Java編程性能優(yōu)化技巧分享

EMC技術(shù)支持類部分筆試題

1 What are the differences between RAM、ROM and Flash RAM?
2 Please explain the following terms.
RAID 0
RAID 1
RAID 3
RAID 5
RAID 6
3 What’s the difference between DNS and WINS ?
4 For a SATA 160 Gb 10,000rpm disk drive, what is the average amount of time it takes for the data to be read?
5 What is a Race Condition? Please provide an example of a Race Condition.
6 Small Page Size   gives you  Small Page Table   (T/F)
 Small Page Size   generates  more  LTB( Translation Lookaside Buffer)   (T/F)
 Small Page Size  causes  less Page Faults    (T/F)
7 Please compare polling I/O with interrupt-drive I/O .
 In what situation would you favour one technique over the other?
8 What is the difference between NAS and SAN storage?
 

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