Which feature of Microsoft Excel is used to automate the data entered in a defined sequence? 

The correct answer is Autofill.

Key Points 

• Autofill in spreadsheet applications, such as Microsoft Excel, provides an easy way to fill in empty cells. After entering information in one or two cells, you can drag the fill handle (the small box in the lower-right corner of the current selection) across multiple cells to automatically fill them in with similar data. Autofill can be used for both rows (horizontally) and columns (vertically).
• For example, if you enter "1" in cell A1, then drag the fill handle downwards, autofill will automatically fill in the selected cells with the number 1. If you enter "1" in A1 and "2" in A2, then select both A1 and A2, then drag the fill handle downwards, it will increment the values in the cells. A3 will become "3," A4 will become "4," etc. If you enter "2" in A1 and "4" in A2, the values will increment by two. For example, A3 will become "6," A4 will become "8," etc.

Additional Information 

• Autofill is a software function that automatically enters data in web forms and spreadsheets. It should not be confused with autocomplete or autocorrect, which perform separate functions. Autocomplete finishes words or phrases while typing, and autocorrect automatically fixes spelling mistakes.
• While both web browsers and spreadsheet applications support autofill, the functionality is different.