Saturday, December 13, 2008

Phil's A+ Certification Study Guide

Answers are marked with a '*'.

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CORE

40. Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because:

*a. there are alot more i/o addresses than IRQs.
b. the bios sometimes has more of a problem controlling IRQs
c. i/o addresses cannot conflict
d. software tends to correct i/o conflicts
e. software tends to mess up IRQs

41. SCSI adapters usually don't need drivers, just the devices that interface with them.

a. true
*b. false

42. Most SCSI-2 devices will work fine with SCSI-1 adapters.

*a. true
b. false

43. Single-ended SCSI or "regular" SCSI has one wire for each signal that needs to be sent along the SCSI bus. Differential SCSI has two wires for each signal that is sent. Differential SCSI cable lengths can be up to 25 meters. How long can single-ended SCSI cables be?

a. up to 50 meters
b. up to 100 meters
*c. up to 6 meters
d. up to 14 meters
e. up to 3 meters

44. Your PC has both internal and external SCSI devices connected to one SCSI host adapter. Which devices should be terminated? Select all that apply.

*a. the last internal device on the chain
*b. the last external device on the chain
c. the host adapter
d. the host adapter and one external device
e. the PC

45. How many devices can connect to the typical SCSI adapter? Assume is has only one data connector.

*a. 7
b. 8
c. 20
d. 10
e. depends on whether both internal and external devices are used

46. How many devices can be used on a single SCSI bus? Keep in mind that the SCSI host adapter counts as a device.

a. 7
*b. 8
c. 20
d. 10
e. see number 54

47. What is the jumper setting on a SCSI device to configure it to use the fourth SCSI id? Remember, SCSI ids start with zero.

a. 010
b. 110
*c. 011
d. 101
e. 001

48. Which type of interface provides for the fastest data transfer?

a. IDE
*b. SCSI
c. parallel
d. serial
e. ISA

49. In addition to i/o port addresses, SCSI adapters also use a range of rom addresses for their onboard bios.

*a. true
b. false

50. SCSI-2 cables have how many pins?

a. 40
b. 25
*c. 50
d. 72
e. 100