5.3.5 Practice Questions Optical Media

48x Explanation The read speed is 48x. When multiple numbers are listed together, the first number is the record speed, the second number is the rewrite speed, and the last number is the read speed. If the drive does not perform rewrite functions, the middle number will be omitted.
Explanation: The read speed of the drive is 32x.

Single-layer, single-sided Blu-ray disc. Explanation A Blu-ray disc has the greatest storage capacity of optical media. A single-sided Blu-ray disc holds up to 25 GB of data. Dual-layer or double-sided discs double the storage capacity. Experimental 20 layer Blu-ray discs hold up to 500 GB. Single-layer, single-sided DVDs hold about 4.7 GB. A dual-layer or double-sided DVD can hold up to 8.5 GB; a dual-layer, double-sided DVD can hold up to 17 GB.

BD-RE Explanation BD-RE is the Blu-ray standard which defines rewritable disks. BD-ROM is the read-only standard and BD-R is the recordable standard. R/RW is used to designate rewritable CD and DVD discs, not Blu-ray discs.
Explanation: The Blu-ray standard that defines rewritable disks is the BD-RE standard. This standard was developed by the Blu-ray Disc Association, and it defines the specifications for rewritable Blu-ray discs. The BD-RE standard is based on the DVD-RW format, and it allows for discs to be rewritten multiple times.

BD CD DVD Explanation Optical storage devices use lasers for both reading and writing information. The following are all optical storage devices: CD (Compact Disc) DVD (Digital Video Disc or Digital Versatile Disc) BD (Blu-ray Disc) HDDS (Hard Disk Drives) are magnetic storage devices. A flash device stores information using programmable, non-volatile flash memory. USB flash drive, SSDs (Solid state Drives), and SDHC memory cards are flash devices.
Explanation: An optical storage device is a data storage device that uses light to store and retrieve data. There are three main types of optical storage devices: CD-ROM, DVD-ROM, and Blu-ray Disc.

Compact Disc (CD)
Explanation: The first MP3 player was developed in the late 1980s to store digital music. The MP3 player was later adapted to store digital computer data. The MP3 player uses a compression algorithm to reduce the size of digital music files. This allows more music to be stored on the player. The MP3 player also has a built-in amplifier and speaker.

Compact Disc (CD)
Explanation: Disc surface made up of lands and pits. Reflective light used to interpret the data.The disc surface is made up of lands and pits, and reflective light is used to interpret the data. The light is reflected off of the surface of the disc, and the data is interpreted based on the intensity of the reflection.

Digital Versatile Disc (DVD)
Explanation: This is because single-sided discs only have one layer of data storage, while dual-layer discs have two layers. The more layers a disc has, the more data it can store.

Digital Versatile Disc (DVD)
Explanation: The red laser creates a crystal when it hits the bottom of the disc. This crystal then creates the reflective and non-reflective areas on the bottom of the disc. The reflective area reflects the laser back up to the top of the disc, while the non-reflective area allows the laser to pass through.

Blu-ray Disc (BD)
Explanation: Blue laser light has a shorter wavelength than other colors of laser light. This allows data to be packed more tightly on the disc. The shorter wavelength also allows the laser to focus more accurately on the data, which results in less data being lost during the writing process.

Blu-ray Disc (BD)
Explanation: The Blu-ray format was originally developed to provide high definition video content on movie discs. However, the format can also be used for data storage purposes. Blu-ray discs can store more data than standard DVDs, and the format is becoming increasingly popular for storing large amounts of data.

Compact Discs (CDs) were first developed store digital music. Later, the CD technology was adapted to store digital computer data. Data is stored on a CD's disc surface in a series of lands and pits. Reflective light is used to interpret the data on the disc. Digital Versatile Disc (DVD) is an optical media standard that can be used to store large amounts of different types of data ( computer, data, video, audio). Single-sided discs can hold about 4.7 GB of data. Dual-layer discs can hold up to 8.5 GB of data. A red laser causes a crystal to form which creates the reflective and non-reflective areas on the bottom of the DVD-RW disc. Blu-ray Disc (BD) was originally developed for high definition video (and expanded content on movie discs), but can also be used for data storage. Blu-ray uses a blue laser instead of the red laser used with CDs and DVDs. The blue laser light has a shorter wavelength, which allows data to be packed more tightly on the disc.
Explanation:The Blu-ray format was originally developed to provide high definition video content on movie discs. However, the format can also be used for data storage purposes. Blu-ray discs can store more data than standard DVDs, and the format is becoming increasingly popular for storing large amounts of data.