Android Support Library
Question
Support Library
Short interview answer
The Android Support Library was a compatibility library family. Its
android.supportartifacts are deprecated; AndroidX/Jetpack is the current replacement for new work.
Detailed answer
The historical libraries made newer APIs and behaviors available across older platform versions. A migration changes the package family, for example:
android.support.v7.widget.RecyclerView
→ androidx.recyclerview.widget.RecyclerView
Modern projects should use AndroidX, which replaced the old package namespace and continues to receive development. Do not mix old Support Library and AndroidX dependencies.