32bit v. 64bit Oracle

Can you upgrade an Oracle 8.0.5 32bit database on HPUX11 to Oracle 8.1.6 64bit?

Is is possible to have 8.0.5 32 bit and 8.1.6 64 bit on the same box if the box is 64 bit?

If you wanted to restore a copy of production to dev and production was 64 bit and dev was 32bit, would you still be able to do the restore
(using Veritas Netbackup)?

What are the advantages of being 64 bit versus 32 bit?

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Author: Connie Milliken
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