The Live Tiles feature in Windows 8 give users a constant stream of information, but the user can also switch the option off

Associations in a class diagram that have no navigability arrows at all indicate:

a. That the two classes are the same. b. Inheritance from the same base class. c. That navigation can proceed in either direction across the association. d. That operations performed by this association do not return values.

###### in a cell means that the ____________.

A. formula contains an error B. value contains an error C. label has a spelling error D. column is too narrow to display the value completely