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1) What are the responsibilities of the database administrator (DBA)? Could you outline the tasks that he/she has to perform, and what could be the consequences if these matters are not handled?
2) Compare the two non-sequential file structure models: the random (hashed) file and the index file. What advantages does the first one have over the second and what advantages does the second have over the first? What would be your criteria for choosing one over the other for different applications?
Compute a canonical cover for the above set of functional dependencies (show each step of your derivation with an explanation).
Write the following procedures: woman_wants_to_enter, man_wants_to_enter, woman_leaves, man_leaves, using counters and sychronisation techniques to ensure that the correct behaviour will occur.
To analyse a set of data, and write a memo, identifying and explaining your insights into the operation of Todd Restaurants.
Implement that entity as a database table with two subtypes, Games and Movie.
Your job is to create a database management system for bike shop who ‘buys' and ‘sells' new and second-hand bikes, and also parts of bike. Bike is constructed with parts while part can be fitted to different bikes.
Mark the following words in the document as index entries: behavior (four instances), favorable (five instances), and impression (eight instances).
List the students ID, name, GPA, and course Number such that all students have GPA greater than 3 . 5 and enrolled in a course in Jan 1, 2011. Find the names of all students who have GPA greater than 3.
A small business with 100 computer workstations is installing a new local area network. All of the users perform the usual operations of e-mail. State your reasoning. Draw a floor plan for each If possible, show both floor plans on one page.
Suppose a database has tables given below. Write the names and e-mail addresses for all customers who have had stove repair which cost more than $50.
What is Recovering a database via rollforward? What is aim of transaction log? What is contained in transaction log?
Using Join, list the items each customer ordered where the billing_price was lower than the item price (item, billing_price, and price). Sort the results alphabetically by customer name.
Energy in the home, personal energy use and home energy efficiency and Efficient use of ‘waste' heat and renewable heat sources
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