A+ Flashcards
What is the function of power supply?
to convert AC power into a higher voltage DC power
Which memory technology allows two memory modules to be accessed at the same time?
dual channel
what connects a keyboard or a mouse to a computer?
PS/2
what is a multimedia interface initially developed for TV?
HDMI
what is the connector for analog video?
VGA
what is the connector for coaxial cables?
BNC
what connects to devices using the Mini Display Port Adapter?
thunderbolt
What are two factors that must be considered when choosing a computer case?
the number of internal drive locations and the size of the motherboard and the power supply
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?
power supply
what electrical unit refers to the number of electrons moving through a circuit per second?
current
what characteristic of electricity is expressed in watts?
the work required to move electrons through a circuit multiplied by the number of electrons flowing through a circuit per second
which type of memory is primarily is primarily used as cache memory?
SRAM
which component controls the communications and interactions between the CPU and other components on the motherboard?
chipset
which two activities are normally controlled by the Northbridge part of the chipset?
access to the RAM, access to the video card
which unit of measurement is used to indicate the hard drive speed?
revolutions per minute
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?
HDMI
which two devices are considered input devices?
biometric authentification device, digital camera
what is indicated by the contrast ration of a monitor?
the difference in the intensity of light between the brightest white and darkest black that can be displayed
what type of connector can be used to connect an internal hard drive to the motherboard?
SATA
which two factors must be considered when replacing old RAM modules in a PC?
the new RAM must be compatible with the motherboard and the speed of the new RAM must be supported by the chipset
which term is used to define the wires on a motherboard that move data from one part of a computer to another?
bus
what a new PC is being built, which component has the most influence when selecting the case and power supply?
motherboard
which two considerations would be of the greatest importance when building a workstation that will run multiple virtual machines?
amount of RAM, number of CPU cores
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?
an SSD
