After a stream is opened, before it is used for input and output, it should be
a. declared
b. closed
c. checked to see if it opened correctly
d. none of the above
c. checked to see if it opened correctly
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Which of the following is the method you can use to determine whether a file exists?
a. the File class's canOpen method b. the Scanner class's exists method c. the File class's exists method d. the PrintWriter class's fileExists method
The DataTable object can be used to access individual fields within a database by using the ____________________ procedure.
Fill in the blank(s) with the appropriate word(s).
____ is not a relational operator.
A. == B. > C. != D. ||
You cannot use the ____________________ key to insert a row at the beginning or middle of a table; instead, you use the Insert Rows Above or Insert Rows Below command.
Fill in the blank(s) with the appropriate word(s).