Android Software Engineer Interview Questions

8,350 android software engineer 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.

The test had several multi-choice questions and one coding challenge. This test had a time constraint. Technical Android interview had usual and mandatory questions about Android development. Nothing special. The System Design interview demanded designing a backend for a certain functionality of a mobile app. Yes, given the target position is Android dev, exactly the backend skills were assessed during this session.
avatar

Software Engineer - Android

Interviewed at Revolut

4
Dec 29, 2023

The test had several multi-choice questions and one coding challenge. This test had a time constraint. Technical Android interview had usual and mandatory questions about Android development. Nothing special. The System Design interview demanded designing a backend for a certain functionality of a mobile app. Yes, given the target position is Android dev, exactly the backend skills were assessed during this session.

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