You can see the list of jobs by using the command:
The number that you see in square brackets  is the job id. This is different from process id. To bring a process to foreground, you can use
If jobs command lists following:
- Stopped tail -f mycmd.sh + Stopped top  Running sleep 1000 &
Which command will bring the "top" to the foreground?
15 Create File
17 Copy File