Question

1 Compare the features of a CD and aDVD.
2 Explain the use of scanner.
3 Explain the features of a pen drive.​

Answer 1

Answer:

1.Digital Versatile Disc or Digital Video Disc (DVD) is similar to a CD-ROM in that you can only read data from it. The main difference is that the DVD can store much more data than a CD-ROM, CD-R, or CD-RW. ... The data on a DVD+RW disc can be erased and recorded over numerous times.

2.scanner is a device usually connected to a computer. Its main function is to scan or take a picture of the document, digitize the information and present it on the computer screen. *Note: The instructions for this scanner are specific to a brand and may vary for other brands and products.

3.Pen drive is usually rewritable, removable and much smaller than an optical disc. it is often used for data back- up, storage and transfer of computer files. Pen drives are faster, smaller, more durable and have more capacity compared to floppy disks and CDs.