As people have already written that while deletion the file's entry in the File Allocation Table is removed, but the file(or the bit pattern in the hard disk) is still physically present in the hard disk.
For storing data on the disk the disk needs to be divided into tracks and sectors. Formatting does this. So when the disk is formatted, new tracks and sectors are made and a new file system is made along with the FAT. Theoritically it is possible to recover the file from the hard disk even after formatting as the bit pattern of the file is still physically there. Only new tracks and sectors have been made on the disk. But I dont know if it is possible practically.
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