フリー問題

問題文

A column that should hold the moment of each tap arrives as text. Most rows read like a date followed by a clock time, but three rows in every thousand hold a bare decimal number left over from a spreadsheet, and a few hold nothing. What should the cleaning routine do?

選択肢

1. The cleaning routine applies the joining step to the column and quarantines the seasonal values in the holding table that the steward inspects each morning.
2. The cleaning routine applies the conversion step to the column and quarantines the unreadable values in the holding table that the steward inspects each morning.
3. The cleaning routine applies the conversion step to the column and quarantines the seasonal values in the holding table that the steward inspects each morning.
4. The cleaning routine applies the joining step to the column and quarantines the unreadable values in the holding table that the steward inspects each morning.