CDs, BDs, and DVDs come in several varieties. Please describe "ROM," "R," and "RW" versions of these types of media.
What will be an ideal response?
• Read-only (ROM) versions of CDs, DVDs, and BDs contain permanent data stored on the disc during the manufacturing process. Data on CD-ROMs, for example, cannot be changed or deleted. These discs are typically used to distribute software and movies.
• Recordable (R) discs contain a layer of color dye sandwiched beneath the clear plastic disc surfaces. A writable drive can store data on CD-R, DVD-R, and BD-R discs by changing the dye color. The change in the dye is permanent, so data cannot be changed after it has been recorded.
• Rewritable (RW or RE) discs contain a crystal structure on the disc surface. The crystal structure of CD-RW, DVD-RW, CD+RW, DVD+RW, and BD-RE discs can be changed many times, making it possible to record and modify data much like on a hard disk.
You might also like to view...
Verify that, for any pair of relations r and s, ? cond (r × s)=r × ? cond(s) if the selection condition cond involves only the attributes mentioned in the schema of relation s.
What will be an ideal response?
Which of the following is the best example of a rapid-onset disaster?
A. flood B. hurricane C. famine D. environmental degradation
A binary search is a process of what order?
a) O(log2 n) b) O(n/2) c) O(n) d) O(2n)
Explain how the Gedit text editor handles basic cut, copy, and paste operations when using Windows.
What will be an ideal response?