Which of the following is a storage devices that uses rigid, permanently installed magnetic disks to store data/information .........
Verified Answer
A. floppy diskette
B. hard disk
C. permanent disk
D. optical disk
E. None of these
Explanation:
A hard disk drive (HDD) uses rigid, rapidly rotating platters coated with magnetic material for data storage and is typically permanently installed within a computer system. Option (a) floppy diskette is magnetic but flexible and removable. Option (d) optical disk uses lasers, not magnetic disks. Option (c) 'permanent disk' is not a standard technical term for this specific technology. Thus, (b) is correct.