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Consider a disk queue holding requests to the following cylinders in the listed order: 116, 22, 3, 11, 75, 185, 100, 87. Using the SCAN scheduling algorithm, what is the order in which the requests are serviced, assuming the disk head is at cylinder 88 and moving upward through the cylinders
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How to launch an app: steps to be successful? launching an app is a great idea, but itβs not that easy as we supposed to think. the majority of mobile applications donβt generate revenue because companies arenβt ready to be competitive. referring to our experience in successfully building and launching apps we hope to you omit these difficulties. we are going to talk about ideas, marketing, testing your product, its development, distribution and support. you will learn 8 product launch stages to succeed.
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Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?
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How is energy expended in active transport
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Consider a disk queue holding requests to the following cylinders in the listed order: 116, 22, 3, 1...
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