問題文
A retailer keeps a warehouse copy of Salesforce customers current by consuming change notifications, and adds a weekly full comparison to repair anything the feed missed. The team asks how the two should be designed to coexist, since the comparison will run while the feed is still delivering. What should the design specify?
選択肢
- That the feed is stopped while the comparison runs and resumed afterwards.
- That the comparison writes its repairs to a separate staging area for a person to review before they are applied, so that no automated process can overwrite a value that the live feed has just delivered and the warehouse team retains control over every correction that is made to their copy.
- That both paths apply changes by the source record's own last-modified value and can be applied twice without changing the result, so a repair and a live message about the same record cannot leave the copy in the wrong state.
- That the comparison replaces the whole copy each week.