Rajesh, Comments Inline. On Thu, 4 Nov 2004 17:52:07 -0500, Rajesh Puneyani <rajpuneyani@xxxxxxxxx> wrote: > Hi Guys, > > Recently I appeared in an interview for a position (after a long > time), Here are a few questions that got me confused. > > Pls. give me your feedback regarding the same. > > 1. What are various ways to create a table in one database from > another database ? > I would say - Create table as select (over the database link) and > Export/Import in Table mode. These are the Best .. I would not go for any other method than this ... > > Any other ? > > 2. If a table has 30 Uniform Extents (no size specified) then under > what circumstances it is good or bad ? Basically - What is the > advantage of 30 extents over 1 big large extents and what are the > minuses ? > The Number of Extents do not directly Impact peformance of a Query. [A Delete / Truncate maybe]. The Only thing u should know is that DFMBRC does not go beyond an Extent when reading. > 3. What are various scenarios which make RMAN the best backup and > recovery tool ? The Best Thing i like abt RMAN is Block Level Backup and Block Level Recovery. You can never do this if you dont use RMAN. > > 4. what errors did u hit in your most recent DB Recovery procedure ? > Actually I never had to do a DB recovery from online backup so > far..Refreshes most of the time...But how to handle such a question ? I would be quite truthful to them. If you have not done a recovery than you have a very good stds in place. > > Thank you very much and Looking forward to hear from you soon. > Regards > >