1.0 Mobile Devices - A+ 1101 Flashcards
You are configuring the mail app on an iPhone to use an Outlook.com email address. What
configuration information do you need to enter to establish connectivity?
A. Email address and password
B. Email address, password, and server name
C. Email address, password, server name, and mail protocol
D. Email address, password, server name or IP address, and mail protocol
A. When configuring a mobile email client to access a commercial email provider, you typically just need your username and password to establish connectivity.
Examples include :
Google, Yahoo, Outlook.com, and iCloud.
Which type of smartphone display has fewer layers, providing more flexibility, a better
viewing angle, and excellent color as compared to other technologies?
A. IPS
B. OLED
C. LED
D. TN
B. Many newer smartphones are boasting OLED displays for their light weight, flexibility, color depth, and wider viewing angle.
IPS is a popular type of LCD (Liquid Crystal Display) that requires backlighting to display the image.
TN was the LCD technology developed first.
It uses less power and has a limited viewing angle, but it supports very fast refresh rates.
LEDs can be used as the backlight for LCD systems.
OLED displays don’t need a backlight because their carbon-based material can emit light and color.
You are purchasing a mobile device that allows you to use multi-finger gestures to interact
with the device. What type of touchscreen technology does this device most likely use?
A. Capacitive
B. Infrared
C. SAW
D. Resistive
A. Capacitive touchscreens are a little less accurate than resistive touchscreens but more responsive. They respond to changes in electrical current, and as such, the human fingertip
works great as the facilitator of input.
Resistive screens require a heavier touch and don’t support multi-touch input.
Infrared screens don’t work with multi-touch gestures, but like resistive screens, they can be used with gloves on. Surface Acoustic Wave (SAW) is another type of touchscreen, but it is not popular.
Your friend’s iPhone 13 will no longer charge. They have tried replacing the charging block
and cable with compatible ones and tested the wall outlet. What should be done next?
A. Purchase a new phone.
B. Purchase a new battery.
C. Take the phone to a repair shop.
D. Use a wireless charging pad.
C. While it’s possible that the phone could be charged with a charging pad, most often phones won’t charge because the battery is worn out and needs replacing. Also, according to the Apple Support website, a phone that won’t charge likely needs servicing.
Your friend should take their phone to a service center. They may be able to replace the battery or fix problems they find with the phone’s connector.
Your boss has asked you to maximize the RAM in their laptop computer. You check the specifications and discover that the maximum system RAM is 32 GB of DDR4 RAM. The laptop
currently has 16 GB onboard RAM and one empty slot. Which of the following RAM modules will you purchase?
A. One 16 GB SODIMM
B. One 32 GB SODIMM
C. One 16 GB DIMM
D. One 32 GB DIMM
- A. You will always check the device’s documentation before purchasing components to ensure compatibility. In a laptop, RAM is often soldered directly onto the motherboard (onboard) and isn’t meant to be replaced by most users. Since the maximum system RAM is 32 GB, you would need one 16 GB RAM module to bring it up to that total.
The SO in SODIMM stands for Small Outline and is the type of RAM module used in devices like laptops and sometimes printers. DIMMs (Dual Inline Memory Modules) are used in desktop
computers.
- You need to replace a failed SATA hard drive on a 10-year-old laptop. The user has asked
that the new drive be as fast as possible, regardless of disk space or cost. What type of drive
should you install?
A. SSD
B. Magnetic
C. Hybrid
D. NVMe
- A. A solid-state drive (SSD) uses the same memory technology found in other forms of flash memory.
They are much faster than traditional magnetic drives or hybrid drives but generally don’t have as much capacity for the same price.
An NVMe drive is newer technology and would have to be supported by the laptop. It also uses a different connector.
- You need to replace a failed hard drive in a user’s laptop, and it’s a model you are unfamiliar
with. You look at the bottom of the laptop and see no obvious entrance points. Which
component will you most likely need to remove to access the hard drive bay?
A. Plastics/frames
B. Battery
C. System board
D. Keyboard
- D. As a rule of thumb, either you can access components from the bottom of a laptop, such
as the memory and Mini PCIe card, or you’re going to need to remove the keyboard to access
the components from the top
- You are on the phone talking to a technician who is trying to upgrade a laptop. The technician is having trouble identifying the Mini PCIe card. How wide should you tell the technician that the card is?
A. 27 mm
B. 30 mm
C. 51 mm
D. 60 mm
- B. Mini PCIe cards come in two sizes. The full-size cards measure 30 mm wide and 51 mm
long. Half-size cards are 30 mm wide and 27 mm long.
- Which mobile connection type allows you to share your cellular Internet connection with a
Wi-Fi enabled device?
A. Hotspot
B. NFC
C. Bluetooth
D. IrDA
- A. If you have a cellular-enabled device such as a smartphone, you may be able to turn that
phone into a mobile hotspot.
By doing so, you can share your cellular Internet connection with Wi-Fi-enabled devices such as laptops and tablets. Near-Field Communication (NFC) devices can communicate and send data and files but only if they are within inches of each
other.
Bluetooth is a common wireless technology for connecting devices such as keyboards and headsets to a computer, and IrDA (infrared) communicates using light, but requires a
line-of-sight
- Your company is producing posters for an upcoming public relations campaign. The project
leader wants to embed information into an NFC Type 4 tag in the poster. How much
information can this tag hold?
A. 16 KB
B. 32 KB
C. 1.4 MB
D. 2.4 MB
- B. Near-field communication (NFC) is a wireless technology that uses radio frequency (RF) signals with limited range, about 4″ (10 cm). To read an NFC tag in a poster, you would move your phone close to the tag.
The phone would generate a small RF field that would
power the tag, and data could then be read from the tag. There are five types of tags that vary in speed from 106 kbps to 2424 kbps and in maximum capacities from 2 KB to 32 KB.
Type 4 holds the most data but is slower than Type 3.
- You’ve been asked by the company president what can be done with NFC in addition to
paying for coffee. What will you tell them? (Choose three.)
A. Securely share data with someone you’re having lunch with.
B. Beam data to someone 10 feet away.
C. Transfer files, photos, and videos.
D. Add information or URLs to business cards, making it easier for customers to learn
about your products or services.
- A, C, D. NFC can do so much more than pay for your coffee. In addition to the answers above, NFC tags can be set up to automate tasks instead of manually changing settings, such as silencing an alarm or logging into a PC. In some places they can allow your phone to be your bus pass. They’re considered secure for communication because of the short distance
between devices.
- You are investigating new laptops for your company. You want the laptop displays to have a
wide viewing angle. Which technology standard is best suited for your needs?
A. LED
B. SVA
C. IPS
D. TN
- C. There are three types of Liquid Crystal Display (LCD) technologies listed in the A+ exam objectives: Twisted Nematic (TN), In-Plane Switching (IPS), and Vertical Alignment (VA).
IPS LCDs provide better color representation as well as wider viewing angles, so that would be the best choice for this situation. Their drawbacks are somewhat slower response times and they tend to be a bit more expensive.
Considering the other two types of LCD technologies, TN displays were developed first. They use less power compared to IPS and VA; however, when you start viewing them at wider angles, the picture quality suffers greatly.
VA LCDs have slower response times than either IPS or TN, but they have the best contrast and image depth.
SVA, or Super Vertical Alignment, is a Samsung term, not a standard, but it claims to offer better viewing angles than VA displays. LED monitors use Light Emitting Diodes as the backlight for an LCD.
There are also microLED monitors and OLED monitors that create
colors using LEDs with no backlight required.
- Which type of LCD has the best contrast, meaning the darkest black and lightest white?
A. TN
B. IPS
C. VA
D. OLED
- C. OLED (Organic LED) monitors are not LCD (Liquid Crystal Display) monitors. Each of the other three has their advantages.
TN (Twisted Nematic) displays have the fastest refresh rates, IPS (In-Plane Switching) displays have the best viewing angle, and VA (Vertical Alignment) displays have the best color contrast.
- Of the laptop LCD technologies, which consumes the least amount of power?
A. LED
B. IPS
C. TN
D. VA
- C. There are three types of Liquid Crystal Display (LCD) technologies listed in the exam objectives: Twisted Nematic (TN), In-Plane Switching (IPS), and Vertical Alignment (VA).
Of those three display types, TN uses the least amount of power. TN displays also have very fast refresh rates. The issue with TN LCD screens is that when you start viewing them at wider angles, the picture quality suffers greatly.
IPS LCDs provide better color representation as well as wider-angle viewing, but they tend to be a bit more expensive and have somewhat slower response times.
VA LCDs have slower response times than either IPS or TN, but they have the best contrast and image depth.
LED (Light-Emitting Diode) refers to a type of backlighting for LCD monitors.
- What type of display uses organic materials that themselves light up so that no backlight is
needed, meaning true black and greater contrasts can be achieved?
A. QLED
B. Mini-LED
C. LED
D. OLED
- D. The Organic LED (OLED) displays have incredible color contrast ratio because they can turn individual pixels off. They also have an excellent viewing angle. The drawback is that they may not be as bright as an LED (Light Emitting Diode) display.
LED and mini-LED displays use LEDs for backlighting, but still need the LCD (Liquid Crystal Display) panel.
QLED is a marketing name, but QLED displays use a quantum dot layer providing more color depth than regular LED displays. Micro-LEDs use three microscopic LEDs (red, green, and blue) to make each pixel, and each pixel can be turned on or off like an OLED TV.
QLED, mini-LED, and micro-LED aren’t on the CompTIA A+ objectives yet.
- Which mobile device component can take input from a stylus or your finger, depending on
the sensor type, and convert it into an image on the laptop or other mobile device?
A. Digitizer
B. Touchpad
C. Point stick
D. Inverter
- A. A digitizer is a device that can be written or drawn on, and the content will be converted from analog input to digital images on the computer.
Digitizers take input from a user’s
finger or a writing utensil, such as a stylus. Digitizers may be built into laptop and mobile device displays, or they can be separate devices that connect to a computer via a USB or other cable.
Touchpads and pointing sticks convert your finger movement to mouse movement on the display. An inverter is used in CCFL displays to convert DC to AC.
- Which type of mobile device is known for using electrophoretic ink?
A. E-reader
B. Smart watch
C. Smart glasses
D. Tablet
- A. Most e-reader displays use a technology called electrophoretic ink, or E Ink, which is a
proprietary type of electronic paper. Although E Ink is available in color, many consider its
best applications to be in grayscales or pure black and white. Additionally, E Ink uses almost
no power to keep print on the page until the print is changed.
- Which display component is capable of discharging energy and causing severe injuries to
technicians?
A. Screen
B. Backlight
C. Inverter
D. LCD
- C. The job of the inverter is to store and convert energy from DC to AC. Inverters have the
potential to discharge that energy and can be dangerous to technicians, so be careful when
working with them. A backlight provides light that shines through the Liquid Crystal Display
(LCD) to create pictures on the screen.
- What types of networking will smart cameras often have built into them? (Choose two.)
A. Bluetooth
B. IrDA
C. RJ-45
D. Wi-Fi
- A, D. Smart cameras have built-in wireless network connectivity for easy picture and video
transfers. Many will include Wi-Fi, Bluetooth, and NFC (Near-field Communication). IrDA
uses infrared light for communication and is not popular, and RJ-45 is a type of networking
connector.
- One of your coworkers has purchased an external Bluetooth trackpad to use with their
tablet. They’ve turned to you, the company IT person, to install and configure it for them.
What actions will you need to take? (Choose two.)
A. Plug the device into a USB port.
B. Install drivers.
C. Put the device in pairing mode and open Bluetooth settings on the tablet, then tap the
trackpad.
D. Go to Settings to configure speed and scrolling features.
- C, D. Configuring a new Bluetooth trackpad is a fairly simple procedure. You first need to
pair the device with the tablet, then configure it for speed and clicking and such. The CompTIA A+ objectives list the steps for connecting Bluetooth devices as follows: - Enable Bluetooth.
- Enable pairing.
- Find a device for pairing.
- Enter the appropriate PIN code.
- Test connectivity.
- What type of connection are you using if you use a USB cable to connect your laptop to your
cell phone in order to use the cellular wireless connection from the laptop?
A. Hotspot
B. Tethering
C. USB networking
D. Phoning
- B. Tethering is connecting a device to a mobile hotspot. The term used to be reserved only
for when you were connected via USB cable, as opposed to connecting via wireless. Some
devices will not function as a mobile hotspot but will allow you to tether a mobile device to
it with a USB cable so that the mobile device can share the cellular Internet connection
- A user needs ports for external devices in addition to what their laptop is capable of
connecting. The user would like these devices to have connectivity with each other whether
or not the laptop is there. Which of the following will provide that option?
A. Docking station
B. Port replicator
C. KVM switch
D. Docking port
B. A port replicator is an attachment that provides the same ports as or additional ports to a laptop. The devices can communicate with each other via the port replicator whether or
not the laptop is there.
Docking stations are similar to port replicators because they provide
a single connection to a laptop that will connect several devices, but the point of the docking station is to effectively make a laptop function as a desktop PC.
Whereas a docking station may (or may not) be a proprietary device, a port replicator is not, and will generally provide
a connection to the external devices via a USB or similar port.
Docking station can also mean a charging cradle for a smartphone or tablet. KVM switches allow multiple system units to
share a keyboard, video and mouse. Docking port is not an actual term.
- What port looks identical to a Thunderbolt 3 connector but will not charge a connected
device as quickly?
A. USB-C
B. miniUSB
C. USB A
D. microUSB
- A. USB-C uses an oval port that looks identical to Thunderbolt 3, and both can be used to
transfer data and power to a device, but Thunderbolt 3 does it much faster, at 40 Gbps. To
tell them apart, look for the lightning bolt on a Thunderbolt cable or port.
- You’re the IT manager for a manufacturing company. One of the corporate executives is
questioning why you’re buying serial instead of parallel devices. You explain that serial
transmits only one bit of information at a time, but it does so very fast compared to parallel.
Which of the following will you tell them is not a serial connection?
A. Centronics
B. Thunderbolt
C. Lightning
- A. Centronics is a common name for a parallel port. Parallel ports are now legacy because serial communications are so much faster. Thunderbolt, Lightning, and USB-C all use serial
communications, and they are very fast.
- You will be traveling to another country for work and will have a 10-hour airplane flight.
You need to work on your laptop while on the flight, but your battery won’t last that long.
What should you buy to allow you to use the auxiliary power outlets on the airplane?
A. AC adapter
B. DC adapter
C. Power inverter
D. Docking station
- B. A DC power adapter allows a user to plug the laptop into the DC power source (usually
called an auxiliary power outlet) inside a car or on an airplane. AC power adapters are for
plugging into standard wall outlets. Some airplanes now provide AC power outlets to their
passengers as well.
- You have enabled the GPS service in your tablet. What is the minimum number of GPS satellites your tablet needs to be in contact with to determine its location?
A. One
B. Two
C. Three
D. Four
- C. GPS systems were designed to require multiple satellites. Receivers use a process called
triangulation, which they use to calculate the distance between themselves and the satellites
(based on the time it takes to receive a signal) to determine their location. They require input
from four satellites to provide location and elevation or three to provide location
- The AC adapter for your laptop is not working properly, and you are searching for a
replacement. Which two factors should be most important when selecting a new AC adapter?
(Choose two.)
A. Polarity
B. Same wattage as the original
C. Brand of the adapter
D. Size of the adapter
- A, B. You should choose an AC adapter rated for the same wattage as the original. You must
also pay special attention to the voltage and polarity of the plug that interfaces with the
laptop. If the laptop requires the positive lead to be the center conductor, for instance, then
you must take care not to reverse the polarity. It’s best to find one that advertises compatibility with the device it will be charging.
- A technician needs to replace a failed laptop hard drive. Which of the following form factors
could it use?
A. 1.3″
B. 2.0″
C. 2.5″
D. 3.5″
- C. An older laptop hard drive will be one of two form factors (sizes): 1.8″, which is now
considered legacy, or 2.5″. Modern laptops most likely use either mSATA or M.2 drives,
which are thinner than a RAM module and much smaller. Desktop computers have historically used 3.5″ hard drives.
- You want to play video games on your tablet computer. Which accessory would you purchase
if you wanted to play the game much like you would on a gaming console?
A. Docking station
B. Touch pad
C. Point stick
D. Game pad
- D. A good game controller can make your mobile device feel a bit more like a gaming
console. Most of the game pads will look like standard console controllers and connect via
Bluetooth. Touchpads and pointing sticks are input devices like a mouse. Touchpads are usually rectangular areas on a laptop where your finger movements replace moving a mouse.
A pointing stick will usually be in the middle of a keyboard and is controlled with a single
finger pushing the stick in any direction. A docking station lets a laptop connect to multiple
devices with a single connection on the laptop, enabling the user to use it easily with fullsized devices like a desktop PC.
- Your new laptop has 4 GB system RAM and an integrated video card. The default setting
specifies 512 MB of video memory. How much RAM is available for the processor to use?
A. 4 GB.
B. 3.5 GB.
C. 3 GB.
D. It’s variable.
- B. Many laptops use shared video memory, meaning that system RAM is divided up for use
between the processor and the video card. On these types of systems, the amount of RAM
available for video is configured in the BIOS/UEFI. Anything reserved for the video card is
unavailable to the processor. In this case, subtracting half a gigabyte from 4 GB leaves the
CPU with 3.5 GB.
- Which type of network connection is least likely to be found on a tablet computer?
A. Wi-Fi
B. Bluetooth
C. RJ-45
D. Cellular
- C. RJ-45 is an 8-pin connector commonly used to connect computers to a local area network
(LAN). Tablets are designed for mobile communication. As such, most tablets come equipped
with Wi-Fi and Bluetooth, and many have cellular capabilities as well.
- You are upgrading a laptop with a Mini PCIe card. What type of connector does
Mini PCIe use?
A. 52-pin
B. 68-pin
C. 144-pin
D. 200-pin
- A. Mini PCIe cards use a 52-pin connector. The Mini PCIe cards are 30 mm wide and come
in full length (50.95 mm) and half length (26.8 mm). 68-pin connectors are used with SCSI
devices, whereas 144-pin and 200-pin are SODIMM connector sizes.
- What is the likely type of Wi-Fi antenna connector you will find as an external connector
on a laptop?
A. SMA-female-RP
B. N-male
C. SMA-male-RP
D. N-female
- A. The overwhelming majority of Wi-Fi antenna connectors for indoor-rated antennas found
on laptops are type SMA (SubMiniature version A). On the device will be an SMA-female.
What makes a connector “male” is the center pin and threads on the inside, while a “female”
connector will have a receptor for the pin and threads on the outside. RP (reverse polarity)
means that the pin and receptor are in opposite positions with regard to connector gender
while the outside housing remains the same. SMA-RP and SMA are therefore not compatible
with each other. N-type connectors look similar but are weatherproof and larger than SMA
connectors.
- A warehouse manager at a factory is required to supervise productivity while walking around
and taking notes. They find their laptop awkward to type on while walking but do not want
to use two devices. What would you recommend they do?
A. Get a small tablet to synchronize with the laptop.
B. Place accessible workstations throughout the factory.
C. Get a laptop with a rotating or removable screen.
D. Get a smaller laptop
- C. Laptops with a rotating or removable screen allow the touchscreen to function like a
tablet. This allows the warehouse manager to take notes with a tablet while keeping the
laptop for their desk.
- After enabling your device for communication using the IEEE 802.15.1 standard, what is the
next step?
A. Enter the PIN code.
B. Find a device for pairing.
C. Enable pairing.
D. Open port 802.15.1.
- C. The IEEE standard 802.15.1 is commonly known as Bluetooth. The CompTIA A+ objectives list the steps for connecting Bluetooth devices as follows:
- Enable Bluetooth.
- Enable pairing.
- Find a device for pairing.
- Enter the appropriate PIN code.
- Test connectivity.
Not all Bluetooth devices require entering a pin. Opening a port is done on a router to allow
a particular type of traffic to pass through the router to a connected network.
- You’re configuring private email on a coworker’s cell phone. They want to make sure all
of their mail will be only on their phone. Which mail protocol keeps all emails stored on a
single device and can only be accessed from one device?
A. IMAP
B. SMTP
C. POP3
D. S/MIME
- C. POP3 (Post Office Protocol 3) keeps emails stored on one device. This means both sent
and received messages are stored on that one device, so all email is accessed from that
device. The IMAP (Internet Message Access Protocol) downloads mail but leaves a copy on
the server. SMTP (Simple Mail Transfer Protocol) is a protocol for sending (not receiving)
mail. S/MIME (Secure Multipurpose Internet Mail Extensions) is an encryption standard for
securing email.
- You’re configuring company email on a coworker’s phone. The company needs to keep a
copy of every email on their server, even after it’s accessed by the user. Which mail protocol
keeps all emails stored on the server, allowing messages to be synchronized between multiple devices?
A. IMAP
B. SMTP
C. POP3
D. S/MIME
- A. Internet Messaging Access Protocol (IMAP) keeps a copy of emails on the server. This
allows someone to view and work with their email from more than one device. SMTP
(Simple Mail Transfer Protocol) is a protocol for sending (not receiving) mail. POP3 (Post
Office Protocol 3) downloads mail to a device and does not leave a copy on a server. Once
downloaded, mail can only be read on that device. S/MIME (Secure Multipurpose Internet
Mail Extensions) is an encryption standard for securing email.
