21. What are the differences between a floppy disk and hard disks?

22. Which DMA channel does the floppy drives use?

23. Explain the components that make a floppy disk?

24. A floppy disk can be accessed at what speeds?

25. Explain the Read/Write assembly of a floppy drive?

26. What is the error code 41 in reference to floppies?

27. Why floppy-disks are not used to store permanent data?

28. What are flash memories? Is a floppy-disk one?

29. Define a disk-controller?

30. What is the difference between format and delete in reference to a floppy disk?