Two tasks that are operating ________ are executing simultaneously.

It is most common to change the ________ data type to ________

A) Text, Memo B) Double, Integer C) Date, Double D) Memo, Long Text

Which of the following statements are true?

``` a. If a file (e.g., c:\temp.txt) does not exist, new File("c:\\temp.txt") returns null. b. If a directory (e.g., c:\liang) does not exist, new File("c:\liang") returns null. c. If a file (e.g., c:\temp.txt) does not exist, new File("c:\\temp.txt") creates a new file named c:\temp.txt. d. If a directory (e.g., c:\liang) does not exist, new File("c:\liang") creates a new directory named c:\liang. e. None of the above. ```