How is offline synchronization handled when connectivity is restored?

How is offline synchronization handled when connectivity is restored?

• A. All changes are transmitted when back online.
• B. Changes are reconciled with central server.
• C. Local changes are discarded.
• D. Changes are queued locally and reconciled with central server on reconnect, preserving data integrity and order status.

Answer: (D)

Offline synchronization works by keeping changes locally in a queue while the device is disconnected, and then sending and applying those changes to the central server once connectivity is restored. This approach preserves the original order of actions (such as status updates) and ensures data integrity, because each local change is transmitted in sequence and reconciled with the server’s canonical data. The server merges the incoming changes with what already exists, resolving any conflicts and updating the shared state accordingly. This prevents data loss and keeps all users and devices in sync as soon as the connection returns. Discarding local changes would lose work; transmitting all changes without preserving order can cause inconsistencies or race conditions; reconciling without a local queue risks applying updates out of sequence.

Offline synchronization works by keeping changes locally in a queue while the device is disconnected, and then sending and applying those changes to the central server once connectivity is restored. This approach preserves the original order of actions (such as status updates) and ensures data integrity, because each local change is transmitted in sequence and reconciled with the server’s canonical data. The server merges the incoming changes with what already exists, resolving any conflicts and updating the shared state accordingly. This prevents data loss and keeps all users and devices in sync as soon as the connection returns.

Discarding local changes would lose work; transmitting all changes without preserving order can cause inconsistencies or race conditions; reconciling without a local queue risks applying updates out of sequence.