Question #1 Dropdown
Choose the word that makes each sentence true.
Asking the user for four numbers is an example of.

Finding the average of the four numbers is an example of.
Telling the user the average is an example of.

O input
O output
O processing

Amedian in the road will be marked with a white sign that has a black arrow going to the left of the median. true false

On early television stations, what typically filled the screen from around 11pm until 6am? test dummies test patterns tests testing colors

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)?