Question

The magnetic recording technique used for storing data onto the disks (floppy disks) is called

(a) return to zero

(b) non-return to zero

(c) return to zero and Non-return to zero

(d) none of the mentioned

I had been asked this question during an online interview.

This intriguing question originated from High Storage Capacity Memory Devices in division DMA, Floppy Disk and CRT Controllers of Microprocessor

Answer 1

Correct answer is (b) non-return to zero

The best I can explain: In this technique, the magnetic flux on the disk surface never returns to zero, i.e. no erase operation is carried out.