IT-Essentials

IT Essentials (Version 7.0) Chapter 1 Exam Answers

1. Which type of input device can identify users based on their voice?

  • You Answered
  • digitizer
  • KVM switch
  • scanner
  • biometric identification device*
ExplanationA biometric identification device is an input device that can identify a user based on a unique physical feature such as a fingerprint or voice. A digitizer is used with a stylus pen to design and create images or blueprints. A scanner is used to digitize an image or document. A KVM switch can connect multiple computers to one keyboard, monitor, and mouse.

2. Refer to the exhibit. What type of connecter is displayed?

  • DVI to HDMI adapter
  • Molex to SATA adapter
  • USB to PS/2 adapter
  • HDMI to VGA converter*
ExplanationThe displayed item is a HDMI to VGA converter that is used to convert digital signals to analog signals.

3. How are the internal components of a computer protected against ESD?

  • by grounding the internal components via attachment to the case*
  • by using multiple fans to move warm air through the case
  • by unplugging the computer after use
  • by using computer cases made out of plastic or aluminum
ExplanationElectrostatic discharge (ESD) can occur when there is a buildup of an electric charge (static electricity) on a surface which comes into contact with another. This can be mitigated by grounding the internal components of the computer to the case.

4. Which three devices are considered output devices? (Choose three.)

  • fingerprint scanner
  • headphones*
  • printer*
  • monitor*
  • mouse
  • keyboard
ExplanationHeadphones, monitors, printers, speakers,scanners, fax machines, and projectors are all considered output devices. Fingerprint scanners, keyboards, and mice are all considered input devices.

5. Refer to the exhibit. How is the connector used in a PC?

  • to connect disk drives
  • to connect legacy floppy drives
  • to supply power to various internal components*
  • to connect optical drives
ExplanationThis connector is called a 6/8-pin PCIe power connector and is used to supply power to various components of the computer.

6. A customer comes into a computer parts and service store. The customer is looking for a device to help a person with accessibility issues input instructions into a laptop by using a pen. What device should the store owner recommend to accomplish the required task?

  • stylus
  • biometric scanner
  • keyboard
  • NFC device

7. A customer comes into a computer parts and service store. The customer is looking for a device to provide secure access to the central server room using a retinal scan. What device should the store owner recommend to accomplish the required task?

  • biometric scanner
  • keyboard
  • NFC device
  • flatbed scanner

8. A customer comes into a computer parts and service store. The customer is looking for a device to help when repairing an airplane and that will allow the customer to see and interact with the repair manual at the same time. What device should the store owner recommend to accomplish the required task?

  • AR headset
  • biometric scanner
  • keyboard
  • NFC device

9. A customer comes into a computer parts and service store. The customer is looking for a device to manually input text for a new networking textbook that the customer is writing. What device should the store owner recommend to accomplish the required task?

  • keyboard
  • biometric scanner
  • NFC device
  • flatbed scanner

10. A customer comes into a computer parts and service store. The customer is looking for a device to allow secure access to the main doors of the company by swiping an ID card. What device should the store owner recommend to accomplish the required task?

  • magstripe reader
  • biometric scanner
  • keyboard
  • NFC device

11. A customer comes into a computer parts and service store. The customer is looking for a device to allow users to tap and pay for their purchases. What device should the store owner recommend to accomplish the required task?

  • NFC device
  • joystick or gamepad
  • projector
  • magstripe reader

12. A customer comes into a computer parts and service store. The customer is looking for a device to allow secure access to the main doors of the company by swiping an ID card. What device should the store owner recommend to accomplish the required task?

  • magstripe reader
  • joystick or gamepad
  • projector
  • AR headset

13. A customer comes into a computer parts and service store. The customer is looking for a device to display a promotional presentation to a large audience at a conference. What device should the store owner recommend to accomplish the required task?

  • projector
  • joystick or gamepad
  • magstripe reader
  • AR headset

14. A customer comes into a computer parts and service store. The customer is looking for a device to scan some old family photos into a laptop. What device should the store owner recommend to accomplish the required task?

  • flatbed scanner
  • joystick or gamepad
  • projector
  • magstripe reader

15. A customer comes into a computer parts and service store. The customer is looking for a device to train pilots how to land and take off in a computer simulation environment. What device should the store owner recommend to accomplish the required task?

  • joystick or gamepad
  • projector
  • magstripe reader
  • AR headset

16. Which characteristic describes DDR3 SDRAM?

  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins
  • an individual memory chip that has dual rows of pins used to attach it to the motherboard
  • a small circuit board that holds several memory chips and has a 30- or 72-pin configuration
  • chips specifically designed for video graphics that are used in conjunction with a dedicated GPU

17. Which characteristic describes ECC memory?

  • chips that can detect multiple bit errors and correct single bit errors in memory
  • chips specifically designed for video graphics that are used in conjunction with a dedicated GPU
  • an individual memory chip that has dual rows of pins used to attach it to the motherboard
  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins

18. Which characteristic describes GDDR SDRAM?

  • chips specifically designed for video graphics that are used in conjunction with a dedicated GPU
  • chips that require constant power to function and are often used for cache memory
  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins
  • chips whose contents can be “flashed” for deletion and are often used to store BIOS

19. Which characteristic describes ROM?

  • a chip that cannot be erased or rewritten and is now obsolete
  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins
  • chips specifically designed for video graphics that are used in conjunction with a dedicated GPU
  • chips that require constant power to function and are often used for cache memory

20. Which characteristic describes a DIP?

  • an individual memory chip that has dual rows of pins used to attach it to the motherboard
  • chips that require constant power to function and are often used for cache memory
  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins
  • chips whose contents can be “flashed” for deletion and are often used to store BIOS

21. Which characteristic describes PROM?

  • chips that are manufactured blank and then can be programmed once by a PROM programmer
  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins
  • chips specifically designed for video graphics that are used in conjunction with a dedicated GPU
  • chips that require constant power to function and are often used for cache memory

22. Which characteristic describes a SIMM?

  • a small circuit board that holds several memory chips and has a 30- or 72-pin configuration
  • chips that require constant power to function and are often used for cache memory
  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins
  • chips whose contents can be “flashed” for deletion and are often used to store BIOS

23. Which characteristic describes EPROM?

  • a chip that is nonvolatile and can be erased by exposing it to strong ultraviolet light
  • chips that run at clock speeds of 800 MHz and have a connector with 240 pins
  • chips specifically designed for video graphics that are used in conjunction with a dedicated GPU
  • chips that require constant power to function and are often used for cache memory

24. Which characteristic describes a SIMM?

  • a small circuit board that holds several memory chips and has a 30- or 72-pin configuration
  • SRAM that is internal and integrated into the CPU
  • a smaller, more condensed memory module that provides random access data storage, ideal for use in laptops, printers, and other devices where conserving space is desirable
  • an individual memory chip that has dual rows of pins used to attach it to the motherboard

25. Which characteristic describes EPROM?

  • a chip that is nonvolatile and can be erased by exposing it to strong ultraviolet light
  • SRAM that is internal and integrated into the CPU
  • a smaller, more condensed memory module that provides random access data storage, ideal for use in laptops, printers, and other devices where conserving space is desirable
  • a small circuit board that holds several memory chips and has a 30- or 72-pin configuration

26. 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
  • video card
  • PATA optical drive
  • SATA drive
  • floppy drive

27. Which two activities are normally controlled by the Northbridge part of the chipset? (Choose two.)

  • communication between the CPU and the I/O ports
  • access to the RAM
  • communication between the CPU and the hard drive
  • access to the video card
  • communication between the CPU and the sound card
Explanation The Northbridge chipset generally controls access to the RAM, video card, and the speeds at which the CPU can communicate with them.

28. Which two components usually interface directly with the Southbridge chipset on the motherboard? (Choose two.)

  • video card
  • USB ports
  • RAM
  • hard drive
  • PCIe slots
Explanation The Southbridge chipset allows the CPU to communicate with the hard drive and USB ports (and other I/O ports). CPU access to RAM, video card, and PCIe slots is provided by the Northbridge chipset.

29. Which statement describes the proper use of an anti-static wrist strap?

  • An anti-static wrist strap should not be used in conjunction with an antistatic mat.
  • For optimum grounding, the clip should be attached to a painted section of the computer case.
  • An anti-static wrist strap should make contact with the skin.
  • The anti-static wrist strip should not be attached to any grounded object.
Explanation ESD can cause permanent damage to electrical components. An anti-static wrist strap must be worn and grounded when working on a PC. Computer case paints may not be conductive and thus it is better to ground the bare section of a computer case.

30. A technician is building a thick client workstation that would be used to run a database and wants to ensure the best protection against errors. What type of memory would be best suited for this?

  • ECC
  • RDRAM
  • DDR3
  • DDR2
Explanation RDRAM, DDR2, and DDR3 RAM do not offer any error correction abilities for data within the memory module. ECC RAM allows for the detection of multiple bit errors and correction of single bit errors within the memory modules.

31. Which type of memory is primarily used as cache memory?

  • DRAM
  • RAM
  • ROM
  • SRAM

32. Which adapter would a technician install in a desktop computer to enable a video signal to be recorded from a video recorder to the computer hard drive?

  • video adapter
  • TV tuner card
  • video capture card
  • network interface card
Explanation A video capture card enables video to be saved as a file on the computer hard drive from a video recorder. A TV tuner card enables television signals to be received and viewed by the computer. A video adapter enables the computer to display computer output on a screen. A network interface card enables the computer to connect to a data network.

33. Which two storage devices use a magnetic medium for storing data? (Choose two.)

  • tape drive
  • solid state drive
  • hard disk drive
  • blue-ray disk drive
  • compact disk drive
Explanation A hard drive, or hard disk drive, is a magnetic storage device that is installed inside the computer. The hard drive is used as permanent storage for data.

A tape drive is a magnetic storage that is most often used for backup or archive data. Magnetic tapes are used to store data via a magnetic read/write head.

34. Which unit of measurement is used to indicate the hard drive speed?

  • revolutions per minute
  • gigabytes
  • pages per minute
  • clusters per minute
Explanation Revolutions per minute (RPM) is the speed at which the spindle in a hard drive spins. The faster the spindle spins, the faster the data can be retrieved from the platters.

35. What three voltages are commonly provided by the power supply to the various components inside the computer? (Choose three.)

  • 3.3 volts
  • 5 volts
  • 9 volts
  • 12 volts
  • 24 volts
  • 48 volts
Explanation Computer power supplies typically deliver three voltages to various components inside the computer. These are 3.3 volts for CPUs, 5 volts for motherboard components, and 12 volts for disk drive motors.

36. A customer needs additional storage space on an older computer. What will the technician look at in the computer to determine if an additional hard drive can be added?

  • adequate RAM
  • an open PCI/PCIe expansion slot
  • an available PATA/SATA connection
  • BIOS version
  • the heat that is generated and air flow requirements
Explanation PATA supports two devices per cable. PATA cables sometimes have only one device connector. A new PATA cable could be purchased that had two device connectors. Each SATA device, on the other hand, requires a SATA port and a SATA cable.

37. Which component controls the communications and interactions between the CPU and other components on the motherboard?

  • RAM
  • BIOS
  • CMOS
  • chipset
Explanation The chipset controls communication between the CPU and other computer components.

38. Which statement describes a characteristic of GDDR Synchronous Dynamic RAM?

  • It is used in conjunction with a dedicated GPU.
  • It processes massive amounts of data at the fastest speeds.
  • It is used for main memory.
  • It has a low power consumption and is used for cache memory.
Explanation GDDR Synchronous Dynamic RAM is specially designed for graphics and is used in conjunction with a GPU.

39. Hard drives in a grocery warehouse keep failing because of vibrations in the warehouse environment. What would be a possible solution for this high failure rate?

  • Install an SSD drive in each computer.
  • Install a more powerful power supply in each computer.
  • Install an antistatic mat under each computer.
  • Install each computer in a specialized high airflow case.
Explanation SSD drives are an outstanding choice in extreme temperatures, in unusual environments, and in an environment where there are vibrations.

40. Refer to the exhibit. Which two port types are shown in the graphic? (Choose two.)

  • modem
  • network
  • parallel
  • serial
  • USB
Explanation The port on the left is the USB port. The port on the right is the network port.

41. From which type of data storage does the CPU load information for processing during normal operation?

  • SSD
  • RAM
  • ROM
  • hard drive
Explanation RAM is the temporary storage to which data and programs are loaded by the CPU for processing. ROM is read-only memory. Its content will not be altered by the CPU during normal operation. Both the hard drive and an SSD are data storage devices. The CPU will send data to them for storage or retrieve data from them and load into RAM for processing.

42. Refer to the exhibit. Which type of adapter is shown?

  • sound
  • RAID
  • video
  • network interface
Explanation The card that is shown in the exhibit is a network interface adapter with an RJ-45 port which is used to connect the computer to a network via a network cable.

43. Which type of device would be used on a laptop to verify the identity of a user?

  • a MIDI device
  • a biometric identification device
  • a touch screen
  • a digitizer
Explanation As biometric identification devices, laptops commonly use a fingerprint scanner or, for facial recognition, a camera.

44. Which two devices are considered input devices? (Choose two.)

  • biometric authentication device
  • printer
  • digital camera
  • projector
  • speakers
Explanation Biometric authentication devices and digital cameras are considered input devices. Speakers, projectors, and printers are all considered as output devices.

45. What is an active cooling solution for a PC?

  • Reduce the speed of the CPU.
  • Add a heatsink to the CPU.
  • Add an additional case fan.
  • Use a painted computer case.
Explanation Active cooling solutions require power (like adding a case fan) while passive cooling solutions do not.

46. Which tool can protect computer components from the effects of ESD?

  • antistatic wrist strap
  • surge suppressor
  • UPS
  • SPS
Explanation An antistatic wrist strap equalizes the electrical charge between the technician and the equipment and protects the equipment from electrostatic discharge.

47. 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.

48. Which statement describes a characteristic of SRAM in a PC?

  • It is used as main RAM in a PC.
  • It has the highest power consumption.
  • It is used for cache memory.
  • It has a connector with 240 pins.
Explanation SRAM is used for cache memory. It takes a small, but constant source of power to function.

49. A customer has a computer for a home business, but wants to have another computer as a web server. What would be the best solution for the customer to share the monitor, mouse, and keyboard between the two computers?

  • access point
  • KVM switch
  • multipurpose device
  • network switch
  • USB hub
Explanation: A KVM switch allows sharing the keyboard, video and mouse between computer systems.

50. Why is it important to ground both computers and network devices?

  • to ensure that both the power supplied and the power used is in sync with the ground voltage
  • to ensure that the power supply is limited to an output of 110V DC
  • to provide a path of least resistance for stray current
  • to facilitate the flow of current from the power supply to the computer case
Explanation: In the event of stray current being generated by a fault within the computer, the ground will provide a path of least resistance for the current to flow harmlessly away.

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