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How does the system cope up with a record crash when recovery is going on after the first crash? Ans: In a system the undo and redo operations are needed to be idempotent to c
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
i am required to come up with entities relationships, optionality and cardinality from a scenario. there is a night club and bookings for a musician band
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
explain participation constraints with examples
What is candidate key? Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.
Define an abstraction by which relationships are treated as higher level entities Ans: Aggregation. It is an abstraction by which relationships are treated as higher level
Give two profit of Reuse of Code. Reusing the implementation . Place existing class directly inside a new class. The new class can be made up of any number and type of the oth
What is catalog in DBMS? Catalog - A relational DBMS maintains information about every table and index in which it contains. A catalog is a collection of special tables that st
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