Java: Java Modules (JPMS)

By not exporting internal packages. Frame the concept in practical terms so you can explain it during interview discussion.

JPMS prevents unauthorized access by allowing modules to export only specific packages. If a package is not exported, it isn't accessible outside its module, ensuring internal implementation details remain hidden. For instance, in an e-commerce app, the 'user.internal' package might not be exported to prevent unauthorized access to user data handling logic.