IT Essentials v7.01 Chapter 7 Quiz Answers

1. Which type of laptop display has components that may contain mercury and use either a CCFL or LED backlight?

  • plasma
  • OLED
  • LCD
  • LED

Explanation: Liquid crystal displays (LCDs) use more power than light-emitting diode (LED) or organic LED (OLED) displays. Both LCDs and LEDs use backlights, but LCD screens could use either a cold cathode fluorescent lamp (CCFL) or LED backlight.

2. A technician is trying to determine the cause of a laptop problem. Which of the listed activities is an example of the technician testing a theory?

  • The technician uses an AC adapter to power the laptop.
  • The technician asks the user the time the user first noticed the problem.
  • The technician determines that the keyboard does not work.
  • The technician suspects a loose cable.

Explanation: The first three steps of the troubleshooting process are to identify the problem, establish a theory of probable cause, and test the theory to determine the cause. During the third step, the technician is taking action on what is believed to be what is causing the problem such as using an AC adapter with a laptop. When a technician is questioning the user, the technician is trying to identify the problem. If the technician suspects that the battery does not have a charge, will not keep a charge, or that there might be loose cable connections, the technician is thinking through common laptop problems.

3. Which wireless technology can be used to connect wireless headphones to a computer?

  • 4G-LTE
  • Bluetooth
  • Wi-Fi
  • NFC

Explanation: Bluetooth is a low-power, short range wireless technology that provides connectivity for accessories such as speakers, headphones, and microphones.

4. A traveling sales representative uses a cell phone to interact with the home office and customers, track samples, make sales calls, log mileage, and upload/download data while at a hotel. Which internet connectivity method would be a preferred method to use on the mobile device due to the low cost?

  • cellular
  • cable
  • Z-Wave
  • DSL
  • Wi-Fi

Explanation: Mobile devices typically use either the cellular network or a Wi-Fi network to connect to the internet. The Wi-Fi connection is preferred because it uses less battery power and is free in many places.

5. What is used to provide location information to smart devices?

  • Zigbee coordinator
  • GPS
  • e-reader
  • smart hub

Explanation: The Global Positioning System (GPS) is a satellite-based navigation system that transmits signals back to GPS receivers on Earth.

6. Which laptop component makes use of throttling to reduce power consumption and heat?

  • hard drive
  • motherboard
  • optical drive
  • CPU

Explanation: To reduce heat and power consumption, CPU throttling can be used. CPU throttling reduces the CPU speed.

7. Which laptop part is removed by pressing outwards on clips that hold it into place?

  • card reader
  • SODIMM
  • power supply
  • wireless antenna

Explanation: When removing a SODIMM, make sure to remove the AC adapter and battery first. Then press outward on the clips to release it from the memory slot.

8. Why are SODIMMs well suited for laptops?

  • They have a small form factor.
  • They are interchangeable with desktops.
  • They do not produce heat.
  • They connect to external ports.

Explanation: Small Outline Dual In-line Memory Modules, or SODIMMs, are designed for the space restrictions of laptops.

9. Which type of media would be used with a card reader attached to a laptop?

  • Blu-ray
  • DVD
  • SD
  • CD-R

Explanation: A card reader commonly attaches to a USB port or is integrated into a laptop. It is used to read from or write to flash media of various sizes including SD.

10. What two sources of information are used to enable geocaching, geotagging and device tracking on Android and iOS devices? (Choose two.)

  • the user profile
  • GPS signals
  • images of the environment from the integrated camera
  • the relative position to other mobile devices
  • cellular or Wi-Fi network

Explanation: Mobile devices are frequently fitted with a GPS radio receiver, enabling them to calculate their position. Some devices do not have a GPS receiver. Instead, they use information from Wi-Fi and cellular networks.

11. Which statement is true of laptop motherboards?

  • They are interchangeable with most desktop motherboards.
  • The form factor varies by manufacturer.
  • They follow standard form factors so they can be interchanged easily.
  • Most of them use the ATX form factor.

Explanation: Laptop computers use proprietary form factors and therefore they are different from one manufacturer to another.

12. Which protocol enables mail to be downloaded from an email server to a client and then deletes the email from the server?

  • HTTP
  • IMAP
  • POP3
  • SMTP

Explanation:

  • With POP, mail is downloaded from the server to the client and then deleted on the server.
  • SMTP is used for sending or forwarding email.
  • Unlike POP, when a user connects via IMAP, copies of the messages are downloaded to the client application and the original messages are kept on the server until manually deleted.
  • HTTP is used for web traffic data and is considered insecure.

13. At a conference, a presenter cannot get the laptop to display through the projector and a technician is called. What should the technician try first?

  • Replace the projector or provide an alternate one.
  • Use the appropriate Fn key to output to the external display.
  • Attach an AC adapter to the laptop.
  • Reboot the laptop.

Explanation: The default display for any laptop is the laptop display. To output to an external video port such as when a laptop is connected to an external monitor or projector, use the appropriate Fn key to change the output to just the external video port or to display both on the laptop display and through the projector.

14. Which ACPI power state provides power to the CPU and RAM, but powers down unused devices?

  • S3
  • S4
  • S1
  • S0
  • S2

Explanation: The Advanced Configuration and Power Interface (ACPI) standard provides support for power states that are very important to mobile devices such as laptops.

  • S0 – The computer is on and CPU running.
  • S1 – CPU and RAM have power, but unused devices are powered down.
  • S2 – CPU is off; RAM is refreshed.
  • S3 – CPU is off; RAM is set to a slow refresh rate.
  • S4 – CPU and RAM are off (and RAM contents saved to a temp file).
  • S5 – The computer is off.

15. What is a CRU as it relates to a laptop?

  • a part a user can replace
  • a network connector
  • a type of storage device
  • a type of processor

Explanation: Customer-replaceable units (CRUs) are parts that can be installed by someone that does not have advanced technical skills. Examples of CRUs include a laptop battery and memory.


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