IT Essentials v4.1 Chapter 1 (questions and answers)

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