220-1101 Mobile Device Connection Methods Practice Test 2 — 15 Questions

Question 1

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 2

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 3

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 4

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 5

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.

Question 6

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?

Accepted Answer

The smartphone's mobile data is enabled. Mobile hotspots require cellular data to be enabled; if data is off, the hotspot broadcasts a Wi-Fi signal but no internet passes through. This tests basic troubleshooting of hotspot functionality and the dependency on cellular data.

Answer

The laptop's IP address configuration

Answer

The laptop's firewall settings

Answer

The smartphone's Wi-Fi is turned on

Question 7

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?

Accepted Answer

The phone's NFC antenna location and alignment with the terminal. NFC requires close proximity and correct orientation; many phones have the NFC antenna located near the top or back. This tests practical knowledge of NFC hardware placement and the need for precise alignment.

Answer

The phone's battery level

Answer

The payment terminal's internet connection

Answer

The phone's default payment app settings

Question 8

A technician is deploying a fleet of tablets for field workers who need to print invoices on a Bluetooth printer. The tablets are Android-based and support Bluetooth 5.0. The printer is an older model supporting Bluetooth 2.1. Which of the following is true about the compatibility between these devices?

Accepted Answer

The tablet and printer will connect but only at Bluetooth 2.1 capabilities.. Bluetooth is backward compatible, so a Bluetooth 5.0 device can connect to a Bluetooth 2.1 device, but it will operate at the lower version's capabilities. This tests knowledge of Bluetooth version compatibility and that features like range and speed are limited by the older device.

Answer

The tablet will not be able to pair with the printer due to version mismatch.

Answer

The connection will operate at Bluetooth 5.0 speeds and range.

Answer

The printer must be upgraded to Bluetooth 4.0 to work with the tablet.

Question 9

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?

Accepted Answer

Disable and re-enable the Bluetooth adapter in Device Manager.. Disabling and re-enabling the Bluetooth adapter in Device Manager resets the Bluetooth stack without a full reboot, often restoring functionality after sleep. This tests advanced troubleshooting of Bluetooth power management issues.

Answer

Uninstall the mouse driver and reboot.

Answer

Change the mouse's Bluetooth pairing to a different channel.

Answer

Update the laptop's BIOS to the latest version.

Question 10

A user's laptop frequently disconnects from a 5 GHz Wi-Fi network when they move to a room two walls away from the access point. The 2.4 GHz network remains stable throughout the office. Which of the following best explains this behavior?

Accepted Answer

The 5 GHz signal has weaker penetration through walls.. The 5 GHz band offers higher speeds but shorter range and poorer penetration through walls compared to 2.4 GHz. This tests understanding of the trade-offs between Wi-Fi frequency bands in real-world environments.

Answer

The 5 GHz network is overloaded with users.

Answer

The laptop's Wi-Fi adapter is faulty.

Answer

The access point is configured to prioritize 2.4 GHz traffic.

Question 11

A user is trying to connect their smartphone to a car's infotainment system using Bluetooth for hands-free calling. The phone pairs successfully, but audio only plays through the phone's speaker, not the car's speakers. Which of the following is the most likely reason for this issue?

Accepted Answer

The phone is only connected for phone calls (HFP) and not for media audio (A2DP).. Bluetooth profiles define functionality; the Handsfree Profile (HFP) is used for calls, while A2DP is for media audio. If A2DP is not connected, media audio may route to the phone. This tests knowledge of Bluetooth profiles and their roles in audio routing.

Answer

The car's Bluetooth system does not support the phone's Bluetooth version.

Answer

The car's speakers are defective.

Answer

The phone's audio output is set to 'Speaker' in the call app.

Question 12

A technician is setting up a conference room where a laptop must connect to a large display for presentations. The display supports HDMI, DisplayPort, and USB-C. The laptop only has a USB-C port that supports DisplayPort Alt Mode. Which cable should the technician use to connect the laptop to the display?

Accepted Answer

USB-C to HDMI cable. USB-C with DisplayPort Alt Mode can transmit video signals directly, so a USB-C to HDMI cable is the simplest solution. HDMI is commonly supported on displays, and this avoids needing adapters. This tests knowledge of USB-C Alt Mode capabilities for video output.

Answer

USB-C to USB-C cable

Answer

USB-C to DisplayPort cable

Answer

USB-C to VGA cable

Question 13

A user reports that their wireless earbuds produce choppy audio when they walk to the other side of their office, but work fine when near the phone. The office has many metal filing cabinets and concrete walls. Which of the following is the most likely cause of the audio degradation?

Accepted Answer

Physical obstructions are blocking the Bluetooth signal.. Bluetooth signals are susceptible to physical obstructions like metal and concrete, which can cause signal attenuation and packet loss. This tests understanding of environmental factors affecting wireless range and performance.

Answer

The earbuds' battery is low.

Answer

The phone's Bluetooth antenna is weak.

Answer

There is interference from a nearby microwave oven.

Question 14

A technician is configuring a kiosk tablet that must connect to a wired Ethernet network for security reasons. The tablet only has a USB-C port. The network drop provides an RJ45 connection. Which of the following should the technician use to achieve a wired connection?

Accepted Answer

USB-C to Ethernet adapter. USB-C to Ethernet adapters are standard and allow wired network connections on devices without Ethernet ports. This tests knowledge of adapter types and the ability to select the correct one for a given port and network interface.

Answer

USB-C to HDMI adapter

Answer

USB-C to USB-A adapter with a USB Ethernet dongle

Answer

USB-C to DisplayPort adapter

Question 15

A customer reports that their Bluetooth keyboard intermittently disconnects from their tablet while typing. The tablet and keyboard are less than a meter apart, and no other Bluetooth devices are nearby. Which of the following is the most likely cause of the disconnection?

Accepted Answer

The user's body is blocking the Bluetooth signal when typing.. Bluetooth connections can be disrupted by physical obstructions, even at short distances. The human body, especially when positioned between the keyboard and tablet, can absorb or block the radio signal. This scenario tests understanding that line-of-sight and physical barriers affect Bluetooth range and stability.

Answer

The tablet's Bluetooth adapter is defective.

Answer

The keyboard's battery is low.

Answer

There is interference from a nearby Wi-Fi network.