1.

What is the difference between HDAM and HIDAM databases?

Answer»
HDAM databaseHIDAM database
HDAM databases do not have a separate index file. The key field in these files are passed through a RANDOMIZER and that places the record in its specific position in the databaseHIDAM databases have their own separate file indexes and they are based on the root SEGMENT. Each file has a piece of INFORMATION about the pointer that shows the position of the data.
2. What is meant by REFERENTIAL integrity?

Referential integrity is a rule that states that there NEEDS to be followed between the primary and foreign keys. This means that every foreign key needs to have a specific primary entry key


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