a cd
A DVD. Apex.
A credit card
Neither a DVD nor a CD would be affected by magnetic fields, because the information is digitally encoded using optical media.
It will quite possibly erase the data stored on the device.
why the magnet change the data from diskette?state the reason.
output
Digital Data is data that is stored in binary, and a Digital Device is any device that works with binary data
slowest device for data transfer
A direct data device is a device that can transfer data automatically from a document eg. a barcode reader reads a barcode
Depending on the specific technology you are thinking about, a phone may have data stored magnetically; a strong magnet may delete such data.
An input device is any device that enables feeding of information into a computer, including office data entry devices. An office data entry device is one that is purely used for keying in data into a computer e.g. a mouse and a keyboard.
Storage device