Tuesday 25 December 2012

Chapter 7

Discovering Computers 2011 : Living in a Digital World Answers

True/False

1.   True
2.   False
3.   False
4.   False
5.   False
6.   True
7.   False
8.   True
9.   False
10. True
11. False
12. False
13. True 


Multiple Choice
 1. B
2. C
3. D
4. D
5. A
6. C
7. B
8. B 


Matching
1.   H
2.   C
3.   A
4.   E
5.   F
6.   J
7.   D
8.   B
9.   I
10. G


Short Answer
1. A network attached storage (NAS) device is a server connected to a network with the sole purpose of providing storage.

Home and small business users can add up to 6 TB or more of hard disk storage space to their network with a NAS device.

2.  The advantages of SAS (serial-attached SCSI) include thinner, longer cables; reduced interference; less expensive; support for many more connected devices at once; and faster speeds.

SAS interfaces support connections to optical disc drives, printers, scanners, digital cameras, and other devices.

3. A single-session disc means manufacturers write all items on the disc at one time. rather than Multisession means you can write on part of the disc at one time and another part at a later time.

The purpose of archive discs and Picture CDs is to preserve their photos.

4. Users use memory cards because memory cards enable mobile users easily to transport digital photos, music, or files to and from mobile devices and computers or other devices.

Five types of memory cards are:
1. CompactFlash (CF)

CF has a storage capacity of 512 MB to 100 GB. It’s use for Digital cameras, smart phones, PDAs, photo printers, portable media players, notebook computers, desktop computers.

2. Secure Digital (SD)

SD has a storage capacity of 512 MB to 8 GB. It’s use for Digital cameras, digital video cameras, smart phones, PDAs, photo printers, portable media players. 

3. SDHC.

It has a storage capacity of 4 to 32 GB.
It’s use for Digital cameras. Fourth, microSD has a storage capacity of 1 to 2 GB. It’s use for Smart phones, portable media players, handheld game consoles, handheld navigation devices. Last is microSDHC, it has a storage capacity of 4 to 16 GB. It’s use for Smart phones, portable media players, handheld game consoles, handheld navigation devices.

5. The one difference between microfilm and microfiche is that Microfilm is a 100- to 215-foot roll of film. Microfiche is a small sheet of film, usually about 4 X 6 inches.

Microfilm and microfiche use is widespread, with many companies allowing you to search through and view microfilm images online. Libraries use these media to store back issues of newspapers, magazines, and genealogy records. Some large organizations use microfilm and microfiche to archive inactive files. Some banks use them to store transactions and canceled checks. The U.S. Army uses them to store personnel records. 

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