To have a file hold a list, it is necessary to
A). identify the records in the list
B). identify the name, width and type of the fields of each record.
C). decide which fields will be used as sort or index keys
D). All of the above
E). None of the above
1. What is the code for getting the current time?
3. Views can be used to show the results of computed columns.
4. Which one of the following does not describe a validating filter?
5. Which command is used to terminate all processes in your own system except the login shell?
6. The code of the R language has an extension?
7. Which of the following applies to a class rather than an object?