which of the following RAID levels would be the BEST choice if performance was the only determining factor?（）

A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10

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单项选择题

Multiple expansion cards are installed in a rack mount 1U server. All expansion cards stop working simultaneously.
Which of the following is the MOST likely cause of the problem？（）

A. Motherboard
B. Operating system
C. Expansion cards
D. Riser cards

单项选择题

Which of the following offers the MOST redundancy for a system but is also very costly?（）

A. RAID implementation
B. Disk-to-disk replication
C. Server-to-server clustering
D. Hot site replication

单项选择题

A system administrator needs to maintain 1.2TB of storage for a database server. There are six 250GB drives available in the server for storage space. Which of the following RAID configurations would be the BEST choice given that performance and fault tolerance are important factors?（）

A. RAID 1 across drive pairs totaling 3 pairs
B. RAID 5 across all 6 drives
C. RAID 10 across all 6 drives
D. RAID 0 across all 6 drives