Google's “Director of Engineering” Hiring Test

I would agree with "metadata" answer being correct.

"Each inode stores the attributes and disk block location(s) of the filesystem object's data." [1] A file's "attributes" are independent of its storage. One could also argue the notion that a FS object's ACL are attributes of the file.

[1]: https://en.wikipedia.org/wiki/Inode

Except that anybody who actually does understand what an inode is and what it's for would say exactly what OP said.

No, because OP is describing an inode number, not an inode.