フリー問題

問題文

A verdict on a file is fetched by the fixed-length value computed over the whole of its contents. What follows for a file that differs from a known bad one by a single byte?

選択肢

1. The value computed over it differs as well, so the verdict held against the known bad file is not returned for it, and the design has to fall back on something other than that value to judge it
2. The value computed over it stays the same, so the verdict held against the known bad file is returned for it as well, and the design has to fall back on something other than that value to judge it
3. The value computed over it differs as well, so the verdict held against the known bad file is returned for it under a second value derived from the first one by the same rule
4. The value computed over it stays the same, so the verdict held against the known bad file is returned for it as well, and the design need not look past that value to judge near copies