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What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
various techniques of hashing?
Explain controlled redundancy? Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.
Define Physical and Logical independence Ans: Physical data independence: The ability to modify physical level without causing application program to be rewritten. Logic
Key to represent relationship amongs tables is called ? A Key that represent the relationship between tables is called Foreign Key.
Define check point and its impact on data base recovery. Ans: There could be hundreds of transactions handled per minute, in a large on-line database system.
What is Nested Trigger? A trigger can also having INSERT, UPDATE and DELETE logic within itself, so when the trigger is fired because of data modification it can also cause ano
Define Database layer? The database layer defines the data formats used in the database.
What is NULL? Simply NULL means not in value.
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
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