フリー問題

問題文

One script has to serve fourteen departments without being edited for each of them. Which approach fits and what does the other one force?

選択肢

1. A supplied variable fits because the database keeps the value for the whole session while a literal written into the text is discarded after each statement.
2. A substitution variable fits because the value is supplied at run time while a literal written into the text forces a separate copy of the script for each department.
3. A literal written into the text fits because the value is supplied at run time while a substitution variable forces a separate copy of the script for each of the departments.
4. A replaced variable fits because the value is supplied at run time while a literal written into the text requires the statement to be parsed again every separate time.