Category: computerscience

programming exercise – routing of telephone Programming exercise – Routing of telephone calls Description Some telephone operators have submitted their price lists including price per minute for different phone number prefixes. The price lists look…

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Show that the relation schemas produced by Algorithm 15.4 are Show that the relation schemas produced by Algorithm 15.4 are in 3NF. Show that the relation schemas produced by Algorithm 15.4 are

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Suppose that privilege (a) of exercise 24.32 is to be Suppose that privilege (a) of exercise 24.32 is to be given with GRANT OPTION but only so that account A can grant it to at…

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What naming conventions can you develop to help identify foreign What naming conventions can you develop to help identify foreign keys more efficiently? What naming conventions can you develop to help identify foreign

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Specify a template dependency for join dependencies. Specify a template dependency for join dependencies. Specify a template dependency for join dependencies.

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Suppose that a disk unit has the following parameters: seek Suppose that a disk unit has the following parameters: seek time s=20 msec; rotational delay rd=10 msec; block transfer time btt=1 msec; block size B=2400…

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Consider the relation R, which has attributes that hold schedules Consider the relation R, which has attributes that hold schedules of courses and sections at a university; R = {CourseNo, SecNo, OfferingDept, CreditHours, CourseLevel, InstructorSSN,…

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Suppose we want to create a linear hash file with Suppose we want to create a linear hash file with a file load factor of 0.7 and a blocking factor of 20 records per bucket,…

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Suppose that a static hash file initially has 600 buckets Suppose that a static hash file initially has 600 buckets in the primary area and that records are inserted that create an overflow area of…

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Why do spurious tuples occur in the result of joining Why do spurious tuples occur in the result of joining the EMP_PROJ1 and EMPLOCS relations of Figure 15.5 (result shown in Figure 15.6)? Why do…

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