Computers and Technology, 13.04.2021 05:00 levilugar
Suppose you are given a relation R with four attributes ABCD. For each of the following sets of FDs, assuming those are the only dependencies that hold for R, do the following: (a) Identify the candidate key(s) for R. (b) Identify the best normal form that R satisfies (1NF, 2NF, 3NF, or BCNF). (c) If R is not in BCNF, decompose it into a set of BCNF relations that preserve the dependencies.
1. C β D, C β A, B β C
2. B β C, D β A
3. ABC β D, D β A
4. A β B, BC β D, A β C
5. AB β C, AB β D, C β A, D β B
Answers: 1
Computers and Technology, 21.06.2019 20:40
Convert and simplify the following sentences to conjunctive normal form (cnf): (a) (p β (q β r)) β (p β (r β q)) (b) (p β§ q) β (Β¬p β q) (c) ((p β q) β§ Β¬q) β Β¬p
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Computers and Technology, 22.06.2019 10:00
Wich technology can a website use to allow you to listen to a concert live over the internet?
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Computers and Technology, 22.06.2019 17:20
[a] create a class called βcycleβ which has two instance integer variables as properties, βnumberofwheelsβ and βweight.β create a constructor with two parameters, using the same variable names in the parameter list. assign each variable to numberofwheelsβ and βweightβ respectively. write a separate application to test the class and display its properties. note: do not change the names of the instance variables or the variables listed in the constructorβs parameter list. [b] edit your class cycle by adding a default constructor which will assign the default values of 100 to represent the numberofwheels, and 1000 to represent the weight, by invoking a call to the other constructor. modify your application created in [a] to test the class.
Answers: 3
Computers and Technology, 22.06.2019 18:00
What is the first view you place in your drawing?
Answers: 1
Suppose you are given a relation R with four attributes ABCD. For each of the following sets of FDs,...
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