IT-Essentials

IT Essentials (Version 7.0) Chapter 3 Exam Answers

1. Which definition describes the term “overclocking”?

  • changing the bus speed of the motherboard to increase the speed of attached adaptors
  • increasing the speed of the CPU beyond the recommendations of the manufacturer*
  • modifying the motherboard clocking crystal to increase the timing signals
  • replacing slower SDRAM with faster memory
Explanation:Increasing the CPU clock speed will make the computer run faster, but also generate more heat and cause overheating issues.

2. Which hardware upgrade would allow the processor in a gaming PC to provide the optimal gaming performance?

  • a high capacity external hard drive
  • a fast EIDE drive
  • large amounts of fast RAM*
  • liquid cooling
Explanation:Faster RAM will help the processor to keep all of the data in sync because the data that it needs to calculate can be retrieved when it is needed. The more RAM that the computer has, the less often the computer needs to read from slower storage such as hard drives or SSDs.

3. Which term refers to the technique of increasing the speed of a processor from the specified value of its manufacturer?

  • overclocking*
  • hyperthreading
  • multitasking
  • throttling
Explanation:Overclocking is a technique that is used to make a processor work at a faster speed than its original specification. Overclocking is not a reliable way to improve computer performance and can result in damage to the CPU.

4. What indicates that the charge on the CMOS battery could be getting low?

  • A beep error code occurs during POST.
  • Performance while accessing files on the hard drive is slow.
  • The computer time and date are incorrect.*
  • The computer fails to boot.
Explanation:The computer time and date are held in CMOS. This requires power from a small battery. If the battery is getting low, the system time and date may become incorrect.

5. A technician accidentally spills a cleaning solution on the floor of the workshop. Where would the technician find instructions on how to properly clean up and dispose of the product?

  • the regulations provided by the local occupational health and safety administration
  • the safety data sheet*
  • the insurance policy of the company
  • the local hazardous materials team
Explanation:The Safety Data Sheet (SSD) summarizes information about materials, including hazardous ingredients, fire hazards, and first-aid requirements.

6. Match the RAID technology terms to the description. (Not all options are used.)

7. Which two considerations would be of the greatest importance when building a workstation that will run multiple virtual machines? (Choose two.)

  • amount of RAM
  • number of CPU cores
  • water cooling
  • powerful video card
  • high-end sound card
Explanation:Virtual computing requires more powerful hardware configurations because each installation needs its own resources and thus requires a lot of RAM and CPU processing power.

8. Which two components are commonly replaced when a computer system with a newer motherboard is being upgraded? (Choose two.)

  • RAM
  • hard disk drive
  • CPU
  • optical drive
  • CMOS battery
  • adapter card
Explanation:When a motherboard is being upgraded to a newer version, both the CPU and RAM are commonly upgraded to support the motherboard compatibility requirements.

9. What are two reasons for installing a second hard disk drive inside an existing computer? (Choose two.)

  • to support a RAID array
  • to store BIOS configuration settings
  • to store the system swap file
  • to increase CPU speed
  • to allow access to a secondary display output
Explanation:The common reasons to install a second hard disk drive in a computer include: 1) increase storage space, 2) increase hard drive speed, 3) install a second operating system, 4) store the system swap file, 5) provide fault tolerance, and 6) backup the original hard drive.

10. A technician has just finished assembling a new computer. When the computer is powered up for the first time, the POST discovers a problem. How does the POST indicate the error?

  • It issues a number of short beeps.
  • The LED on the front of the computer case flashes a number of times.
  • It places an error message in the BIOS.
  • It locks the keyboard.

11. What is a function of the BIOS?

  • enables a computer to connect to a network
  • provides temporary data storage for the CPU
  • performs a check on all internal components
  • provides graphic capabilities for games and applications

12. A technician has assembled a new computer and must now configure the BIOS. At which point must a key be pressed to start the BIOS setup program?

  • before the computer is powered on
  • during the Windows load process
  • during the POST
  • after the POST, but before Windows starts to load
Explanation:To enter the BIOS setup program, you must press the proper key or key sequence during POST. Many motherboards will display graphics while the computer is checking hardware and waiting for the proper key press for the user to enter the BIOS.

13. How does an inline UPS protect computer equipment against electrical power brownouts and blackouts?

  • by grounding excess electrical voltage
  • by using a battery to supply a constant level of voltage
  • by switching from main power to a standby power source
  • by stopping the flow of voltage to the computer
Explanation:Uninterruptible power supplies (UPS) contain a battery which is constantly providing a consistent level of voltage to the computer.

14. Which condition refers to a reduced voltage level of AC power that lasts for an extended period of time?

  • brownout
  • sag
  • spike
  • surge
Explanation:Surges and spikes are increased voltage levels. A sag is a short duration reduction in line voltage while a brownout is a reduction in voltage that occurs for an extended period of time.

15. How should a technician dispose of an empty inkjet printer cartridge?

  • Refill it.
  • Throw it away.
  • Follow local regulations for disposal.
  • Give it back to the customer.
Explanation:Refilling used inkjet cartridges is not recommended, as it may void the printer warranty and could leak ink, damaging the printer. Printer cartridges should be recycled, following the procedures established for recycling by the manufacturer. Because they are an environmental hazard, they should never be thrown away.

16. What makes CRT monitor disposal dangerous for a technician who is handling the disposal?

  • potential breathing hazards
  • potential explosive materials
  • potential residual high voltage
  • potential health-damaging chemicals
Explanation:CRT monitors do contain lead, barium, and rare earth metals that can be dangerous to the environment if not disposed of properly, but the danger to the technician is in the high voltage levels that can be stored even after powering off the monitor and disconnecting the power cord. A technician might be disposing of a CRT monitor that has the cover ajar or removed and be exposed to the high voltage.

17. 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?

  • FireWire
  • DVI
  • HDMI
  • USB
  • VGA
Explanation:High definition multimedia interface, or HDMI, was originally a television standard. However, because it has many digital features, it is also a popular interface to connect audio and video devices to computers.

18. What is indicated by the contrast ratio of a monitor?

  • the difference in the intensity of light between the brightest white and darkest black that can be displayed
  • how often the picture image is refreshed
  • the total number of pixels that make up the picture
  • the ratio of the horizontal and vertical viewing areas of the monitor
Explanation:Contrast ratio is one of many factors that is used to describe the resolution of a monitor. Contrast ratio is a measure of the difference in intensity between white and black areas of the picture. A higher contrast ratio means the monitor can produce pictures with brighter whites and darker blacks.

19. What electrical unit refers to the number of electrons moving through a circuit per second?

  • current
  • voltage
  • resistance
  • power
Explanation:Current refers to the amount of electrons moving through a circuit per second and is measured in amperes or amps.

20. What characteristic of electricity is expressed in watts?

  • the amount of work required to move electrons through a circuit
  • the resistance to the flow of current in a circuit
  • the amount of electrons flowing through a circuit per second
  • the work required to move electrons through a circuit multiplied by the number of electrons flowing through a circuit per second
Explanation:Watts is the unit used to measure the electrical power. Power refers to the work required to move electrons through a circuit multiplied by the number of electrons flowing through a circuit per second.

21. Which is a BIOS security feature that can prevent data from being read from a hard drive even if the hard drive is moved to another computer?

  • drive encryption
  • RAID
  • secure boot
  • BIOS passwords
Explanation:There are several commonly available BIOS security features. Drive encryption is used to encrypt hard drives to prevent data access. Secure boot ensures that devices will only boot a trusted operating system. BIOS passwords allow different levels of BIOS access. RAID is not a BIOS security feature but rather provides redundancy and fault tolerance by using multiple hard drives.

22. What data is stored in the CMOS memory chip?

  • BIOS settings
  • Windows configuration settings
  • user login information
  • device driver
Explanation:The complementary metal-oxide semiconductor (CMOS) chip is a small memory chip located on the motherboard that is used to store saved BIOS settings.

23. What is the purpose of LoJack?

  • It allows the owner of a device to remotely locate, lock, or delete all files from the device.
  • It ensures that a computer will only boot an operating system that is trusted by the motherboard manufacturer.
  • It provides passwords for different levels of access to the BIOS.
  • It encrypts data on hard drives to prevent access without the correct password.
Explanation:The LoJack security feature protects against data theft if a device is stolen by allowing the owner to locate, lock, or delete all files on the device.

24. What is one purpose of adjusting the clock speed within the BIOS configuration settings?

  • to allow a computer to run multiple operating systems in files or partitions
  • to change the order of the bootable partitions
  • to disable devices that are not needed or used by the computer
  • to allow the computer to run slower and cooler
Explanation:The CPU clock speed can be adjusted up or down within the BIOS configuration settings. By lowering the clock speed, a CPU can run slower and cooler. Increasing the CPU clock speed makes the computer run faster and hotter.

25. 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 7200 RPM EIDE hard drive
  • a 7200 RPM SATA hard drive
  • a 10,000 RPM SATA hard drive
  • an SSD
Explanation:Games require a lot of storage. In order for the computer to load and run games quickly, a fast hard drive will need to be installed. To obtain best performance an SSD (Solid-State Drive) will perform faster than an EIDE drive or a SATA drive.

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

  • encryption
  • TPM
  • execute disable bit
  • LoJack
Explanation:The execute disable option can be turned on, if the feature is supported by the OS, to prevent malicious code from being executed inside a specific memory area that contains operating system files.

27. A user reports that every morning when a particular computer is turned on, the configuration settings on that computer have to be reset. What action should be taken to remedy this situation?

  • Replace the motherboard.
  • Replace the CMOS battery.
  • Move the jumpers.
  • Upgrade the BIOS.
Explanation:BIOS information is maintained through the use of a CMOS battery. If the CMOS battery no longer provides power, configuration settings may be lost.

28. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 6?

  • 3
  • 5
  • 6
  • 7

29. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 10?

  • 4
  • 5
  • 6
  • 7

30. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 10?

  • 4
  • 6
  • 10
  • 7

31. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 1?

  • 2
  • 6
  • 10
  • 7

32. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 5?

  • 3
  • 7
  • 6
  • 10

33. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 5?

  • 3
  • 1
  • 7
  • 10

34. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 10?

  • 4
  • 5
  • 1
  • 6

35. A data analyst has asked a technician to help protect locally stored data by installing a RAID. What is the minimum number of drives the technician has to install if configuring a RAID level 1?

  • 2
  • 6
  • 1
  • 5

36. A technician has been asked to configure several computers with RAID. The customer needs protection if one drive fails, fast access, and drive capacity. Which RAID should the technician install?

  • RAID 5
  • RAID 4
  • RAID 2
  • RAID 3

37. A technician has been asked to configure several computers with RAID. The customer needs protection if two drive fails and wants as much drive capacity as possible. Which RAID should the technician install?

  • RAID 6
  • RAID 7
  • RAID 2
  • RAID 3

38. A technician has been asked to configure several computers with RAID. The customer needs protection if two drive fails and wants as much drive capacity as possible. Which RAID should the technician install?

  • RAID 6
  • RAID 7
  • RAID 8
  • RAID 4

39. A technician has been asked to configure several computers with RAID. The customer needs protection for one drive failure and only has room in the computer for two drives. Which RAID should the technician install?

  • RAID 1
  • RAID 7
  • RAID 8
  • RAID 4

40. A technician has been asked to configure several computers with RAID. The customer wants RAID and full drive capacity, but does not care about a drive failure, because all data is constantly backed up. The computer where the RAID is to be installed only has room for two drives. Which RAID should the technician install?

  • RAID 0
  • RAID 8
  • RAID 7
  • RAID 4

41. A technician has been asked to configure several computers with RAID. The customer wants data to be stored on two drives that are used to maximum capacity and does not care if a single drive fails, because data is backed up hourly. Which RAID should the technician install?

  • RAID 0
  • RAID 8
  • RAID 7
  • RAID 4

42. A technician has been asked to configure several computers with RAID. The customer wants data to be stored on three drives and protection for one drive failure. Which RAID should the technician install?

  • RAID 5
  • RAID 2
  • RAID 8
  • RAID 7

43. A technician has been asked to configure several computers with RAID. The customer wants three drives to be used and protection if one drive fails. Which RAID should the technician install?

  • RAID 5
  • RAID 2
  • RAID 4
  • RAID 3

44. A technician has been asked to configure several computers with RAID. The customer wants to incorporate mirroring and striping as part of the RAID. Which RAID should the technician install?

  • RAID 10
  • RAID 3
  • RAID 4
  • RAID 2

45. A technician has been asked to configure several computers with RAID. The customer wants the best RAID possible with three drives used. Which RAID should the technician install?

  • RAID 6
  • RAID 3
  • RAID 4
  • RAID 2

46. A technician is selecting a PC that will be used by a user as a thin client. What is a major consideration that needs to be taken into account?

  • network connection to a server
  • multiple SCSI drives
  • optical drive
  • multiple touch screens

47. A technician is selecting a web server that will be used to host multiple gaming applications. What is a major consideration that needs to be taken into account?

  • powerful processor
  • multiple SCSI drives
  • optical drive
  • multiple touch screens

48. A technician is selecting a web server that will be used to host multiple gaming applications. What is a major consideration that needs to be taken into account?

  • powerful processor
  • read-only memory modules
  • multiple touch screens
  • multiple SCSI drives

49. A technician is selecting a PC that will be used by a songwriter to mix tracks. What is a major consideration that needs to be taken into account?

  • specialized audio card
  • dual-fan power supply
  • smart card reader
  • Thunderbolt connector

50. A technician is selecting a laptop that will be used by a teleworker for connecting to the internet while traveling anywhere. What is a major consideration that needs to be taken into account?

  • cellular card
  • Thunderbolt connector
  • smart card reader
  • dual-fan power supply

51. A technician is selecting a server that will be used by a cloud provider for data storage. What is a major consideration that needs to be taken into account?

  • multiple large hard drives
  • smart card reader
  • Thunderbolt connector
  • dual-fan power supply

52. A technician is selecting a server that will be used by a cloud provider to provide fault tolerance for large quantities of stored data. What is a major consideration that needs to be taken into account?

  • RAID
  • smart card reader
  • Thunderbolt connector
  • dual-fan power supply

53. A technician is selecting a PC that will be used by an employee who wants to share a keyboard and mouse among three devices. What is a major consideration that needs to be taken into account?

  • KVM switch
  • motherboard that supports dual-channeling
  • smart card reader
  • Thunderbolt connector

54. A technician is selecting a PC that will be used by an employee who wants to share a keyboard and mouse among three devices. What is a major consideration that needs to be taken into account?

  • KVM switch
  • UEFI BIOS
  • dual-fan power supply
  • read-only memory modules

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