220-1201 Mobile Device Connection Methods — 20 Questions

Question 1

A company deploys tablets for field workers to capture signatures on glass screens using a capacitive stylus. Several workers complain that the stylus does not register consistently. What is the most likely cause?

Accepted Answer

The stylus tip is not conductive.. Capacitive touchscreens require a conductive stylus; standard plastic or non-conductive styli will not work. The correct solution is to use a stylus with a conductive tip designed for capacitive screens.

Answer

The screen protector is too thick.

Answer

The tablet's touch calibration is off.

Answer

The workers are pressing too lightly.

Question 2

A technician is configuring a conference room where a laptop must wirelessly display its screen to a 4K projector without using any cables. The projector supports Miracast. What must the technician verify on the laptop?

Accepted Answer

The laptop supports Miracast and Wi-Fi is enabled.. Miracast uses Wi-Fi Direct to mirror the screen; the laptop must support Miracast (common in Windows 8.1 and later) and have Wi-Fi enabled. It does not require an internet connection or Bluetooth.

Answer

The laptop has Bluetooth enabled.

Answer

The laptop is connected to the same Wi-Fi network as the projector.

Answer

The laptop has an HDMI port.

Question 3

A user's Android phone will not charge when plugged into a car's USB port, but charges fine with a wall adapter. The car's USB port powers other devices. What is the most likely issue?

Accepted Answer

The car USB port does not supply enough current.. Car USB ports often provide limited current (0.5A), which may be insufficient for fast charging or even maintaining charge on modern phones. The phone's charging circuit may require more current than the port supplies, so it does not charge.

Answer

The car's USB port is faulty.

Answer

The phone's USB port is damaged.

Answer

The USB cable is incompatible.

Question 4

A user reports that their new Bluetooth headset pairs with their smartphone but no audio is heard during calls. The headset works fine with another phone. What is the most likely cause?

Accepted Answer

The phone is not using the correct Bluetooth profile for calls.. Bluetooth audio requires correct profile support; the most common issue is the phone using the wrong audio profile (e.g., HSP for calls vs. A2DP for media). The headset may be connected but not set as the active audio device for calls.

Answer

The headset battery is low.

Answer

The headset is out of Bluetooth range.

Answer

The phone's Bluetooth radio is faulty.

Question 5

A user wants to connect their laptop to a 4K external monitor using a USB-C port that supports DisplayPort Alt Mode. The monitor has only HDMI input. Which adapter or cable is required?

Accepted Answer

USB-C to HDMI adapter. USB-C with DisplayPort Alt Mode outputs a DisplayPort signal; to connect to an HDMI monitor, a USB-C to HDMI adapter or cable is needed. A simple USB-C to USB-A adapter will not carry video.

Answer

USB-C to USB-A adapter

Answer

USB-C to DisplayPort cable

Answer

USB-C to VGA adapter

Question 6

A technician is setting up a mobile point-of-sale (POS) system using a tablet and a Bluetooth receipt printer. The printer pairs but prints garbled text. The tablet is running a custom POS app. What is the most likely cause?

Accepted Answer

The tablet is using the wrong Bluetooth profile or driver for the printer.. Bluetooth printers require the correct driver or profile (e.g., SPP or HCRP) to interpret data. Garbled text indicates the tablet is sending data in an unsupported format or the wrong driver is loaded. Installing the proper printer driver usually resolves this.

Answer

The printer is out of paper.

Answer

The Bluetooth signal is weak.

Answer

The printer's battery is low.

Question 7

A user's laptop has a USB-C port that supports Thunderbolt 3. They want to connect two 4K monitors daisy-chained. The monitors have DisplayPort inputs. Which cable configuration is required?

Accepted Answer

Use a USB-C to DisplayPort cable from the laptop to the first monitor, then a DisplayPort cable from the first monitor to the second.. Thunderbolt 3 supports daisy-chaining via DisplayPort over USB-C. Each monitor must have a DisplayPort input and support MST (Multi-Stream Transport). The first monitor connects to the laptop via USB-C to DisplayPort cable, and the second connects to the first monitor's DisplayPort out.

Answer

Connect both monitors directly to the laptop using two separate USB-C to HDMI cables.

Answer

Use a USB-C hub with two HDMI ports.

Answer

Use a single USB-C to DisplayPort cable that splits into two DisplayPort connectors.

Question 8

A user reports that their iPhone will not connect to a Bluetooth speaker that is in pairing mode. The speaker is listed in the iPhone's Bluetooth settings but tapping it does nothing. What should the technician try first?

Accepted Answer

Forget the speaker in Bluetooth settings and re-pair.. If a device is listed but won't connect, it may be a cached pairing record. Forgetting the device and re-pairing clears the old profile and allows a fresh connection. This is a standard troubleshooting step for Bluetooth issues.

Answer

Restart the iPhone.

Answer

Reset the network settings on the iPhone.

Answer

Update the speaker's firmware.

Question 9

A user reports that their NFC-enabled smartphone cannot make contactless payments at a terminal that works with other phones. The user has a thick wallet case with metal credit cards. What is the most likely issue?

Accepted Answer

The wallet case is interfering with the NFC signal.. NFC uses electromagnetic fields; metal objects can block or detune the NFC antenna. A thick case with metal cards can shield the phone's NFC antenna, preventing communication with the payment terminal. Removing the case or isolating the phone from metal usually resolves this.

Answer

The payment terminal's NFC reader is faulty.

Answer

The phone's NFC antenna is damaged.

Answer

The phone's payment app is not configured correctly.

Question 10

A technician is troubleshooting a smartwatch that will not sync with a smartphone via Bluetooth. The smartwatch pairs but data syncs only intermittently. The smartphone is an Android device with battery optimization enabled for the companion app. What is the most likely cause?

Accepted Answer

The smartphone's battery optimization is preventing the companion app from running in the background.. Battery optimization on Android can kill background processes for apps, preventing the companion app from maintaining a constant Bluetooth connection for syncing. Disabling battery optimization for the app allows it to run continuously, resolving intermittent sync issues.

Answer

The smartwatch firmware is outdated.

Answer

The Bluetooth radio is experiencing interference from other devices.

Answer

The smartwatch's battery is low.

Question 11

A technician is configuring a kiosk that uses a tablet to display digital signage. The tablet must be powered continuously and connected to a wired network for reliability. The tablet has a single USB-C port. How should the technician provide both power and network connectivity?

Accepted Answer

Connect a USB-C hub that provides both Ethernet and Power Delivery charging.. USB-C supports alternate modes and Power Delivery. A USB-C hub with Ethernet and power passthrough allows simultaneous charging and wired networking. This is a common solution for single-port tablets.

Answer

Use a USB-C to Ethernet adapter and charge the tablet wirelessly.

Answer

Use a Wi-Fi connection and a standard USB-C charger.

Answer

Connect the tablet to the network via Bluetooth tethering to a phone.

Question 12

A small office uses a wireless printer that supports Wi-Fi Direct. Several employees want to print from their smartphones without connecting to the company's wireless network. What is the simplest way to achieve this?

Accepted Answer

Use the printer's Wi-Fi Direct feature to connect each phone directly.. Wi-Fi Direct allows devices to connect directly without a network. The printer creates its own Wi-Fi network that phones can join to print. This avoids network congestion and security issues.

Answer

Connect the printer to the office router via Ethernet.

Answer

Enable the printer's Bluetooth and pair each phone.

Answer

Install a USB hub and connect all phones to the printer.

Question 13

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?

Accepted Answer

USB 3.1 Gen 2 over USB-C. USB 3.1/3.2 Gen 2 over USB-C supports up to 10 Gbps, faster than Wi-Fi 5 (802.11ac) or Bluetooth. Thunderbolt 3/4 is even faster but not always present; USB-C with proper standard is the best among common options.

Answer

Bluetooth 5.0

Answer

Wi-Fi 5 (802.11ac)

Answer

NFC

Question 14

A user wants to mirror their Android smartphone's screen to a smart TV that does not support Miracast. The TV has HDMI and USB ports. Which device should the technician recommend?

Accepted Answer

A Chromecast device. A Chromecast or similar streaming device plugs into HDMI and uses Wi-Fi to receive screen mirroring via Google Cast. Miracast is not supported by the TV, so an external device is needed.

Answer

A USB-C to HDMI cable

Answer

A Bluetooth transmitter

Answer

An NFC tag

Question 15

A user complains that their laptop's Wi-Fi connection drops frequently when a Bluetooth mouse is active. The laptop is a recent model with built-in Wi-Fi and Bluetooth. What is the most likely cause?

Accepted Answer

Interference between Bluetooth and Wi-Fi on the 2.4 GHz band.. Bluetooth and Wi-Fi (especially 2.4 GHz) share the same frequency band and can interfere. This is a common issue when both are active simultaneously, especially with older or poorly shielded hardware.

Answer

The Bluetooth mouse is out of range.

Answer

The laptop's Wi-Fi driver is outdated.

Answer

The Bluetooth mouse uses a proprietary frequency.

Question 16

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?

Accepted Answer

The smartphone does not support the required Bluetooth profile for call audio.. This scenario tests knowledge of Bluetooth profiles. The correct answer is that the smartphone may not support the Hands-Free Profile (HFP) or Headset Profile (HSP) required for call audio, even if the Advanced Audio Distribution Profile (A2DP) works for music. Bluetooth devices rely on specific profiles for different functions.

Answer

The headphones are out of battery.

Answer

The smartphone's Bluetooth antenna is damaged.

Answer

The headphones are paired to too many devices simultaneously.

Question 17

A technician is troubleshooting a laptop that cannot connect to a 5 GHz Wi-Fi network, but it connects to 2.4 GHz networks without issue. The laptop's Wi-Fi adapter supports both bands. What is the most likely cause?

Accepted Answer

The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal.. The 5 GHz band is more susceptible to obstruction and has shorter range. Physical barriers or distance can prevent the laptop from seeing or connecting to the 5 GHz network. Driver or channel issues are also possible but less common.

Answer

The 5 GHz network is using a channel not supported by the laptop's Wi-Fi adapter.

Answer

The laptop's Bluetooth is interfering with the 5 GHz Wi-Fi.

Answer

The 5 GHz network requires WPA3, which the laptop does not support.

Question 18

A user wants to connect their laptop to a 4K external monitor for a presentation. The laptop has USB-C ports, and the monitor supports HDMI and DisplayPort. Which adapter or cable should the technician recommend for the best video quality?

Accepted Answer

USB-C to DisplayPort cable. USB-C can carry DisplayPort signals natively, so a USB-C to DisplayPort cable supports 4K at high refresh rates without compression. HDMI may also work but depends on the laptop's alternate mode support.

Answer

USB-C to VGA adapter

Answer

USB-C to HDMI adapter

Answer

USB-C to DVI adapter

Question 19

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?

Accepted Answer

Bluetooth. Bluetooth provides a stable, moderate-range connection suitable for printing. NFC is for very short taps and not designed for continuous data streams. Bluetooth is the standard for such peripherals.

Answer

NFC

Answer

Infrared

Answer

Wi-Fi Direct

Question 20

A company deploys tablets for inventory management. The tablets need to connect to a Bluetooth barcode scanner and also sync data to a cloud server over Wi-Fi. The Bluetooth connection drops every few minutes. What is the most likely cause?

Accepted Answer

Wi-Fi and Bluetooth are interfering because both use the 2.4 GHz band.. Co-channel interference between Bluetooth and Wi-Fi on the 2.4 GHz band is a common issue. If the Wi-Fi network is heavily used, it can disrupt Bluetooth. Changing Wi-Fi to 5 GHz or using Bluetooth 5's enhanced features can help.

Answer

The barcode scanner's battery is low.

Answer

The tablets are too far from the barcode scanner.

Answer

The cloud server is not responding to sync requests.