What is CD-ROM function?
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. The drive then feeds the data to a computer for processing. The standard compact disc was introduced in 1982 for digital audio reproduction.
What is the memory of CD-ROM?
A CD-ROM holds between 650-700 megabytes (MB) of data, meaning it has enough memory to store approximately 300,000 pages of text.
Which of the following is read only disc?
Discussion Forum
| Que. | Which of the following is READ only disc? |
|---|---|
| b. | DVD-ROM |
| c. | DVDRW |
| d. | CD-R |
| Answer:DVD-ROM |
What is the difference between CD-ROM and disc?
A Compact Disc Read Only Memory (CD-ROM) is a read-only disc. These types of disks are created commercially and you cannot save data to them once they have been created. A Compact Disc Recordable (CD-R) is a Write Once Read Multiple (WORM) disc. A Compact Disc Re-Writable (CD-RW) is an erasable disc that can be reused.
How data is read from a compact disk?
The surface of the CD contains one long spiral track of data. The CD drive shines a laser at the surface of the CD and can detect the reflective areas and the bumps by the amount of laser light they reflect. The drive converts the reflections into 1s and 0s to read digital data from the disc.
How is a CD read?
What do you mean by read only optical disk?
read-only optical media Optical storage media that cannot be written by the user but that carry data imprinted during manufacture, usually by pressing from a master disk.
What is disc read?
Disk read/write heads are the small parts of a disk drive which move above the disk platter and transform the platter’s magnetic field into electrical current (read the disk) or, vice versa, transform electrical current into magnetic field (write the disk).
What is read only storage?
A read-only file or storage device contains data that cannot be modified or deleted. While data can be accessed or “read” from a read-only file or device, new data cannot be added or “written” to the device. For example, DVDs and CD-Rs are permanently read-only once the initial data has been written to the disc.
In what form does a compact disk store data?
CD data are stored as a series of tiny indentations known as “pits”, encoded in a spiral track molded into the top of the polycarbonate layer.
