CompTIA A+ Flashcards


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Mobile Devices
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1

What is the maximum transmission speed of an ExpressCard in PCIe2 mode?

  1. 280 Mbps
  2. 512 Mbps
  3. 6 Gbps
  4. 2 Gbps

D. The maximum transmission speeds are as follows:

280 Mbps effective (USB 2 mode)

1.6 Gbps effective (PCIe 1 mode)

3.2 Gbps effective (PCIe 2 or USB 3 mode)

2

Which interface is natively found only in Apple devices?

  1. USB
  2. Serial
  3. Thunderbolt
  4. PS/2

C. Thunderbolt ports are most likely to be found on Apple laptops, although they are now showing up on others as well. USB ports are typically found on all mobile devices, while Serial and PS/2 connecters are rarely found on mobile devices.

3

What special screwdriver is typically required to work on a notebook?

  1. Phillips head
  2. T-8 Torx
  3. Hex
  4. Metric

B. Some models of notebook PCs require a special T-8 Torx screwdriver. Most PC toolkits come with a T-8 bit for a screwdriver with interchangeable bits, but you may find that the T-8 screws are countersunk in deep holes so that you can’t fit the screwdriver into them. In such cases, you need to buy a separate T-8 screwdriver, available at most hardware stores or auto parts stores. Phillips-head screwdrivers have a cross pattern on the tip and may be required. Hex heads are another type you may encounter, and metric drivers are those that are sized with the metric system.

4

What is the easiest thing to damage when removing a laptop keyboard?

  1. The keys
  2. The data cable
  3. The plastic cover
  4. The plastic screws

B. When replacing the keyboard, one of the main things you want to keep in mind is to not damage the data cable connector to the system board.

5

Which component if damaged can render the hard drive useless?

  1. The caddy
  2. The rails
  3. The signal pins
  4. The chassis

C. If required, remove the connector attached to the old drive’s signal pins and attach it to the new drive. Make sure it’s right side up and do not force it. Damaging the signal pins may render the drive useless. The caddy, rails, and chassis are not easily damaged.

6

What size hard drive goes in a laptop?

  1. 1.5 inch
  2. 2.0 inch
  3. 2.5 inch
  4. 3.5 inch

C. The 2.5-inch hard drives are smaller (which makes them attractive for a laptop where space is at a minimum); however, in comparison to 3.5-inch hard drives, they have less capacity and cache, and they operate at a lower speed.

7

Which is not an advantage of solid-state drives?

  1. Cheaper
  2. Not as susceptible to damage
  3. Faster
  4. No moving parts

A. The advantage of solid-state drives is that they are not as susceptible to damage if the device is dropped, and they are, generally speaking, faster as no moving parts are involved. They are, however, more expensive, and when they fail they don’t generally give some advance symptoms like a magnetic drive will do.

8

Which display uses a row of transistors across the top of the screen and a column of them down the side?

  1. Passive matrix
  2. Active matrix
  3. Twisted nematic
  4. In -plane switching

A. A passive matrix screen uses a row of transistors across the top of the screen and a column of them down the side. It sends pulses to each pixel at the intersection of each row and column combination, telling it what to display. An active matrix screen uses a separate transistor for each individual pixel in the display, resulting in higher refresh rates and brighter display quality. Twisted nematic (TN) is the older of the two major technologies for flat-panel displays. While it provides the shortest response time, has high brightness, and draws less power than competing technologies, it suffers from poor quality when viewed from wide angles. In-Plane Switching (IPS) is a newer technology that solves the issue of poor quality at angles other than straight on.

9

Which display is a newer technology that solves the issue of poor quality at angles other than straight on?

  1. Passive matrix
  2. Active matrix
  3. Twisted nematic
  4. In-plane switching

D. In-Plane Switching (IPS) is a newer technology that solves the issue of poor quality at angles other than straight on. A passive matrix screen uses a row of transistors across the top of the screen and a column of them down the side. It sends pulses to each pixel at the intersection of each row and column combination, telling it what to display. An active matrix screen uses a separate transistor for each individual pixel in the display, resulting in higher refresh rates and brighter display quality. Twisted nematic (TN) is the older of the two major technologies for flat-panel displays. While it provides the shortest response time, has high brightness, and draws less power than competing technologies, it suffers from poor quality when viewed from wide angles.

10

Which of the following lets you quickly connect/disconnect with external peripherals and may also provide extra ports that the notebook PC doesn’t normally have?

  1. Docking station
  2. Laptop lock
  3. Table lock
  4. Hot dock

D. With a hot dock, a laptop once put into suspended mode will recognize plug-and-play devices. A docking station essentially allows a laptop computer to be converted to a desktop computer. Laptop and table locks are used to secure mobile devices.

11

In what mode of plug and play must the laptop be turned off and back on for the change to be recognized?

  1. Hot docking
  2. Warm docking
  3. Cold docking
  4. Open docking

C. In cold docking, the laptop must be turned off and back on for the change to be recognized. In warm docking, the laptop must be put in and out of suspended mode for the change to be recognized. In hot docking, the change can be made and is recognized while running normal operations.

12

Which of the following is a class of devices that specializes in tracking your movement?

  1. Fitness monitor
  2. Extended reality
  3. Smartphones
  4. Tablets

A. While many smart watches can also act as fitness monitors, there is a class of devices that specializes in tracking your movement. Fitness monitors read your body temperature, heart rate, and blood pressure. Extended reality is an exciting new field that includes both augmented reality and virtual reality. Today’s smartphones are really computers that can make calls, and tablets have been in existence in some form or fashion since the early 1990s. Early on they were proprietary devices that didn’t have a lot in common with desktop computers, but increasingly the two form factors have gravitated toward one another.

13

Which of the following uses satellite information to plot the global location of an object and uses that information to plot the route to a second location?

  1. GPS
  2. Geofencing
  3. Remote wipe
  4. Local wipe

A. A global positioning system (GPS) uses satellite information to plot the global location of an object and uses that information to plot the route to a second location. Geofencing is the use of GPS to restrict communication to an area. Remote wipe is the cleaning of data from a lost or stolen device. There is no such thing as local wipe.

14

Which interface is the most common port found on mobile devices?

  1. USB
  2. Serial
  3. Thunderbolt
  4. PS/2

A. The two most common ports found on mobile devices are micro-USB and mini-USB. Both are small–form-factor implementations of the USB standard, the latest of which is USB 3.1. Thunderbolt ports are most likely to be found on Apple laptops, but they are now showing up on others as well. Serial and PS/2 connecters are rarely found on mobile devices.

15

Which is the most common pin code when selecting discovered Bluetooth devices?

  1. 0000
  2. 5555
  3. 1111
  4. 0135

A. Many external devices will ask for a PIN when you select the external device from the list of discovered devices. In many cases, the PIN is 0000, but you should check the manual of the external device.

16

Which of the following is the connection between the mobile device and the radio?

  1. PRI
  2. PRL
  3. IEMI
  4. IMSI

A. The product release information (PRI) is the connection between the mobile device and the radio. From time to time this may need updating, which, when done, may add features or increase data speed. The preferred roaming list (PRL) is a list of radio frequencies residing in the memory of some kinds of digital phones. International Mobile Equipment Identification (IMEI) is used to identify a physical phone device, while International Mobile Subscriber Identification (IMSI) is used to identify a Subscriber Identification Module (SIM) card.

17

Which of the following is a process whereby not only does the server verify the credential of the client but the client also verifies the credential of the server?

  1. Mutual authentication
  2. SSO
  3. Multifactor authentication
  4. Biometrics

A. Mutual authentication is a process whereby not only does the server verify the credential of the client but the client also verifies the credential of the server. It adds additional security to the process. Single sign-on is a service that allows users to sign in once and have access to all resources. Multifactor authentication makes use of multiple factors of authentication to increase security. Biometrics is the use of physical factors of authentication.

18

Which of the following is the use of physical factors of authentication?

  1. Mutual authentication
  2. SSO
  3. Multifactor authentication
  4. Biometrics

D. Mutual authentication is a process whereby not only does the server verify the credential of the client but the client also verifies the credential of the server. It adds additional security to the process. Single sign-on is a service that allows users to sign in once and have access to all resources. Multifactor authentication makes use of multiple factors of authentication to increase security. Biometrics is the use of physical factors of authentication