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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?
Name four attributes that you can use to define a data flow in the bus information system. Name four attributes that you can use to define a data store in the bus information system.
Why do you believe that views by themselves are insufficient for protecting access by unauthorized users?
Using data mining, it is possible to gather information which has been buried that can be manipulated and cross indexed which could be a valuable information gathering technique for entities.
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.
Can Oracle have multiple group functions in the same SELECT list of query (i.e can we do a COUNT and AVG)? Let us assume we wanted to find lowest, highest, average.
What is the key value of the 4th index record on the top level, assuming each index record points to the record with the highest key value in a block of the next level down?
Describe how to create a query in Access Query Wizard equilvant to the query: SELECT first, last, department, hours FROM payroll WHERE hours>.
Controls which need a database to either execute transaction completely or not at all.
Design a Database schema
Explain how much the modulating signal power is required to generate 100 percent modulation? What is the approximate center frequency of filter required to pass the lower sideband?
Illustrate relational algebra expressions for names of all salespeople, names of all salespeople having ORDER row and names of salespeople not having ORDER row.
To lock any other vertex, the transaction must have visited all the parents of that vertex and must be having a lock on one of the parents of the vertex. Show that the protocol ensures serializability and deadlock freedom.
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