Given a linked list of integers, write a function getUnique that removes all duplicates elements in the linked list and returns the new linked list of unique elements (The order does not matter) Example:
Input: 1->2-3->1->2
Output: 1->2->3

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 ?

Where can page numbers appear? check all that apply. in the header inside tables in the footer at the bottom of columns at the top of columns