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Computers and Technology, 18.03.2021 01:20 AM28
Write a C program to take n files containing strings in ascending order (no duplicates within a file) and produce a file out. dat containing a line for each string (in ascending order). Even if a string str appears in multiple files, it should be output only once and, for each string, you should also output the number of files (k) containing the string. This should be done using code similar to: fprintf(outfp,"%s %d\n",str, k);
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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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Write a C program to take n files containing strings in ascending order (no duplicates within a file...
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