Android Lead Interview Questions

4,321 android lead interview questions shared by candidates

Esta me la pasó por escrito a través del chat: Can you explain how a mobile app should interact with a backend when performing operations that must be idempotent (e.g., sending a payment or submitting a form)? Please include how idempotency keys are generated, stored, and reused across retries.
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Android Developer

Interviewed at Revolut

4
Sep 11, 2025

Esta me la pasó por escrito a través del chat: Can you explain how a mobile app should interact with a backend when performing operations that must be idempotent (e.g., sending a payment or submitting a form)? Please include how idempotency keys are generated, stored, and reused across retries.

1. How inline class works internally ? 2. Static and dynamic internal working ? 3. CoroutineContext ? 4. SupervisorJob ? 5. Dispatcher.Unconfined ? 6. in and Out Generics ? 7. Sealed interface ? Why 8. Design pattern in android ? How factory works ? 9. Backpressure in RX ? 10. LaunchdEffect and DisposableEffect
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Senior Android Developer

Interviewed at EPAM Systems

4
May 30, 2024

1. How inline class works internally ? 2. Static and dynamic internal working ? 3. CoroutineContext ? 4. SupervisorJob ? 5. Dispatcher.Unconfined ? 6. in and Out Generics ? 7. Sealed interface ? Why 8. Design pattern in android ? How factory works ? 9. Backpressure in RX ? 10. LaunchdEffect and DisposableEffect

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