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A functional dependency α→β is called a partial dependency if there is a proper subset γ of such that α γ→ β. We say that is partially dependent on α. A relation schema R is in second normal form (2NF) if each attribute A in R meets one of the following criteria:
• It appears in a candidate key.
• It is not partially dependent on a candidate key.
Show that every 3NF schema is in 2NF. (Hint: Show that every partial dependency is a transitive dependency.)
Given a string S of lowercase English letters, write a program to find the longest magic string than can be obtained by removing some letters of S. If there are more than one solutions, choose the longest magic string which is lexicographically small..
What is the location from which the 1st computer instructions are available on boot up?
Using one or more of the databases for Computer Networks and Cyber Security, search for peer-reviewed journal articles about the communication theory or by the name of the person you selected to see if communication research on that theory has be..
The documents must display an image and three buttons. The buttons should be labeled simply 1, 2, and 3. When pressed, each button should change of the image to that of a different image.
Organizations around the world often assess their IS security mechanisms and practices by using the Trusted Computer System Evaluation Criteria (TCSEC) or Information Technology Security Evaluation Criteria (ITSEC). The two standards are similar, tho..
Assignment Preparation Activities include completing independent student reading and research. Assignment
Fully web-based access for both general public and Secretary of state employees a database of drivers and their personnel information contained on their drivers licenses
List and define the three basic interfaces enabled by the operating system. How do computer systems minimize memory fetches? Describe the difference between assemblers, compilers and interpreters. What is a transaction manager
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Specifically, for the Session Long Project for this Module, you are to review the Mitnick Security Consulting website [available at http://mitnicksecurity.com/]. Kevin Mitnick was for a number of years one of the most successful bad-guy hackers in th..
Determine the coefficient of static friction between the friction pad at A and ground if the inclination of the ladder isθ = 60 ° and the wall at B is smooth.
What are the three most important deliverables in scope definition? What are some benefits and potential problems in using an abrupt cut-over conversion and in using a parallel conversion strategy?
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