フリー問題

問題文

An update to a primary key is being traced through the trail, and the two fetch responses that answer for a row that could not be read are being compared. What is already true of that key update, and which default answers to which condition?

選択肢

1. The two images already share one record, so the folding may stand aside there, and ignoring answers a key that did not match, allowing answers a row that was gone
2. The two images take a record each, so the folding has its work to do there, and ignoring answers a key that did not match, allowing answers a row that was gone
3. The two images take a record each, so the folding has its work to do there, and allowing answers a key that did not match, ignoring answers a row gone
4. The two images already share one record, so the folding may stand aside there, and allowing answers a key that did not match, ignoring answers a row gone