Sample questions
CompTIA A+ Core 1 220-1201 practice questions
During a network cable installation, a technician needs to verify that a newly run Cat6 cable is properly terminated and free of shorts or opens. The cable is not yet connected to any switch or device. Which tool should the technician use?
Trap 1: Tone generator and probe
A tone generator and probe are used to trace a specific cable among many, not to test termination quality.
Trap 2: Multimeter
A multimeter can check continuity but is less efficient for testing all eight wires and proper pairing in a twisted-pair cable.
Trap 3: Loopback plug
A loopback plug is used to test a network port by sending signals back to itself, not to test a standalone cable.
- A
Tone generator and probe
Why wrong: A tone generator and probe are used to trace a specific cable among many, not to test termination quality.
- B
Multimeter
Why wrong: A multimeter can check continuity but is less efficient for testing all eight wires and proper pairing in a twisted-pair cable.
- C
Cable tester
A cable tester is designed specifically to verify wiring continuity, correct pinout, and absence of shorts or opens in network cables.
- D
Loopback plug
Why wrong: A loopback plug is used to test a network port by sending signals back to itself, not to test a standalone cable.
A user connects a 4K monitor to their laptop using a USB-C port. The monitor is detected, but the resolution is stuck at 1920x1080. The laptop supports 4K output via USB-C. What is the most likely reason?
Trap 1: The monitor's HDMI port is defective
The monitor is detected, so the port works; the issue is resolution, not connectivity.
Trap 2: The laptop's graphics driver is outdated
A driver issue would likely cause no detection or artifacts, not a specific resolution limit.
Trap 3: The monitor's refresh rate is set too high
Refresh rate settings don't prevent a resolution from being selected; the OS typically offers the highest supported resolution.
- A
The monitor's HDMI port is defective
Why wrong: The monitor is detected, so the port works; the issue is resolution, not connectivity.
- B
The USB-C cable does not support DisplayPort Alt Mode
Without DisplayPort Alt Mode, the cable cannot transmit the high bandwidth needed for 4K video, limiting resolution.
- C
The laptop's graphics driver is outdated
Why wrong: A driver issue would likely cause no detection or artifacts, not a specific resolution limit.
- D
The monitor's refresh rate is set too high
Why wrong: Refresh rate settings don't prevent a resolution from being selected; the OS typically offers the highest supported resolution.
A technician is troubleshooting a laptop that will not charge. The battery is removable, and the power adapter works on another laptop. When the battery is inserted, the laptop powers on but shows '0% available (plugged in, not charging)'. What is the most likely cause?
Trap 1: The charging port is loose.
A loose port would cause intermittent charging or no power at all, not a consistent 'not charging' status.
Trap 2: The power management driver is outdated.
Driver issues can cause charging problems, but a hardware failure is more likely given the battery's age and symptoms.
Trap 3: The CMOS battery is dead.
A dead CMOS battery affects system clock and BIOS settings, not main battery charging.
- A
The battery is defective and needs replacement.
A battery that cannot charge despite being detected is typically failed; replacing it resolves the issue.
- B
The charging port is loose.
Why wrong: A loose port would cause intermittent charging or no power at all, not a consistent 'not charging' status.
- C
The power management driver is outdated.
Why wrong: Driver issues can cause charging problems, but a hardware failure is more likely given the battery's age and symptoms.
- D
The CMOS battery is dead.
Why wrong: A dead CMOS battery affects system clock and BIOS settings, not main battery charging.
A customer brings in a smartphone with a broken charging port. They want the port replaced. During disassembly, the technician finds that the charging port is soldered directly to the main board. Which tool is essential for this repair?
Trap 1: A heat gun with a narrow nozzle.
A heat gun is used for reflowing BGA chips, not for desoldering a small port; it may overheat the board.
Trap 2: A Phillips-head screwdriver.
A screwdriver is used for screws, not for soldered components.
Trap 3: A plastic spudger.
A spudger is for prying and disconnecting cables, not for soldering.
- A
A heat gun with a narrow nozzle.
Why wrong: A heat gun is used for reflowing BGA chips, not for desoldering a small port; it may overheat the board.
- B
A soldering iron with a fine tip.
A fine-tip soldering iron allows precise desoldering and soldering of the small pins on the charging port.
- C
A Phillips-head screwdriver.
Why wrong: A screwdriver is used for screws, not for soldered components.
- D
A plastic spudger.
Why wrong: A spudger is for prying and disconnecting cables, not for soldering.
A user reports that their laptop's keyboard types random characters when certain keys are pressed. The laptop has not been dropped or spilled on. What is the most likely hardware issue?
Trap 1: The keyboard driver is corrupted.
Driver issues typically cause no response or wrong characters from specific keys, not random characters from unrelated keys.
Trap 2: The keyboard ribbon cable is loose.
A loose cable would cause some keys to not work or intermittent failure, not random character output.
Trap 3: The operating system has a malware infection.
Malware can simulate keystrokes, but it would usually produce consistent patterns, not random characters on key press.
- A
The keyboard driver is corrupted.
Why wrong: Driver issues typically cause no response or wrong characters from specific keys, not random characters from unrelated keys.
- B
The keyboard ribbon cable is loose.
Why wrong: A loose cable would cause some keys to not work or intermittent failure, not random character output.
- C
The keyboard has an internal short or faulty controller.
An internal short can cause ghost key presses, leading to random characters. Replacement is necessary.
- D
The operating system has a malware infection.
Why wrong: Malware can simulate keystrokes, but it would usually produce consistent patterns, not random characters on key press.
A technician is troubleshooting a laptop that shuts down randomly after a few minutes of use. The fan is spinning, and the vents are clear. The CPU temperature reaches 95°C quickly. What is the most likely cause?
Trap 1: The fan is running at low speed due to a faulty fan controller.
The fan is spinning, so the controller is likely fine; the issue is thermal transfer, not fan speed.
Trap 2: The CPU is faulty and needs replacement.
A faulty CPU is possible but less likely than a thermal paste issue; overheating is a common symptom of poor thermal contact.
Trap 3: The BIOS is set to an aggressive power-saving mode.
Power-saving modes reduce performance, not cause overheating; they would lower temperatures.
- A
The fan is running at low speed due to a faulty fan controller.
Why wrong: The fan is spinning, so the controller is likely fine; the issue is thermal transfer, not fan speed.
- B
The thermal paste between the CPU and heatsink has dried out.
Dried thermal paste reduces heat transfer, causing rapid overheating even with a working fan.
- C
The CPU is faulty and needs replacement.
Why wrong: A faulty CPU is possible but less likely than a thermal paste issue; overheating is a common symptom of poor thermal contact.
- D
The BIOS is set to an aggressive power-saving mode.
Why wrong: Power-saving modes reduce performance, not cause overheating; they would lower temperatures.
A user reports that their laptop battery no longer charges and the system only runs when plugged in. You test the AC adapter and it outputs correct voltage. Inside the battery, which component is most likely failed?
Trap 1: The lithium-ion cells have degraded.
Degraded cells would still show some charge or cause shorter runtime, not a complete failure to charge.
Trap 2: The DC jack on the laptop is loose.
The DC jack issue would affect power to the whole system, but the system runs fine on AC adapter.
Trap 3: The laptop's motherboard charging circuit is damaged.
If the motherboard circuit were bad, the system wouldn't run on AC power either.
- A
The lithium-ion cells have degraded.
Why wrong: Degraded cells would still show some charge or cause shorter runtime, not a complete failure to charge.
- B
The battery management system (BMS) is faulty.
A failed BMS prevents the battery from communicating with the charger and accepting power, causing no charging.
- C
The DC jack on the laptop is loose.
Why wrong: The DC jack issue would affect power to the whole system, but the system runs fine on AC adapter.
- D
The laptop's motherboard charging circuit is damaged.
Why wrong: If the motherboard circuit were bad, the system wouldn't run on AC power either.
You are deploying 50 tablets for a school and need to secure them in kiosk mode so students can only access a specific learning app. Which hardware servicing step is essential before configuring the software?
Trap 1: Install a screen protector on each tablet.
While protective, this is not essential for kiosk mode configuration.
Trap 2: Remove the SIM card from each tablet.
SIM removal is unnecessary unless cellular access is restricted; kiosk mode can be set with or without it.
Trap 3: Replace the stock ROM with a custom firmware.
Custom firmware voids warranty and is not standard practice for enterprise deployment; kiosk mode uses built-in OS features.
- A
Install a screen protector on each tablet.
Why wrong: While protective, this is not essential for kiosk mode configuration.
- B
Charge each tablet to at least 50% and apply all system updates.
A charged, updated device ensures stable configuration without power loss or update interruptions.
- C
Remove the SIM card from each tablet.
Why wrong: SIM removal is unnecessary unless cellular access is restricted; kiosk mode can be set with or without it.
- D
Replace the stock ROM with a custom firmware.
Why wrong: Custom firmware voids warranty and is not standard practice for enterprise deployment; kiosk mode uses built-in OS features.
A user complains that their smartphone's battery drains quickly even when idle. You run diagnostics and find the battery health is at 82%. The device is two years old. Which hardware servicing action is most appropriate?
Trap 1: Calibrate the battery by fully draining and recharging.
Calibration helps with inaccurate charge reporting, not with actual capacity loss.
Trap 2: Update the operating system to the latest version.
OS updates may improve efficiency but won't fix hardware degradation of the battery.
Trap 3: Disable all background apps and notifications.
This is a software workaround, not a hardware servicing solution for a degraded battery.
- A
Replace the battery with a new OEM battery.
At 82% health, the battery is degraded; replacement directly addresses the drain issue.
- B
Calibrate the battery by fully draining and recharging.
Why wrong: Calibration helps with inaccurate charge reporting, not with actual capacity loss.
- C
Update the operating system to the latest version.
Why wrong: OS updates may improve efficiency but won't fix hardware degradation of the battery.
- D
Disable all background apps and notifications.
Why wrong: This is a software workaround, not a hardware servicing solution for a degraded battery.
A laptop's touchpad is not working correctly; the cursor jumps erratically. You have already updated the driver and checked for debris. What hardware component should you inspect or replace next?
Trap 1: Replace the entire keyboard assembly.
The keyboard is separate from the touchpad; replacing it won't fix touchpad issues.
Trap 2: Replace the laptop's LCD screen.
The LCD screen has no relation to touchpad input.
Trap 3: Reinstall the operating system.
Driver update already done; reinstalling OS is excessive and unlikely to fix a hardware connection issue.
- A
Replace the entire keyboard assembly.
Why wrong: The keyboard is separate from the touchpad; replacing it won't fix touchpad issues.
- B
Reseat the touchpad ribbon cable on the motherboard.
A loose or partially connected ribbon cable is a common cause of erratic touchpad behavior.
- C
Replace the laptop's LCD screen.
Why wrong: The LCD screen has no relation to touchpad input.
- D
Reinstall the operating system.
Why wrong: Driver update already done; reinstalling OS is excessive and unlikely to fix a hardware connection issue.
A user brings in a smartphone with a cracked screen that is still responsive to touch. The device is an older model, and the user wants the screen replaced rather than buying a new phone. After powering off the device and removing the SIM and SD cards, what is the next step in the screen replacement process?
Trap 1: Use a spudger to pry the screen off starting from the bottom.
Prying without heating the adhesive first can crack the glass or damage the display. Heat softens the adhesive, making removal safer.
Trap 2: Remove the battery using a plastic pry tool.
Removing the battery is not the immediate next step; the screen must be detached first. Battery removal may be needed later for access, but not before heating.
Trap 3: Insert a guitar pick under the screen to separate it from the frame.
Inserting a pick without heating first can cause the screen to crack. Heat must be applied to loosen the adhesive before any prying.
- A
Use a spudger to pry the screen off starting from the bottom.
Why wrong: Prying without heating the adhesive first can crack the glass or damage the display. Heat softens the adhesive, making removal safer.
- B
Apply heat to the edges of the screen to soften the adhesive.
Heating the edges softens the adhesive, allowing the screen to be lifted with minimal force and reducing the risk of further damage.
- C
Remove the battery using a plastic pry tool.
Why wrong: Removing the battery is not the immediate next step; the screen must be detached first. Battery removal may be needed later for access, but not before heating.
- D
Insert a guitar pick under the screen to separate it from the frame.
Why wrong: Inserting a pick without heating first can cause the screen to crack. Heat must be applied to loosen the adhesive before any prying.
A customer complains that their laptop battery no longer holds a charge and the laptop only works when plugged in. The technician confirms the battery is removable. What is the most appropriate first step in servicing this issue?
Trap 1: Update the battery driver in Device Manager.
Driver updates won't fix a physically worn-out battery. The battery has reached end of life and needs replacement.
Trap 2: Run a battery calibration utility from the manufacturer.
Calibration may help with inaccurate charge reporting but cannot restore a battery that no longer holds a charge. Replacement is needed.
Trap 3: Replace the AC adapter to see if the charging circuit is faulty.
The symptom is that the laptop works only when plugged in, indicating the battery cannot hold charge. The AC adapter is likely fine.
- A
Update the battery driver in Device Manager.
Why wrong: Driver updates won't fix a physically worn-out battery. The battery has reached end of life and needs replacement.
- B
Run a battery calibration utility from the manufacturer.
Why wrong: Calibration may help with inaccurate charge reporting but cannot restore a battery that no longer holds a charge. Replacement is needed.
- C
Power off the laptop and remove the battery.
Powering off and removing the battery is the safe first step before replacing it. This prevents electrical hazards and damage.
- D
Replace the AC adapter to see if the charging circuit is faulty.
Why wrong: The symptom is that the laptop works only when plugged in, indicating the battery cannot hold charge. The AC adapter is likely fine.
During a laptop keyboard replacement, a technician accidentally dislodges a small ribbon cable from the touchpad connector. The touchpad is now unresponsive. The technician has never worked on this model before. What is the best course of action to resolve the issue?
Trap 1: Use tweezers to gently push the ribbon cable into any nearby empty…
The cable must be inserted into its specific connector; using an arbitrary connector will not work and may cause a short circuit.
Trap 2: Reboot the laptop to see if the touchpad driver reloads.
The issue is physical disconnection, not a driver problem. Rebooting will not fix a loose cable.
Trap 3: Replace the entire keyboard assembly since the touchpad cable is…
The cable is merely dislodged, not broken. Replacing the entire assembly is unnecessary and costly.
- A
Use tweezers to gently push the ribbon cable into any nearby empty connector.
Why wrong: The cable must be inserted into its specific connector; using an arbitrary connector will not work and may cause a short circuit.
- B
Reboot the laptop to see if the touchpad driver reloads.
Why wrong: The issue is physical disconnection, not a driver problem. Rebooting will not fix a loose cable.
- C
Consult the service manual to identify the correct connector and reseat the cable.
The service manual provides the exact location and orientation for the touchpad ribbon cable, ensuring proper reconnection.
- D
Replace the entire keyboard assembly since the touchpad cable is likely broken.
Why wrong: The cable is merely dislodged, not broken. Replacing the entire assembly is unnecessary and costly.
A customer reports that after a recent fall, their smartphone's screen is completely black, but the device still vibrates when calls come in. The technician suspects the display cable is loose. What is the correct sequence of steps to access and reseat the display cable?
Trap 1: Remove the battery first, then the back cover, and reseat the…
The back cover must be removed first to access the battery and internal components. Removing the battery before the cover is not possible.
Trap 2: Reseat the display cable by inserting a spudger through the…
The display cable is internal and not accessible from the charging port. This approach is impossible and would damage the port.
Trap 3: Perform a factory reset to rule out software issues.
The device vibrates for calls, indicating it powers on. A black screen with vibration suggests a hardware display issue, not software. A reset would not fix a loose cable.
- A
Remove the battery first, then the back cover, and reseat the display cable.
Why wrong: The back cover must be removed first to access the battery and internal components. Removing the battery before the cover is not possible.
- B
Remove the back cover, disconnect the battery, then reseat the display cable.
This is the correct sequence: back cover off, battery disconnected for safety, then reseat the display cable. It prevents short circuits and damage.
- C
Reseat the display cable by inserting a spudger through the charging port.
Why wrong: The display cable is internal and not accessible from the charging port. This approach is impossible and would damage the port.
- D
Perform a factory reset to rule out software issues.
Why wrong: The device vibrates for calls, indicating it powers on. A black screen with vibration suggests a hardware display issue, not software. A reset would not fix a loose cable.
A technician is servicing a tablet that will not power on. The technician has confirmed the battery is charged by testing it with a multimeter (voltage within spec). The power button feels normal when pressed. What is the most likely hardware component that has failed, and how should it be addressed?
Trap 1: Replace the LCD screen assembly.
The tablet does not power on at all (no vibration, no sound), not just a black screen. The LCD is not the cause of a complete power failure.
Trap 2: Replace the motherboard.
Motherboard failure is possible but less likely than a simple connection issue. The technician should check simpler components first.
Trap 3: Perform a hard reset by holding the power and volume buttons for 30…
A hard reset is a software troubleshooting step, but the technician has already confirmed the battery is charged and the button feels normal. The issue is likely hardware, not software.
- A
Replace the LCD screen assembly.
Why wrong: The tablet does not power on at all (no vibration, no sound), not just a black screen. The LCD is not the cause of a complete power failure.
- B
Replace the motherboard.
Why wrong: Motherboard failure is possible but less likely than a simple connection issue. The technician should check simpler components first.
- C
Reseat or replace the power button flex cable.
A loose or damaged power button flex cable can prevent the power button from sending the signal to the motherboard, even if the button feels normal.
- D
Perform a hard reset by holding the power and volume buttons for 30 seconds.
Why wrong: A hard reset is a software troubleshooting step, but the technician has already confirmed the battery is charged and the button feels normal. The issue is likely hardware, not software.
A customer reports that their new Bluetooth headphones pair with their smartphone but produce no audio during calls. The headphones work fine with other devices. What is the most likely cause?
Trap 1: The headphones are out of battery.
If the headphones were out of battery, they would not pair or produce any audio at all, not just during calls.
Trap 2: The smartphone's Bluetooth antenna is damaged.
A damaged antenna would likely cause intermittent or no connectivity, not a profile-specific failure.
Trap 3: The headphones are paired to too many devices simultaneously.
Most Bluetooth headphones connect to one device at a time; multi-point pairing is limited and would not cause profile-specific silence.
- A
The headphones are out of battery.
Why wrong: If the headphones were out of battery, they would not pair or produce any audio at all, not just during calls.
- B
The smartphone's Bluetooth antenna is damaged.
Why wrong: A damaged antenna would likely cause intermittent or no connectivity, not a profile-specific failure.
- C
The smartphone does not support the required Bluetooth profile for call audio.
Bluetooth profiles like HFP or HSP are needed for call audio; A2DP only handles music. If the phone lacks these profiles, calls will be silent.
- D
The headphones are paired to too many devices simultaneously.
Why wrong: Most Bluetooth headphones connect to one device at a time; multi-point pairing is limited and would not cause profile-specific silence.
A technician is configuring a tablet for field workers who need to transfer large files to a central server. The tablet has a USB-C port. Which connection method provides the fastest data transfer speed?
Trap 1: Bluetooth 5.0
Bluetooth 5.0 maxes out at about 2 Mbps, far too slow for large files.
Trap 2: Wi-Fi 5 (802.11ac)
Wi-Fi 5 can reach 1.3 Gbps in ideal conditions but is often slower and less reliable than wired USB-C.
Trap 3: NFC
NFC is for very short-range, low-speed data like contactless payments, not file transfers.
- A
Bluetooth 5.0
Why wrong: Bluetooth 5.0 maxes out at about 2 Mbps, far too slow for large files.
- B
Wi-Fi 5 (802.11ac)
Why wrong: Wi-Fi 5 can reach 1.3 Gbps in ideal conditions but is often slower and less reliable than wired USB-C.
- C
USB 3.1 Gen 2 over USB-C
USB 3.1 Gen 2 supports up to 10 Gbps, making it the fastest widely available wired connection for file transfers.
- D
NFC
Why wrong: NFC is for very short-range, low-speed data like contactless payments, not file transfers.
A technician is setting up a mobile point-of-sale system using a tablet and a portable receipt printer. The printer supports both Bluetooth and NFC. Which connection method should the technician use for reliable, low-latency printing?
Trap 1: NFC
NFC is for quick pairing or small data transfers, not for streaming print jobs reliably.
Trap 2: Infrared
Infrared requires line-of-sight and is outdated for modern printers.
Trap 3: Wi-Fi Direct
Wi-Fi Direct can work but is more complex to set up and may have higher latency than Bluetooth for this use case.
- A
NFC
Why wrong: NFC is for quick pairing or small data transfers, not for streaming print jobs reliably.
- B
Bluetooth
Bluetooth offers a reliable, low-latency connection for continuous printing over several meters.
- C
Infrared
Why wrong: Infrared requires line-of-sight and is outdated for modern printers.
- D
Wi-Fi Direct
Why wrong: Wi-Fi Direct can work but is more complex to set up and may have higher latency than Bluetooth for this use case.
A technician is configuring a mobile hotspot on a smartphone to provide internet access to a laptop. The laptop connects to the hotspot's Wi-Fi network but cannot access the internet. The smartphone has a cellular data connection. Which of the following should the technician check first?
Trap 1: The laptop's IP address configuration
IP configuration issues would prevent network access, but the laptop can connect to the hotspot, suggesting DHCP is working.
Trap 2: The laptop's firewall settings
Firewall settings might block certain traffic, but the first step is to ensure the hotspot itself has internet access.
Trap 3: The smartphone's Wi-Fi is turned on
Wi-Fi on the phone is used for the hotspot, but it's already broadcasting; the issue is internet access, not connectivity.
- A
The laptop's IP address configuration
Why wrong: IP configuration issues would prevent network access, but the laptop can connect to the hotspot, suggesting DHCP is working.
- B
The smartphone's mobile data is enabled
The hotspot uses the phone's cellular data; if mobile data is off, the hotspot has no internet to share.
- C
The laptop's firewall settings
Why wrong: Firewall settings might block certain traffic, but the first step is to ensure the hotspot itself has internet access.
- D
The smartphone's Wi-Fi is turned on
Why wrong: Wi-Fi on the phone is used for the hotspot, but it's already broadcasting; the issue is internet access, not connectivity.
A technician is troubleshooting a smartphone that cannot establish an NFC connection with a payment terminal. The phone's NFC is enabled, and the screen is unlocked. The payment terminal shows 'No card detected'. Which of the following should the technician check first?
Trap 1: The phone's battery level
Battery level does not affect NFC functionality as long as the phone is on.
Trap 2: The payment terminal's internet connection
NFC transactions can work offline; the terminal's internet is for authorization, not detection.
Trap 3: The phone's default payment app settings
App settings affect which card is used, but the terminal not detecting the phone at all points to a hardware or alignment issue.
- A
The phone's battery level
Why wrong: Battery level does not affect NFC functionality as long as the phone is on.
- B
The phone's NFC antenna location and alignment with the terminal
NFC has a very short range (about 4 cm) and requires the phone's NFC antenna to be near the terminal's reader; misalignment is a common issue.
- C
The payment terminal's internet connection
Why wrong: NFC transactions can work offline; the terminal's internet is for authorization, not detection.
- D
The phone's default payment app settings
Why wrong: App settings affect which card is used, but the terminal not detecting the phone at all points to a hardware or alignment issue.
A user reports that their laptop's Bluetooth mouse stops working after the laptop wakes from sleep. The mouse works fine after a reboot. The technician suspects a driver issue. Which of the following steps should the technician take to resolve this without disrupting other Bluetooth devices?
Trap 1: Uninstall the mouse driver and reboot.
This would remove the mouse driver entirely, requiring reinstallation and potentially affecting other devices.
Trap 2: Change the mouse's Bluetooth pairing to a different channel.
Bluetooth channels are managed automatically; manual channel selection is not a standard user setting.
Trap 3: Update the laptop's BIOS to the latest version.
BIOS updates can fix hardware compatibility, but this is a driver/software issue, not a BIOS problem.
- A
Uninstall the mouse driver and reboot.
Why wrong: This would remove the mouse driver entirely, requiring reinstallation and potentially affecting other devices.
- B
Disable and re-enable the Bluetooth adapter in Device Manager.
This resets the Bluetooth radio and stack, often fixing wake-from-sleep issues without affecting other devices.
- C
Change the mouse's Bluetooth pairing to a different channel.
Why wrong: Bluetooth channels are managed automatically; manual channel selection is not a standard user setting.
- D
Update the laptop's BIOS to the latest version.
Why wrong: BIOS updates can fix hardware compatibility, but this is a driver/software issue, not a BIOS problem.
A user wants to connect their laptop to a 4K TV for a movie marathon. They have a USB-C port on the laptop but the TV only has HDMI. Which accessory is required?
Trap 1: A USB-C to DisplayPort adapter.
DisplayPort is not compatible with HDMI without an active adapter, and the TV only has HDMI.
Trap 2: A USB-C to VGA adapter.
VGA is analog and does not support 4K resolution, and the TV lacks VGA input.
Trap 3: A USB-C to Ethernet adapter.
Ethernet is for network connectivity, not video output.
- A
A USB-C to DisplayPort adapter.
Why wrong: DisplayPort is not compatible with HDMI without an active adapter, and the TV only has HDMI.
- B
A USB-C to HDMI adapter.
This is correct; it converts the USB-C video signal to HDMI for the TV.
- C
A USB-C to VGA adapter.
Why wrong: VGA is analog and does not support 4K resolution, and the TV lacks VGA input.
- D
A USB-C to Ethernet adapter.
Why wrong: Ethernet is for network connectivity, not video output.
A user reports that their smartphone's wireless charging pad stops charging after a few minutes, and the phone gets very hot. The phone supports Qi wireless charging. The technician tests the pad with another phone and it works fine. What is the most likely cause?
Trap 1: The phone's battery management system is faulty.
A faulty battery management system could cause overheating, but the pad working with another phone points to an external factor like the case.
Trap 2: The phone's wireless charging coil is misaligned with the pad.
Misalignment would prevent charging from the start, not after a few minutes.
Trap 3: The wireless charging pad is not Qi-certified.
If the pad works with another phone, certification is not the issue; the problem is specific to this phone.
- A
The phone's battery management system is faulty.
Why wrong: A faulty battery management system could cause overheating, but the pad working with another phone points to an external factor like the case.
- B
The phone's wireless charging coil is misaligned with the pad.
Why wrong: Misalignment would prevent charging from the start, not after a few minutes.
- C
The phone case contains metal or magnetic components that interfere with charging.
This is correct; metal can cause eddy currents, leading to heat and charging interruption.
- D
The wireless charging pad is not Qi-certified.
Why wrong: If the pad works with another phone, certification is not the issue; the problem is specific to this phone.
A sales representative reports that their tablet's screen becomes unresponsive when they try to use it with a capacitive stylus. They need to annotate documents during client meetings. Which accessory should you recommend to resolve this issue?
Trap 1: A Bluetooth keyboard
A Bluetooth keyboard does not interact with the touchscreen and won't help with annotation tasks.
Trap 2: A screen protector
A screen protector may protect the screen but does not improve stylus responsiveness; it could even reduce sensitivity.
Trap 3: A passive stylus with a rubber tip
Passive rubber-tipped styluses often don't work well with capacitive screens because they lack conductivity, leading to unresponsive input.
- A
A Bluetooth keyboard
Why wrong: A Bluetooth keyboard does not interact with the touchscreen and won't help with annotation tasks.
- B
A fine-point capacitive stylus
A capacitive stylus is designed to work with capacitive touchscreens, providing the necessary conductive tip for accurate input.
- C
A screen protector
Why wrong: A screen protector may protect the screen but does not improve stylus responsiveness; it could even reduce sensitivity.
- D
A passive stylus with a rubber tip
Why wrong: Passive rubber-tipped styluses often don't work well with capacitive screens because they lack conductivity, leading to unresponsive input.
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