問題文
Two names in different directories refer to the same file, and both names must keep working even if one of them is removed. The two directories are on the same filesystem. Which kind of link satisfies this?
選択肢
- A mount point placed at the second location, making the same file reachable through the new path.
- A hard link, because the additional name refers to the same inode and the data survives as long as at least one name remains.
- A symbolic link, resolved from either direction, so removing either name leaves the other able to reach the data.
- A copy of the file in the second directory, because two independent files are the safest way to ensure that neither name can be lost.