Index holes can be found on floppy disks. They are small holes and they are punched into the floppy disk. Their purpose is to mark where the sectors on each track should start. A person familiar with floppy disks would be able to answer this question.
Before the technology of sharing data digitally through emails or through the cloud, floppy disks were used. They were thin, flexible disks that were in the shape of a square. Different types of data, such as files, were stored on the floppy disks and they would be inserted into a device that had a floppy disk drive.
The first and second stroke index holes have to be positioned close to the middle of each nine, and the first six holes should not be allotted to adjacent holes. The 7th to the 10th stroke guide holes should be distributed so that a player obtaining ten strokes does not receive strokes on three consecutive holes.
Typically, the table is included on the scorecard and lists each hole's stroke index, a number from one to eighteen. Handicap strokes are given at holes where the stroke index of the hole is less than or equal to the number of strokes provided.