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Consider the triangle classification specification. The system reads in three positive values from the standard input. The three values A,B, and C are interpreted as representing the lengths of the sides of a triangle. The system then prints a message to the standard output saying whether the triangle, if it can be formed, is scalene, isosceles, equilateral, or not a triangle. Develop a decision table to generate test cases for this specification.
Briefly explain the ARIES recovery algorithm, including the main phases, main principles and key ideas behind the algorithm such as WAL protocol and checkpointing etc.
Draw an object-oriented model for a small private airport database that is used to keep track of airplanes, their owners, airport employees, and pilots.
What is the cost of joining R and S using a page-oriented simple nested loops join? What is the minimum number of buffer pages required for this cost to remain unchanged?
Write a query to display the columns listed below. The query should list each customer once, whether they have rented a movie or not. Where the customer has rented a movie it should show only the first rental date. The output should be sorted by m..
The library System stores 3 type of informations: Users ( USID, USNAME, USMob, USEmail, USDept,USStartDate, NofBooks). Create the library database schema Structure.
Draw a diagram of, and explain the architecture of a system for serving up dynamic pages from a database. Show the protocols involved, the flow of messages and what types of information the messages contain.
For each of the following queries, which of the listed index choices would you choose to speed up the query? If your database system does not consider index-only plans (i.e., data records are always retrieved even if enough information is available i..
Create a schema that supports the company's business and processes. Explain and support the database schema with relevant arguments that support the rationale for the structure
Assume you are making a database to help university keep track of its course offerings. You might have following entities in database, as they are distinct items in real life.
Raw Data Representation and Interpretation
Prove that Armstrong’s Axioms are sound and complete for FD in-ference. That is, show that repeated application of these axioms on aset F of FDs produces exactly the dependencies in F+.
Consider a relation R with ?ve attributes ABCDE. You are given the following dependencies: A → B, BC → E, and ED → A.
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