The fdisk program is used for partitioning hard disks from the command line.
Answer the following statement true (T) or false (F)
True
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The table Faculty has 60,000 rows, each row occupies 100 bytes, and the database page size is 4 k bytes. The table contains an attribute City, indicating the city in which a professor lives, there are 50 cities with names city10 ...city50, and professors are randomly distributed over the cities. Assuming that pages in the index and data ?les are 100% occupied, estimate the number of page
transfers required for the following SELECT statement in each of the cases listed below. ``` SELECT F.Id FROM Facu lty F WHERE F.City > ’city10’ AND F.City < ’city21’ ``` a. The table has no index. b. The table has a clustered B+ tree index on City. Assume a (nonleaf) index entry has 25 characters. c. The table has an unclustered B+ tree index on City. Assume an index entry has 25 characters. d. The table has an unclustered B+ tree index on (City, Id). Assume an index entry has 40 characters. e. The table has an unclustered B+ tree index on (Id, City). Assume an index entry has 40 characters.
In multiversion timestamp ordering, read operations can access tentative versions of objects. Give an example to show how cascading aborts can happen if all read operations are allowed to proceed immediately.
What will be an ideal response?
What is the minimum number of edges in a connected graph with n vertices?
a. n-1 b. n + 1 c. 2n d. 3n
Using relational algebra, create a view of all rooms in the Grosvenor Hotel, excluding price details. What would be the advantages of this view?
What will be an ideal response?