CBSE Class 9 Computer Applications
Question 21 of 72
Input and Output Devices — Question 4
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Question Question 4
Write the difference between a DVD and a CD.
| CD | DVD |
|---|---|
| CD stands for Compact Disc. | DVD stands for Digital Versatile Disc. |
| The storage capacity varies from 650 MB to 900 MB. | A DVD can hold 4.7 GB to 17 GB of data. |
| CDs are made of a polycarbonate disc with a reflective aluminum layer on one side. | DVDs are made of a polycarbonate disc with a reflective aluminum layer on both sides. |
| CDs are more likely to be scratched or damaged, which can cause data loss. | DVDs are more durable than CDs as they have a protective layer on both sides of the disc. |