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What are the drawbacks of shadow-paging technique? The drawbacks of shadow paging is:- a) Commit Overhead b) Data fragmentation c) Garbage collection
What are the comparison operator in SQL? Comparison operator in SQL are =, LIKE and BETWEEN
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
Describe log based recovery The most usably structure for recording data base modification is the LOG the log is a sequence of log records recording all the update activities i
under what condition log based recovery is feasible?
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
Entities Let us first be aware of the question: What are entities? An entity is an object of concern used to show the things in the actual world, e.g., table, car, bo
Define physical and logical data independence. How does this architecture help in achieving these? Data independence entails that change in one view must not need a change in t
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Explain concurrency control? Concurrency control Oracles multiversion concurrency control varies from the concurrency mechanism used by some other data base vendors. Read
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