COMPUTER HARDWARE
STORAGE DEVICES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
O binary
|
|
|
1 binary
|
|
|
A in hexadecimal
|
|
|
b in hexadecimal
|
Detailed explanation-1: -Reflected light (lands) represents a binary ‘1’, and no reflection (pits) represents a binary ‘0’.
Detailed explanation-2: -An optical disc is a flat, usually circular disc which encode binary data in the form of pits and lands on a special material on one of its flat surfaces. The lands represent “1” and the pits represent “0” in binary computing.
Detailed explanation-3: -3.3 Metal (Reflective) Layer. The metal layer in optical discs reflects the laser beam back to the laser photosensor in the laser head. Three types of reflective metals are typically used for this layer: aluminum, gold, and silver or silver alloy.
Detailed explanation-4: -An optical disk drive uses a laser beam to read the data from the disk as it is spinning. It distinguishes between the pits and lands based on how the light reflects off the recording material.