unit 2 definitions and mult choice questions

SATA is an interface for connecting the _______ to a computer. Hard disk drive Scanner Mouse Printer

A

The Serial ATA (SATA) cables can extend up to ________. 1 meter 10 meters 5 meters 15 meters

A

Which of the following RAID levels does not provide fault tolerance? RAID 0 RAID 1 RAID 10 RAID 5

A

Which of the following does RAID 0 provide? Striping Disk mirroring Fault tolerance Striping with parity

A

What is the largest NTFS volume size supported, assuming a 64 KB cluster size as maximum? 256 TB 256 GB 2 TB 128 TB

A (A fixed number of clusters is supported by each operating system, leading to a corresponding maximum volume size. If the maximum NTFS cluster size of 64 KB is used, NTFS can support a single-volume size of 64 KB less than 256 TB. When a cluster size of one sector, or 512 bytes (1/2 KB), is used, the maximum volume size reduces to 2 TB)

What kind of media is most commonly used when large amounts of data need to be archived on a regular basis? Tape Optical disc External hard drive Network share

A (Although inefficient as an interactive medium, sequential tape-based storage continues to be developed in increasing capacities. Tape remains the best choice for frequently backing up large amounts of data for redundancy and archival purpose)

Which of the following is a concept that applies only to conventional magnetic hard disk drives and not newer solid-state drives? 7200 rpm Storage Capacity External attachment Access time

A (Each concept applies to both HDDs and SSDs except for platter spin rates. Revolutions per minute (rpm) measurements refer to drives with moving parts. SSDs have none)

Which of the following statements about dual-rail power supplies is least true? Dual-rail power supplies are less likely to be overdrawn by connected components. Dual-rail power supplies feature most of the same connections as a single-rail supply. Dual-rail power supplies have electrically separate 12VDC connections. Dual-rail power supplies typically support more cumulative amperage than single-rail supplies.

A (One drawback to dual-rail power supplies is that despite the fact that they supply more cumulative power, they offer less power on each individual rail than the single rail of other power supplies. As a result, it is easier to overdraw one of the two rails than it is to overdraw a single-rail power supply's rail because the two rails do not combine their power but instead offer it separately, thus reducing the relative output of each individual rail)

Which of the following is not a consideration when upgrading power supplies in a personal computer? You might find that your case has a non-removable power supply. You might find that you do not have a matching motherboard connector on your new power supply. You might find that you do not have enough of the appropriate connectors coming from the power supply for the devices that you have installed. You might find that your power rating is not adequate on the new power supply.

A (Personal computers do not have permanently installed power supplies. Like other electrical and electronic components, power supplies can and do fail on a regular basis. Permanently mounting a power supply to a chassis would be a disservice to the consumer. You should consider the cumulative power needs of your installed components, and you might have to obtain adapters and splitters if you do not have enough or you have the wrong types of connectors coming from the power supply.)

Which of the following RAID levels is used for mirroring? RAID 2 RAID 1 RAID 0 RAID 3

B

Which of the following platter spin rates is not commonly associated with conventional magnetic hard disk drives? 5400 rpm 12,000 rpm 10,000 rpm 7200 rpm

B (12,000 rpm HDDs were once produced in low quantities but were never common)

A client is looking for a desktop drive technology that saves money over SSDs but offers performance increases over HDDs and can be used to install the operating system. Which of the following is the best to recommend? eMMC SSHD Dual-drive technology Magnetic-only drive

B (A solid-state hybrid drive incorporates the features of both conventional magnetic only hard drives and solid-state drives. As a result, the performance of an SSHD exceeds that of a hard drive but costs less than the equivalent-sized SSD. A dual-drive option still requires the purchase of a full-sized SSD. Adding the cost of the SSD and the HDD, the dual-drive solution does not satisfy the requirement of an affordable technology.)

Which optical disc format supports a data capacity of 25 GB? Single-sided, single-layer DVD-R Single-sided, single-layer BD-RE Double-sided, double-layer DVD+R Double-sided, single-layer DVD+R

B (Blu-ray Disc-Recordable Erasable (BD-RE) is intended for high-density storage of high-definition video as well as data storage. In BD-RE, data can be written to and erased from the disc many times without compromising the integrity of the disc or the data stored on it. A single-sided, single-layer BD-RE disc holds up to 25 GB of data. A double-sided, double-layer DVD+R disc holds up to 17.1 GB of data, a single-sided, single-layer DVD-R holds up to 4.7 GB of data, and a double-sided, single-layer DVD+R holds up to 9.4 GB of data.)

What does the e stand for in eMMC? Enhanced Embedded Encoded Extended

B (The 'e' in eMMC stands for embedded. An embedded Multi-Media Controller (eMMC) is a storage component that contains flash memory and a flash memory controller integrated onto the same silicon die.)

What are the output voltages that have been commonly produced by PC power supplies over the years? (Choose five.) A)-3.3VDC B)+5VDC C)-5VDC D)+12VDC E)-12VDC F)+110VAC G)-110VAC H)+3.3VDC

B, C, D, E, H (A PC's power supply produces +3.3VDC, +5VDC, -5VDC, +12VDC, and -12VDC from a 110VAC input)

Which ATX version introduced an extra 4-pin, 12V connector, commonly called the P4 connector? ATX 12V 2.x ATX 12V 2.3 ATX 12V 1.0 ATX 12V 2.1

C

Which of the following RAID levels offers disk striping without parity? RAID 2 RAID 1 RAID 0 RAID 5

C

Which of the following types of RAID configurations provides the best speed in addition to fault tolerance at the lowest possible cost? RAID 0 RAID 10 RAID 5 RAID 1

C

What is the physical component where data is stored in a HDD? Cluster Read/write head Platter Sector

C (A conventional HDD contains discs called platters, on which data is stored magnetically through read/write heads by way of a magnetic coating.)

Which of the following best describes a hybrid drive? A drive that is partially internal and partially external A drive that can be used with Windows or Mac OS A drive that has both HDD and SSD components A drive that has a SATA interface as well as one other

C (Hybrid drives are named for their inclusion of traditional hard drive technology as well as newer solid-state technology. Hybrid systems can be all in one or comprise one drive of each technology. Special software is needed to optimize the hybrid drive's usage and performance.)

Of the following voltage pairings, which one accurately represents the input and output, respectively, of power supplies and AC adapters? AC in, AC out DC in, AC out AC in, DC out DC in, DC out

C (Power supplies and AC adapters use standard wall outlets for an input of AC voltage, which they convert to the DC voltages required by the components to which they supply power.)

Which technology is based on flash memory and is intended eventually to replace conventional hard disk drives that have moving discs and other mechanisms? USB flash drives Memory cards Solid-state drives Optical drives

C (Solid-state disks (SSDs) are capable of replacing conventional HDDs, contingent upon cheaper components and higher capacities)

What does RAID stand for? Redundant Array of Internal Disks Repeated Array of Inexpensive Disks Reversible Array of Inexpensive Disks Redundant Array of Independent Disks

D

What does SATA stand for? Sequential Asynchronous Technology Attachment Sequential Advanced Technology Automation Serial Advanced Technology Automation Serial Advanced Technology Attachment

D

Which of the following is not one of the three major components of a hard drive? Controller Hard disk Host adapter Drive interface

D ( Hard drives use a magnetic storage medium, and they are known as conventional drives to differentiate them from newer solid-state storage media. The hard drive contains three critical components: Controller: This component controls the drive. The controller chip controls how the drive operates and how the data is encoded onto the platters. It controls how the data sends signals to the various motors in the drive and receives signals from the sensors inside the drive. Hard disk: This is the physical storage medium. Hard disk drive systems store information on small discs (from under 1 inch to 5 inches in diameter), also called platters, stacked together and placed in an enclosure. Host bus adapter (HBA): This is the translator, converting signals from the controller to signals that the computer can understand. Most motherboards today incorporate the host adapter into the motherboard's circuitry, offering headers for drive-cable connections.)

Which of the following best describes the concept of hot-swappable devices? The device can be removed with power applied after it is properly stopped in the operating system. Care must be taken when swapping the device because it can be hot to touch. The device can be swapped while still hot, immediately after powering down the system. Power does not need to be turned off before the device is inserted or removed.

D (Hot-swappable devices can be removed while the power to the system is still on. Warm-swappable devices need to be stopped in the operating system before being removed. The term has nothing to do with the heat level of the device)

Which of the following statements about power supplies is true? You must make sure that the voltage selector switch on the back of the power supply is switched to the lower setting if the computer is going to be used in Europe. SATA hard drives most often use the same type of power connector that PATA hard drives use. Power supplies supply power to ATX-based motherboards with connectors known commonly as P8 and P9. Power supplies convert AC input to DC output.

D (PC power supplies accept alternating current as input and produce direct current for the internal components. Europe requires the voltage selector switch be set at the higher setting. SATA drives most often use a specific power connector that is not compatible with the Molex connector used by PATA drives. Legacy AT-based motherboards called for P8 and P9 connectors; ATX motherboards have a newer 20 or 24 pin single power connector.)

SATA has a data transfer rate of up to ________. 100 MB/sec 50 MB/sec 400 MB/sec 100 MB/sec 150 MB/sec

E

Controller

This component controls the drive. The controller chip controls how the drive operates and how the data is encoded onto the platters. It controls how the data sends signals to the various motors in the drive and receives signals from the sensors inside the drive. Most of today's hard disk drive technologies incorporate the controller and drive into one assembly. Today, the most common and well-known of these technologies is SATA.

Hard disk

This is the physical storage medium. Hard disk drive systems store information on small discs (from under 1 inch to 5 inches in diameter), also called platters, stacked together and placed in an enclosure.

Host bus adapter (HBA)

This is the translator, converting signals from the controller to signals that the computer can understand. Most motherboards today incorporate the host adapter into the motherboard's circuitry, offering headers for drive-cable connections. Legacy host adapters and certain modern adapters house the hard drive controller circuitry.

When replacing a power supply, which of the following tends to vary among power supplies and must be chosen properly to support all connected devices? Amperage Resistance Wattage Voltage

c (Power supplies are rated in watts. When you purchase a power supply, you should make sure the devices inside the computer do not require more wattage than the chosen power supply can offer. The voltage is fairly standard among power supplies, and it has nothing to do with the devices connected to the power supply. Amperage and resistance are not selling points for power supplies.)

Which of the following is not a consideration when installing an internal storage device? You should match the form factor of the drive or adapt it to an available drive bay or slot. You should secure the drive with at least two screws on one side and preferably two on each side. Due to the high revolutions at which modern hard drives spin, you must secure an external power source because the internal power supplies do not have the capacity. You need to be sure that the routing of the drive's ribbon cable, if applicable, does not obstruct the engineered flow of air across internal components.

c (Today's hard drives, regardless of their rpm, have standard internal power connections. Each of the other options are valid concerns when installing an internal drive.)