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Write the following queries in relational algebra, using the university schema.
a. Find the names of all students who have taken at least one Comp. Sci. course.
b. Find the IDs and names of all students who have not taken any course offering before Spring 2009.
c. For each department, find the maximum salary of instructors in that department. You may assume that every department has at least one instructor.
d. Find the lowest, across all departments, of the per-department maximum salary computed by the preceding query.
Remember to state the business problem, articulate the current setup, explain how mobile and wearable devices are different, and how they benefit the business.
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The four management tasks (planning, organizing, directing, and evaluating) existed long before computers.
What feature in Windows Vista provides a permission dialog for Standard Users to enter administrator credentials to accomplish various tasks reserved for the latter group
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Write a program that accepts as input the mass,in grams, and density, in grams per cubic centimeters, and outputs the volume of the object using the formula: volume=mass/density. format your output to two decimal places
"Security Models and Cloud Operations" Please respond to the following: 1. Analyze the industry researched for each security model would be most applicable, and explain why you believe that to be the case. Identify the security models from your find..
Write programs to implement a Real Estate Presentation Center that shows no more than 50 houses.Your Task:1. Create a class called "House" that includesa) Private attributes: "houseID","price","size","address"b) A constructor that sets all attributes
Write a function whose job is to output some sequence of "interesting" #'s. The numbers should be separated from one another somehow so they don't all run together. This function may need to call another function, where the second function determines..
An example of a picture effect for images in PowerPoint 2007 would be
Write a Prolog program to solve the 6 by 6 Sudoku puzzle distributed in class. Do not use a solution downloaded from the Internet or elsewhere. Write your own. It should be designed along these lines
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