الموضوع: [مناقشة] : IT Essentials v5 ch1
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قديم 11-26-2013, 03:37 PM   #1
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تاريخ التسجيل: Nov 2013
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افتراضي IT Essentials v5 ch1


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1
What are two factors that must be considered when choosing a computer case? (Choose two.)
the size of the monitor
the vendor that manufactured the motherboard
the number of external or internal drive locations
the size of the motherboard and the power supply
the number of LED indicators at the front of the case

2
What are the two connector types for the 1394a interface? (Choose two.)
2-pin
4-pin
6-pin

8-pin
9-pin
15-pin

3
What is a function of a KVM switch?
digitizes an image or document and sends the information to multiple computers
stores images from both digital still cameras and digital video cameras on magnetic media
provides capability to share a keyboard, a mouse, USB devices, and speakers with multiple computers
provides biometric identification to an individual user by the use of fingerprints, voice recognition,or a retinal scan

4
A student has passed the CompTIA A+ certification exam. Based on this passing score, for which job is the student now qualified?
network associate
security technician
network technician
network professional
PC hardware and software technician

5
Which type of ROM can be reprogrammed with software while it is still physically installed in the computer?
EEPROM
EPROM
PROM
ROM

6
Which type of computer resources are direct lines to the processor and are used by computer components to request attention from the CPU?
DMAs
I/O addresses
IRQs
memory addresses

7
Which three devices are considered output devices? (Choose three.)
fingerprint scanner
headphones
keyboard
monitor
mouse
printer

8
Which technology would be best to use for drive redundancy and data protection?
CD
DVD
PATA
RAID
SCSI

9
Which two devices are considered input devices? (Choose two.)
biometric authentication device
printer
digital camera
projector
speakers

10
Which two form factors are commonly used to build a new computer? (Choose two.)
BTX
NLQ
ATX
CLV
ECC

11
What is the function of a fan on top of a heat sink?
to cool the memory modules
to move the heat away from the CPU
to draw cool air into the computer case
to provide a water-cooling system for extremely fast CPUs

12
Which important feature is offered by the USB standard?
A single USB connection to a computer can support up to 255 separate devices.
It offers rates of around 580 Mb/sec in low-speed mode.
It allows up to 920 Mb/sec in the 2.0 version.
It can supply power from the computer to devices.

13
Which three system resources are commonly used for communication between the CPU or memory and other components in the computer? (Choose three.)
IRQ
DMA
UDP
I/O address
USB
PnP

14
Which memory module has a front side bus speed of 200 MHz?
DDR-333
DDR-400
DDR3-667
PC100 SDRAM

15
A technician receives a complaint of poor image quality after the user changes the native resolution. While investigating the complaint, the technician discovers there is a mismatch between native mode and the native resolution of the peripheral. Which item is configured incorrectly?
DLP
LCD
printer
scanner

16
What is a function of the operating system in a computer?
It defines the physical components in the computer.
It instructs the computer how to process information.
It provides instructions on how to access the Internet.
It identifies the type of firmware that is installed in the computer.

17
A technician creates a simple circuit that has a 9 V light bulb attached to a 9 V battery. The power output of the light bulb is 100 W. Which equation should be used to calculate how much current in amps is required to achieve the full 100 W output from the 9 V bulb?
I = P/V = 100W/9V = 11.11A
I = P*V = 100W*9V = 900A
I = (P/2)*V = 50W*9V = 450A
I = P*2*V = 100W*(9V + 9V) = 8100A

18
Refer to the exhibit. Based on the advertisement that is shown, what is the native resolution of this computer system?
8x
3 GB
2.0 GHz
1919 MB
1280 x 800
13.35 x 9.57

19
Which IEEE standard defines the FireWire technology?
1284
1394
1451
1539

20
How many FireWire devices can be supported by a single FireWire port?
12
25
32
54
63
127

21
Which type of memory is primarily used as cache memory?
DRAM
RAM
ROM
SRAM

22
Which two considerations would be of the greatest importance when building a workstation that will run multiple virtual machines? (Choose two.)
high-end sound card
number of CPU cores
water cooling
powerful video card
amount of RAM

23
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 using less power?
a 7200 RPM SATA hard drive
a 7200 RPM EIDE hard drive
an SSD
a 10,000 RPM SATA hard drive

24
Which hardware upgrade would allow the processor in a gaming PC to provide the optimal gaming performance?
a fast EIDE drive
large amounts of fast RAM
liquid cooling
a high capacity external hard drive

25
Which two storage devices use a magnetic medium for storing data? (Choose two.)
tape drive
solid state drive
hard disk drive
compact disk drive
blue-ray disk drive

26
Essentials
Refer to the exhibit. Which type of adapter is shown?
network interface
sound
video
RAID

27
Which component controls the communications and interactions between the CPU and other components on the motherboard?
RAM
CMOS
chipset
BIOS

28
Which two pieces of information are needed before selecting a power supply?
the total wattage of all components
the voltage requirements of peripheral devices
the form factor of the case
the type of CPU
the installed operating system

29
This is a flash item. Please click below to answer this item.
Essentials

30
Which unit of measurement is used to indicate the hard drive speed?
pages per minute
gigabytes
revolutions per minute
clusters per minute

31
Essentials
Refer to the exhibit. Which type of video card expansion slot is depicted?
PCIe
ISA
PCI
AGP

32
What type of connector can be used to connect an eSATA interface to an external SATA drive?
7-pin connector
9-pin connector
15-pin connector
5-pin connector

33
Where can the input voltage selection be changed from 110 volts to 220 volts on a computer system?
on the motherboard
in the BIOS
on the back of the power supply
in the operating system control panel

34
This is a flash item. Please click below to answer this item.
Essentials

35
Essentials
Refer to the exhibit. Which type of cable is shown in the graphic?
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USB
parallel
FireWire
serial

36
Which two activities are normally controlled by the Northbridge part of the chipset? (Choose two.)
communication between the CPU and the sound card
communication between the CPU and the hard drive
access to the RAM
communication between the CPU and the I/O ports
access to the video card

37
A technician looks at a motherboard and sees a 24-pin connector. What component would connect to the motherboard through the use of this 24-pin connector?
power supply
SATA drive
video card
PATA optical drive
floppy drive



IT Essentials v5 ch1 essentials

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