Question 1

One of the most impressive aspects of optical media is its ability to record and store both analog and digital data.

Accepted Answer

False

Question 2

The primary difference between magnetic and optical media is that optical media is volatile.

Accepted Answer

The statement is false. Optical media, such as CD or DVD, is not volatile. It is non-volatile, meaning that data stored on it is not lost when power is removed. Magnetic media, such as hard disk drives or floppy disks, can be volatile if they are not properly shut down or if there is a power failure, resulting in data loss.

Question 3

CDs and DVDs are the same type of optical media.

Accepted Answer

CDs and DVDs are both types of optical media that store digital information. The main difference between the two is the amount of data they can store and the type of laser used to read/write the data. CDs typically hold up to 700 MB of data and use a red laser, while DVDs hold up to 4.7 GB of data (or more with double-layer discs) and use a blue laser.

Question 4

While the flow of digital data is measured in bits, all digital memory is measured in bytes.

Accepted Answer

This is because a byte is made up of 8 bits. Therefore, when measuring memory capacity, it makes more sense to use bytes rather than bits.

Question 5

Industrial-grade rubies are often used as the lens material for CDs and DVDs, accounting for the red color of common lasers.

Accepted Answer

The answer of Industrial-grade rubies are often used as the...

Question 6

Ordinary light, such as a light bulb, is referred to as&#10;A) coherent light&#10;B) incoherent light&#10;C) infrared&#10;D) both A and C

Accepted Answer

Ordinary light, such as a light bulb, is incoherent light. Coherent light is light in which the electromagnetic waves maintain a fixed and predictable phase relationship over a certain distance. Infrared refers to a specific range of wavelengths in the electromagnetic spectrum and is not a characteristic of ordinary light.

Question 7

What part of a videotape recording serves a similar function to perforations in film?&#10;A) guard band&#10;B) control track&#10;C) timecode&#10;D) video field

Accepted Answer

The control track in a videotape recording functions similarly to perforations in film by providing a way to maintain synchronization and control the speed of the tape during playback, much like perforations help control the movement of film through a projector.

Question 8

When a laser beam is directed from the laser source to an optical disk and energized, it creates a physical change in the structure of that disk known&#10;A) flat&#10;B) pit&#10;C) land&#10;D) all of the above

Accepted Answer

When a laser beam is directed at an optical disk and energized, it creates a physical change in the structure of the disk known as a "pit." This is in contrast to the unaltered areas called "lands."

Question 9

Which optical laser beam has the smallest wavelength, allowing it to read and record much more content on the same size disc than a laser with a bigger wavelength?&#10;A) blue-violent laser beam&#10;B) red laser beam&#10;C) yellow laser beam&#10;D) none of the above

Accepted Answer

The blue-violet laser beam has the smallest wavelength among the given options (around 405 nanometers), which allows it to read and record smaller pits on the same size disc than a laser with a bigger wavelength. This allows for higher data density and storage capacity on the disc.

Question 10

Grouping drives together in a system allows data to be duplicated on more than one drive and also allows for more storage than a single drive. This grouping can be arranged to decrease the amount of time it takes to record and reproduce files.

A) DATA
B) RAID
C) ROM
D) ESATA

Accepted Answer

RAID (Redundant Array of Inexpensive Disks) is the grouping of multiple drives together to improve performance, increase storage capacity, and provide data redundancy through data duplication.

Deck 20: Recording and Storage Formats