Question 2

Cookies track the user.

Question 14

Single-user copies are for individual use and not for public use like in computer labs.

Question 26

B has the possibility of selecting the same student twice. D prevents that from happening.

Question 28

4 characters are removed, so it has to be len(oldString) - 4.

Question 35

For B, if scoreA>scoreC>scoreB then scoreC is incorrectly identified as winner. A prevents that.

Question 41

List must be sorted in order for binary search to work.

Question 50

Only polynomial efficiency indicates that an algorithm runs in a reasonable amount of time.