DVD and RAM are not permanent storage devices.
Optical disk
DVDs or CDs
no,harddisk is not an optical storage
No, files can be erased from Read only discs with certain types of software. However, by doing this you can't put anything back on them like you can with a Re-Writeable disc.
optical
An Optical Disk
Optical Disk
optical disk storage are read only so they cannot get infected. But if you burn files which are infected by viruses then the optical disks can spread the virus
A CD-ROM ( Compact Disc- Read Only Memory ) is an Optical Type of Device. The reason of it being optical lies in the fact that its read/write head is optical in nature ( It uses a red colored light).
disc
No. A disk drive can use one of several methods of storing data, including magnetic, Flash, and optical.