When did John Napier develop logarithm?

Mostly which of the following device is used to carry user files?

A. Floppy Disk

B. Hard Disk

C. RAM

D. CDROM

Which device is used to backup the data?

A. Floppy Disk

B. Tape

C. Network Drive.

D. All of the above

In order to play and hear sound on a computer, one needs:

A. a sound card and speakers

B. a microphone

C. all of them required

D. none of them required

Which of the following are the cheapest memory devices in terms of Cost/Bit?

A. Semiconductor memories

B. Magnetic Disks

C. Compact Disks

D. Magnetic Tapes

Which of the following are the best units of data on an external storage device?

A. Bits

B. Bytes

C. Hertz

D. Clock cycles