emc技術支持類部分筆試題

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?