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Oracle Developer Interview Questions

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If a foreign key reference a parent key of the same table is called self-referential integrity constraint. 

In Circumstances, all of the data for a row in a table may not be able to fit in the same data block. When this occurs , the data for the row is stored in a chain of data block (one or more) reserved for that segment. 

An Extent is a specific number of contiguous data blocks, obtained in a single allocation, used to store a specific type of information. 

A segment is a set of extents allocated for a certain logical structure. 

Data Segment, Index Segment, Rollback Segment and Temporary Segment. 

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