How can you find out how many users are currently logged into the database? How can you find their operating system id?
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What are types of data model?
You look at your fragmentation report and see that smon has not coalesced any of you tablespaces, even though you know several have large chunks of contiguous free extents. What is the problem?
How can you determine if an oracle instance is up from the operating system level?
What are the data management skills?
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What is the difference between raid 5 and raid 10? Which is better for oracle?
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How many dba can you have?