I will assume this is a windows computer
Answer:
- Disk (Letter)\Users\<"Answer">\Folder\Documents\SuspiciousFile.exe
- You can use Windows Security Logs to try and find out from what IP address the user you just found logged in from.
Explanation:
The windows user folder has folders that contain each users data, Using the file path of the suspicious file you can figure out which user is associated with the file.
Windows Security Logs collect data on logon attempts so when the user logs in their IP address should be collected in these log files.
Answer:
With the use of data and their types the extent of how much data can be stored can get insanely large. types like doubles and longs allow for a range of values nearly incomprehensible in their size for storing user information, web pages, games ect. Using them essentially allows you to plan for the future of the size of whatever you're creating. On top of that, it allows for a preciseness not typically able to be reached without these types.