COMPUTER FUNDAMENTALS

Detailed explanation-1: -Compact disks are known as optical storage devices. Data is burned onto the surface of the disk using a laser beam in the CD drive. A laser beam is also used to read the data stored on the disk. A typical CD can store around 650 Mb of data-equivalent to 450 floppy disks.

Detailed explanation-2: -A CD-ROM (compact disc read-only memory) is a type of optical disc that users can read but not write or erase. They typically hold from 650MB to 1GB of data.

Detailed explanation-3: -The correct answer is Hard disk.

Detailed explanation-4: -CD-ROM, abbreviation of compact disc read-only memory, type of computer memory in the form of a compact disc that is read by optical means. A CD-ROM drive uses a low-power laser beam to read digitized (binary) data that has been encoded in the form of tiny pits on an optical disk.