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BOLC > A+ > Flashcards

A+ Flashcards

1
Q

What is the function of power supply?

A

to convert AC power into a higher voltage DC power

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2
Q

Which memory technology allows two memory modules to be accessed at the same time?

A

dual channel

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3
Q

what connects a keyboard or a mouse to a computer?

A

PS/2

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4
Q

what is a multimedia interface initially developed for TV?

A

HDMI

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5
Q

what is the connector for analog video?

A

VGA

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6
Q

what is the connector for coaxial cables?

A

BNC

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7
Q

what connects to devices using the Mini Display Port Adapter?

A

thunderbolt

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8
Q

What are two factors that must be considered when choosing a computer case?

A

the number of internal drive locations and the size of the motherboard and the power supply

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9
Q

a technician looks at a motherboard and sees a 24-pin connector. what component would connect to the motherboard through the use of a this 24-pin connector?

A

power supply

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10
Q

what electrical unit refers to the number of electrons moving through a circuit per second?

A

current

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11
Q

what characteristic of electricity is expressed in watts?

A

the work required to move electrons through a circuit multiplied by the number of electrons flowing through a circuit per second

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12
Q

which type of memory is primarily is primarily used as cache memory?

A

SRAM

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13
Q

which component controls the communications and interactions between the CPU and other components on the motherboard?

A

chipset

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14
Q

which two activities are normally controlled by the Northbridge part of the chipset?

A

access to the RAM, access to the video card

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15
Q

which unit of measurement is used to indicate the hard drive speed?

A

revolutions per minute

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16
Q

which type of interface was originally developed for high-definition televisions and is also popular to use with computers to connect audio and video devices?

A

HDMI

17
Q

which two devices are considered input devices?

A

biometric authentification device, digital camera

18
Q

what is indicated by the contrast ration of a monitor?

A

the difference in the intensity of light between the brightest white and darkest black that can be displayed

19
Q

what type of connector can be used to connect an internal hard drive to the motherboard?

A

SATA

20
Q

which two factors must be considered when replacing old RAM modules in a PC?

A

the new RAM must be compatible with the motherboard and the speed of the new RAM must be supported by the chipset

21
Q

which term is used to define the wires on a motherboard that move data from one part of a computer to another?

A

bus

22
Q

what a new PC is being built, which component has the most influence when selecting the case and power supply?

A

motherboard

23
Q

which two considerations would be of the greatest importance when building a workstation that will run multiple virtual machines?

A

amount of RAM, number of CPU cores

24
Q

a user playing a game on a gaming PC with a standard EIDE 5400 RPM hard drive finds the performance unsatisfactory. which hard drive upgrade would improve performance while providing more reliability and more energy efficiency?

A

an SSD

25
Q

what three components should be included in a computer that is used to create TV commercials and music videos?

A

specialized video card, large and fast hard drives, specialized audio card

26
Q

what are two hardware requirements for computers that will be used to run multiple virtual machines?

A

large amounts of RAM, a multicore CPU

27
Q

which security feature in modern CPUs protects memory areas that contain part of the operating system from malware attacks?

A

execute disable bit

28
Q

which RAID has the highest performance?

A

RAID 0

29
Q

Which RAID has data striping without redundancy?

A

RAID 0

30
Q

Which RAID has disk mirroring?

A

RAID 1

31
Q

Which RAID has high performance and high protection because all data is duplicated?

A

RAID 1

32
Q

Which RAID has a combination of data striping and parity?

A

RAID 5

33
Q

Which RAID has the ability of data to be rebuilt with information from other drives?

A

RAID 5

BOLC (13 decks)

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