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Explain the Weak Entity Set
An Entity set which does not have sufficient attribute to make a primay key is known as weak entity set. For instance, dependents of an employee in an organization do not comprise an identifying attribute.
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
Discuss the mechanism to read data from and write to a disk? Disk read/write heads are mechanisms in which read data from or write data to disk drives. The heads have gone by
multidimensional data model
Concurrency Identification While designing analysis, model we map real world model into our analytical model. Real life objects are simultaneous in nature, but all the design
What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
WHAT IS DBMS
losers with new information systems
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