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Suppose that we replace the wait and signal operations of monitors with a single construct await(B), where B is a general Boolean expression that causes the process executing it to wait until B becomes true.
a. Write a monitor using this scheme to implement the readers--writers problem.
b. Explain why, in general, this construct cannot be implemented efficiently.
c. What restrictions need to be put on the await statement so that it can be implemented efficiently? (Hint: Restrict the generality of B; see kessels [1977].)
Your task is to develop a database to support this activity.Here is what you need to be able to provide Custom Auto Body in order to land your first consulting contract:
Draw an ER diagram for database scenario. Design a set of 3NF tables for your database scenario.
Design a database for Ray. For each director, list his or her number and name and the year he or she was born. If the director is deceased, list the year of death.
Knowledge and Data Warehousing
Assume a game with two players, A and B, who raise one or both hands concurrently. A wins if total number of hands raised is odd, and B wins in other way.Write down the matrix form of the game. Is there a pure strategy solution? Explain your answer..
What kind of databases and database servers does MySpace use? Why is database technology so important for a business such as MySpace?
Energy in the home, personal energy use and home energy efficiency and Efficient use of ‘waste' heat and renewable heat sources
Need a system that networks its 3 campuses in the US and one campus in Singapore. Transaction data for all campuses should be available to all locations. In addition, students should be able to use the Internet to view classes, enroll, register, and ..
Write a query that performs an inner join of the grade, student, and grade_type tables using ANSI SQL 99 syntax (JOIN ON).
What about giving same name to attributes which are in different tables but are not same? For instance, "Description" in both a Course table and a Classroom table.
The first part is to create a database and some tables which will be appropriate for a home-budgeting application. That portion of the assignment should be completed from the MySQL console command line.
Draw an ER diagram for your database scenario. Design a set of 3NF tables for your database scenario.
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