How do I restore code that is already uploaded in an arduino

Using Arduino Programming Questions
1

I have an Arduino nano, and I have some pre-uploaded code into it. Now I lost the file for this code, and I just want to know if there is any way to bring back that code from an Arduino.

Thanks,
Sid.

2

You may be able to extract the binary from the chip and then convert it to assembly, but you will not be able to recover the source code.

3

Oh ok, thanks for the quick response.