Yoda Response: Experience with Java and Kotlin, extensive it is. In Android development, both languages I have used. Challenges faced, I have, such as migrating legacy code from Java to Kotlin. Overcame this by understanding Kotlin’s interoperability with Java and refactoring code incrementally, I did. Also, optimizing app performance with Kotlin Coroutines, a challenge it was. Resolved by thorough testing and profiling, I did.