Mobile Engineering
Offline & Sync
6 practice questions. Free questions open a full answer guide; the rest unlock with Pro.
- If two devices edit the same record while offline and both sync later, how would a last-write-wins strategy resolve the conflict, and what are its downsides?
- Walk me through how you'd design the sync engine for an offline-first app so that a flaky or interrupted connection never corrupts data or applies a change twice.Go Pro
- You're building an offline-first feature where users edit the same records on multiple devices that sync when connectivity returns. How do you think about detecting and resolving conflicts?Go Pro
- How would you design a mobile app so a user can keep creating and editing data while offline, and have it sync once the connection comes back?Go Pro
- Two devices edit the same record while offline and both come back online. How do you decide which version wins, and what are the trade-offs of the strategies?Go Pro
- As an offline-first app's local dataset grows, how do you keep sync efficient so it isn't re-transferring everything or draining the user's battery and data on every reconnect?Go Pro
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