Assume that the variables named entry and number have starting values of 9 and 3 respectively. What is the value of entry after the following statements are executed? if ((entry > 9) || (entry/number == 3)) { entry--; } else if (entry == 9) { entry++; } else { entry = 3; }

Avariable definition defines the name of a variable that will be used in a program, as well as

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)?

Does read theory have answers keys ?