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WRITE SHORT NOTES ON INDEX STRUCTURE OF FILES?
There are two basic parts of indices
1. Ordered indices
2. Hash indices
Every technique must be evaluated on the basis of these factors:
Ø Ordered indices
Ø Primary index
Ø Dense and sparse indices
Ø Multilevel index
Ø Index update
Ø Secondary indices
B+-Tree index files
B+-Tree index structure is the most widely used of various index structures that maintain their efficiency despite insertion and deletion of data.
Ø Structure of B+-Tree
Ø Queries on B+-Tree
Ø Update on B+-Tree
Ø B+-Tree file organization
Ø B-Tree index files
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
The Conceptual Level or Global level The conceptual level presents a logical view of the complete database as a unified whole. It permits the user to bring all the data in th
Which sorting technique is used to sort databases, whose sizes are very big? Give one such algorithm. Why do sorting techniques like quicksort, insertion sort, etc. not applied
give some example real life situation where DBMS are most suitable
What are the parts of SQL language? The SQL language has various parts: data - definitition language Data manipulation language View definition Transaction contr
Explain what is Aggregation? Aggregation: Aggregation is an significant concept in database design whereas composite objects could be modelled during the design of database a
Competition entrants can be either Individuals, or Teams. A Team is usually sponsored by a business, and, in that case, the team members would all wear T-shirts with the sponsoring
What are deadlocks? How can they be avoided? Ans: Deadlock considers to a particular condition when two or more processes are every waiting for another to release a resource,
basic structure of xml
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
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