5. Which of the following is a multi-tasking operating system?
A. MSDOS
B. UNIX
C. Windows 95/98
ols
D. Utility Software
6. Which of the following is not a secondary storage medium?
A. Read only memory B. Cartridge tapes
C. Magnetic disk
D. Magnetic tapes
7. Removable and rewritable electronic data storage device that can be plugged into almost any PC.
A. USB
B. Floppy Disk
C. Memory Cards
D. RAM​