Exercise

The Final Countdown

What are good uses of a finalize() method for your R6 class? Choose all the options that apply.

Closing connections to a database.
Removing all objects in the global environment.
Reverting settings to global options() or graphics par()ameters.
Forcing a garbage collection.

Instructions

50 XP

Possible Answers

1 and 4.
1 and 2.
3 and 4.
1 and 3.