Which of the following are valid Java identifiers?
Choose all that apply
A. A$B B. _helloWorld C. true D. java.lang E. Public F. 2020_s
A, B, E.
Option A is valid because you can use the dollar sign in identifiers.
Option B is valid because you can use an underscore in identifiers.
Option C is not a valid identifier because true is a Java reserved word.
Option D is not valid because the dot (.) is not allowed in identifiers.
Option E is valid because Java is case sensitive, so Public is not a reserved word and therefore a valid identifier.
Option F is not valid because the first character is not a letter, $, or _.