For questions 16-22, answer "A" if the statement is a true data flow diagramming rule, and answer "B" if the rule is false.

16. Data can move directly from one data store to another data store.

17. A process has a noun phrase label.

18. A data flow to a data store means update. 1

19. Data can move directly from an outside source to a data store.

20. A join in a data flow means that the same data comes from any of two or more different processes, data stores, or sources/sinks to a common location.

21. Data cannot move directly to an outside sink from a data store.

22. A fork in a data flow means that the same data goes from a common location to two or more different processes, data stores, or sources/sinks.