Which Systems Should I Use?

R has many OOP frameworks, some of which are better than others. Test your ability to choose an appropriate framework by deciding which of the following statements is true.

1. Knowing how to use S3 is a fundamental R skill.
2. R6 and ReferenceClasses are powerful OOP frameworks.
3. If it’s good enough for ggplot2, it’s good enough for me. I should make regular use of proto.
4. I should use any framework with a number in its name.
5. S4 is useful for working with Bioconductor.