Asystem administrator is selecting an operating system for use by the company’s research and development team. the team requires an os that can be easily modified and changed to meet its particular requirements. which of the following operating systems will be the best choice for the users?

a. windows 10 enterprise
b. mac os x
c. linux
d. windows 7 professional

The fourth generation of computers emerged between 1970s and 1980s. which technological advancement brought about this generation of computers? which computer architecture was used most in this generation?

Iam a bacterium. i cause stomach cramps and diarrhea. i am caused by eating rotten foodssuch as chicken, fish, or eggs. sometimes turtles carry my bacteria.what am i?

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)?