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CompTia A+ > Mobile Devices > Flashcards

Mobile Devices Flashcards

1
Q

What are common laptop battery types?

A

Nickel-Cadmium (NiCd)
Nickel-metal Hydride (NiMH)
Lithium-ion (Li-ion)
Lithium-polymer (Li-poly)

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2
Q

What is SODIMM and where do you find it?

A

Small Outline Inline Memory Module (SODIMM) is the industry standard FORM FACTOR for laptop RAM

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3
Q

Does SODIMM have to be compatible with the motherboard?

A

Yes

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4
Q

What are these types of?
200-pin DDR
200-pin DDR2
204-pin DDR3
260-pin DDR4
262-pin DDR5
32 or 64 bit configurations

A

SODIMM (small outline inline memory module) RAM (for laptops)

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5
Q

How do you migrate info during Hard Disk Drive (HDD) or Solid State Drive replacement?

A

Manually or through migration software.
Move all data to a new location (cloud or external device) & copy to new drive once installed.
Manual is preferred for simple user data.
Manual migration does NOT include user settings / config.
Migration software moves files, setting configurations, & apps. Both drives usually need to be accessible during the migration.

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6
Q

What are the 3 form facotrs of HDDs and SSDs for laptops?

A

1.8”, 2.5”, M.2.

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7
Q

A SATA cable connects a laptop to its HHD/SSD drive. What does this cable provide?

A

Power & Data

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8
Q

How do you replace a NIC (network interface card)?

A

Remove the bottom cover, remove the screw, disconnect the two antenna wires, pull straight out of the M.2 socket - replace and reverse.

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9
Q

What are the two primary types of mobile display units?

A

Liquid crystal display (LCD) - 3 popular variants are IPS (in-plane switching), TN (twisted nematic), VA (vertical alignment). Current passes through a semi-crystalline liquid. A backlight is required.
Organic light-emitting diode (OED) - the image-producing components & the light source are in a single panel. The organic light-emitting compound sits between an anode and a cathode, which produces a current. As the current runs through it, the compound produces light. Popular in high-end monitors & small devices like phones. Good for curved displays; power consumption is lower and contrast ratio is higher than an LCD.

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10
Q

Which is best for a wide viewing angle: IPS, TN, or VA?

A

IPS

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11
Q

What is best for competitive gamers: IPS, TN or VA?

A

TN (oldest LCD technology but also the quickest.)

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12
Q

Which has the best contrast ratio: IPS, TN or VA?

A

VA (best contrast ratio & middle ground for colour / lag)

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13
Q

Which is best for graphic artists: IPS, TN, or VA?

A

IPS

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14
Q

802.11 standard = wireless

A
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15
Q

What are 5 parts of a laptop display unit?

A

backlight (for LCDs)
inverter (analog to digital) (LCDs)
screen (LCD or OLED)
digitizer (if touch screen)
webcam
microphone
WiFi antenna

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16
Q

If the laptop offers wireless, it has a Wi-Fi antenna.

A

Usually placed in the top of the clamshell case to it’s higher up and gets better reception. The wire runs through the hinge into the bottom shell & plugs into the motherboard.

17
Q

What is an inverter?

A

Small circuit board located behind an LCD panel that turns DC current into AC current (which is needed by the backlight). Common cause of flickering screens & dimness.

18
Q

What are the two main types of RAM?

A

SODIMM and DIMM
SO-DIMM is half the size of DIMM so are usually used in laptops, notebooks, small PCs & home theatre setups
The motherboard has to be compatible with the type of RAM you choose.
SODIMM will not fit in a DIMM slot

19
Q

What is the most common RAM form factor?

A

DIMM or Dual In-Line Memory Module

20
Q

Is a Lightning cable proprietary?

A

Yes - it’s an Apple product for iPhones & iPads. Macs may use lightning ports for charging only (instead of data & power like iPhones)

21
Q

What is a serial interface used for?

A

Allows serial data transfer in small bits between devices.
USBs, Thunderbolt, & HDMI are all serial connections.
Common accessories include displays, external hard drives, and input/output devices.

22
Q

What is a port replicator?

A

Allows for a compatible laptop to connect to additional ports, such as the ones built in to the laptop, and can be used for a keyboard, mouse or printer. Allows for continual connection.

23
Q

What generations of cellular are there?

A

2G (telephone circuits)
3G (telephone circuits)
4G (IP instead of telephone) (2 varieties: WiMax & Long-Term Evolution or LTE). Higher range and faster upload/download speeds.
5G:
3 5G classifications - enhanced mobile broadband (eMBB) for cell phone & mobile communication
URLLC (ultra-reliable low-latency communications) for autonomous vehicles & industrial applications)
Massive machine-type communications (mMTC) for IOT device sensors.

24
Q

What are Preferred Roaming List (PRL) Updates?

A

Updates to the reference guide used by mobile phones to connect to the appropriate cell phone tower. The guide usually updates with phone updates.

25
Q

What is GSM (global system for mobile communication) vs. CDMA (code-division multiple access)?

A

Both are obsolete 3G standards. Were incompatible with eachother and used by competing providers.

26
Q

Are GPS and cellular location services the same thing?

A

Nope. GPS is satellite based; uses triangulation between receivers & satellites. 3 main components: the satellite constellation, the ground control network, & the receiver.
Cell location is obvs based on connection to cell towers (triangulation) and are carrier-based.

27
Q

What’s the difference between MDM (mobile device management) & MAM (Mobile application Management)?

A

MDM implements security policies and allows remote tracking, locking, unlocking, encryption, wiping, etc.
MAM is for remote installation, deletion, encryption & wiping of corporate apps and related data.

28
Q

Microsoft 365
Google Workspace
Apple Cloud

A

Microsoft Cloud
Google Workspace / Google Drive
iCloud (Apple ID for access)

CompTia A+ (7 decks)

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