In which places is the default keyword permitted to be used? (Choose two.)
B, E.
Package-private, or default, access is denoted by the absence of an access modifier, making Option A incorrect.
Option B is correct, since a switch statement can contain a default execution path.
Options C and F are incorrect because keywords in Java cannot be used as method or variable names.
The interfaces can contain default interface methods but they must be concrete with a method body.
Option E is correct and Option D is incorrect.