CompTIA A+ 5.5 Core 1 - Troubleshooting Mobile Devices

A+ OBJECTIVE 5.5 HARDWARE AND NETWORK TROUBLESHOOTING – TROUBLESHOOTING MOBILE DEVICES

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What is a common cause of mobile device damage that is not covered under warranty?

Physical impact or dropping the device

Liquid damage

Manufacturing defects

Software malfunctions

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What can negatively impact the performance of Wi-Fi networks?

Using a high-speed internet connection

Upgrading the router firmware

Increasing the bandwidth of the network

Interference from other Wi-Fi networks or devices on the same frequency

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What factor significantly affects signal strength on mobile networks?

Location, with cellular networks providing larger coverage areas than Wi-Fi networks

The device's processor speed

The capacity of the device's battery

The number of apps installed on the device

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What can cause charging issues on mobile devices?

Insufficient signal strength on cellular networks

Dirty connectors, damaged cables, or insufficient voltage

Using a faulty power adapter

Overcharging the device

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What is the recommended action for cracked glass on a mobile device?

Ignore the crack and continue using the device

Leave it uncovered for better visibility

Cover with tape for safe use and backup

Replace the entire display immediately

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What material are screens on mobile devices commonly made of?

Glass

Metal

Ceramic

Plastic

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What should be done if a mobile device battery becomes swollen?

Puncture the battery to release the pressure

Continue using the device normally

Replace with a new battery and dispose of old one at a hazardous waste facility

Open and inspect the battery for damage

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What type of batteries are commonly used in mobile phones and tablets?

Nickel-Cadmium batteries

Rechargeable lithium-ion batteries

Alkaline batteries

Lead-acid batteries

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What does airplane mode do on a mobile device?

Disables cellular, Wi-Fi, Bluetooth, and GPS radios to save battery

Enables all radios to conserve battery life

Boosts signal strength for cellular and Wi-Fi networks

Improves GPS accuracy and performance

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What should be done if a phone or tablet screen is unresponsive?

Connect the device to a charger

Perform a soft reset or hard reset depending on the device

Place the device in water to resolve the unresponsiveness

Leave it as it is and hope it becomes responsive later

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What is recommended to avoid in order to prevent rapid heating up of a phone or tablet?

Avoid direct sunlight

Charge the device in a humid area

Wrap the device in a blanket while charging

Leave the device on while charging

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How can one identify apps causing excessive heat in mobile devices according to the text?

Remove the battery

Expose the device to direct sunlight

Use app usage utilities

Leave the device charging overnight

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What can damage mobile devices?

Sim card removal

Airplane Mode

Silica gel packs

Heat

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What is the recommended action to recover a wet device?

Connect it to a power source immediately

Turn it on to check if it still works

Let it completely dry out in a very dry area without turning it on, charging it, or connecting it to any power source

Shake out the excess liquid and use a hairdryer to dry it

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Which is a better option for drying out a wet phone?

Direct sunlight

Silica gel packs

Hairdryer

Rice

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What is the recommended action if a phone or tablet gets wet?

Leave it on to dry out the liquid

Use rice to remove the liquid

Immediately power down and remove components

Place it in direct sunlight to dry it quickly

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What is the purpose of liquid contact indicators (LCIs) installed in devices by phone manufacturers?

To absorb liquid from the device

To detect liquid contact

To prevent liquid contact

To charge the device

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What should you do if there are no obvious malware symptoms on your mobile device?

Expect faster data transfer rate

Replace the system board

Ignore the symptoms

Run a third-party antivirus scan

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What is a potential indicator of cursor drift on a device?

High CPU usage

Cursor moving without touch input

Unusual applications installed

Constant overheating

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What is a challenge commonly faced with all devices, mobile or otherwise?

Normal CPU usage

Excessive cursor drift

Threat of malware and malicious applications

Low data transfer rate

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What can be a consequence of an infected mobile device running a process constantly?

Continued battery depletion

Reduced system board replacement cost

Normal battery usage

Better calibration for cursor drift

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What is a potential indication of malware on a mobile device?

Unusual pop-up messages

Expected data transfer rate

Low CPU usage

High battery usage

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How can cursor drift be prevented on older technologies?

Reducing CPU usage

Replacing the system board

Touching different places on the screen to recalibrate

Using third-party antivirus software

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What should you check for if you suspect your mobile device may be infected by malware?

Faster data transfer rate

Unusual cursor drift

Expected battery depletion

Normal CPU usage

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How can you minimize battery use even on systems with a brand new battery?

Enable maximum performance mode

Constantly update the device's software

Be aware of the reception for your device

Keep the device connected to a power source at all times

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What action can help save battery life when outside the signal range for your provider?

Enabling airplane mode

Clearing the cache memory

Increasing the volume level

Disabling the screen brightness

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Why does a mobile phone constantly trying to reconnect to a signal drain the battery?

It leads to faster battery degradation

It causes the battery to overheat

It increases the battery's capacity

It has no effect on the battery

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What happens to the capacity of a battery each time it is recharged?

It fluctuates

It increases

It remains the same

It degrades

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CompTIA A+ 5.5 Core 1 – Troubleshooting Mobile Devices