Ch4 4: Data Storage and Sharing

Which kind of device stores data in patterns of magnetic polarity?

• DVD

• CD

• USB flash drive

• HDD

Answer explanation

A HDD (Hard disk drive) uses magnetic polarity to store data. DVD & CD are both optical, and a USB flash drive is a solid state.

Which unit of measurement describes approximately one trillion bytes of storage?

• Terabyte

• Gigabyte

• Megabyte

• Kilobye

Which of these is not an optical disc?

• DVD

• SSD

• BD-R

• CD-RW

Answer explanation

SSD stands for solid-state drive. All the others listed are opitcal discs.

How can a single DVD hold more than 4.7 GB of data? (Choose all that apply)

• Multiple actuator arms

• Multiple sides

• Multiple layers

• High-density recording

Answer explanation

A DVD can have multiple sides and multiple layers. Optical drives do not have actuator arms. DVDs cannot have higher-density recordings than the standard for DVDs

Which type of optical disc is rewriteable multiple times?

• DVD-ROM

• BD

• CD-RW

• BD-R

Answer explanation

Rewritable discs end in RW or RE. Discs that are not writeable end in ROM. Discs that are writeable only once end in R.

Which kind of drive reads CompactFlash storage?

• USB flash drive

• Card reader

• HDD

• SSD

Answer explanation

A card reader reads from a variety of flash memory cards, including CompactFlash. All other drive types listed contain their own storage and do not accept cards.

Which of these is not a benefit of SSD over HDD?

• Quieter

• Use less power

• Faster

• Less expensive

Which of the these is an external storage connection?

• ePATA

• eSATA

• PATA

• SATA

Answer explanation

eSATA is extrnal serial ATA. SATA and PATA are internal. There is no such thing as ePATA.

Which of these is an ad hoc network?

• PATA

• NAS

• RAID

• Direct link with crossover cable

Answer explanation

One kind of ad hoc network is a direct connection between two PCs using a crossover cable. PATA is a technology for internal local hard drive connection. NAS is network-attached storage. RAID combines multiple hard disks into a single logical pool of storage.

Which of these is a secure protocol for transferring files?

• SFTP

• FTP

• HTTP

• USB

Answer explanation

SFTP iis a secure form of File Transfer Protocol (FTP). HTTP is the protocol for web pages. USB is a type of eternal port on a PC.