Reference no: EM13183079
#1. What is meant by data independence? Explain your answer.
#2. Identify two benefits of separating application software from the database management system.
#3. Design a relational database containing information about music composers, their lives, and their compositions. (Avoid redundancies similar to those in Figure 9.4)
#4. Suppose a sequential file contains 50,000 records, and 5 milliseconds are required to interrogate an entry. How long should we expect to wait when retrieving a record from the middle of the file?
#5. The chapter drew parallels between a traditional file index and the file directory system maintained by an operating system. In what ways does an operating system's file directory differ from a traditional index?
When would you choose to implement distributed databases, rather than local databases? Would you go for this design if all your computers were localized in one building? What if they are spread out in your country?
What would you recommend when they are spread worldwide? When would you mirror databases and when would you use databases tailored for the local environment?
What would you use as a hash function? Would your choice of a hash function depend on the language from which the words are chosen? Why should such a file not be stored as a sequential file?
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Explain reaction occurs and equilibrium is established
: A mixture initially contains A ,B ,C and in the following concentrations:[A] = 0.700 ,[B] = 1.35 , and [C] = 0.700 . The following reaction occurs and equilibrium is established:
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How many hours of work will be transacted
: It turns out that the city of Tucson cannot enforce the minimum wage very well and they cannot tell employers whom to hire. An underground market for jobs develops. The city has limited resources for enforcement, so that they can only catch employ..
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Problems like the flu-hurricanes-smallpox-mumps or rabies
: Is it the government's job to protect us from other problems like the flu, hurricanes, smallpox, mumps, or rabies? If it is the government's job to protect us from these problems, then what is the government's role in that protection? Isn't this wher..
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How much silk will american consumers purchase
: Consider the costs of the new American producers who produce silk only after the tariff is inplace. What area on the graph shows the amount by which their total costs are higher than thetotal revenue that foreign producers would receive to produce..
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What is meant by data independence
: What is meant by data independence? Explain your answer and identify two benefits of separating application software from the database management system.
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About the scientific analysis of language
: Structuralists grew more and more confident about the scientific analysis of language. what does it mean and why did they think like that?please introduce some references for me to read about the question.
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What is the money multiplier with a reserve ratio
: If people in Pantherville hold all money as currency, what is the quantity of money? b) If people hold all money as demand deposits and the Bank of Pantherville maintains 100% reserves, what is the quantity of money? c) If people hold equal amount..
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Business ethic models and social responsibility
: What are the differences between business ethic models and social responsibility of corporations Do you see these differences are being significant? Or could it be argued that there is no real difference or perhaps that CSR is just a type of business..
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What is the firms efficient scale of production
: d) Which input bundle represents efficient production of 100 units of output if the rental paid to capital is $25 and he wage paid to labor is $50? Round any decimals to the nearest hundredth. e) Derive the firm's cost function using the rental and..
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