220-1101 Practice Test 19 — 15 Questions

Question 1

A user reports that their iPhone is not recognized by a Windows computer when connected via USB. The user has tried three different USB cables, all of which allow the phone to charge normally. The user also tested another iPhone with the same computer and it was recognized. The iPhone's 'Trust This Computer' prompt appeared and was accepted. Which of the following is the MOST likely cause of the issue?

Accepted Answer

The Lightning port on the iPhone has damaged data pins.. The fact that the iPhone charges normally but is not recognized by the computer indicates that the power pins in the Lightning connector are functioning, but the data pins are damaged or obstructed. Since another iPhone is recognized on the same computer, the issue is isolated to the original iPhone's Lightning port. The 'Trust This Computer' prompt appearing and being accepted confirms that the software trust relationship is not the problem, further pointing to a hardware data pin failure.

Answer

The iPhone's battery needs to be replaced.

Answer

The iPhone's operating system is corrupt.

Answer

The iPhone's display assembly is malfunctioning.

Question 2

A user reports that their desktop computer is experiencing very slow network performance. The technician runs a speed test and gets only 10 Mbps download speed, while other devices on the same network achieve 500 Mbps. The technician checks the network adapter settings in the operating system and sees that 'Speed & Duplex' is manually set to '10 Mbps Half Duplex'. Which of the following should the technician do to resolve this issue?

Accepted Answer

Change the Speed & Duplex setting to 'Auto-Negotiation'. The issue is that the network adapter is manually locked to '10 Mbps Half Duplex', which forces a 10 Mbps connection even though the network infrastructure supports much higher speeds. Changing the setting to 'Auto-Negotiation' allows the adapter to automatically negotiate the highest mutually supported speed and duplex mode with the switch or router, restoring the expected 500 Mbps throughput.

Answer

Replace the Ethernet cable with a Cat5e cable

Answer

Update the network adapter driver

Answer

Disable and re-enable the network adapter

Question 3

A user reports that their iPhone displays 'No SIM' even though the SIM card is properly inserted. The technician has already removed and reinserted the SIM, and performed a restart. Which of the following should the technician do NEXT to isolate the issue?

Accepted Answer

Try the SIM card in another compatible phone.. The technician has already performed basic troubleshooting (reseating the SIM and restarting the device). The next logical step is to test the SIM card in another compatible phone to determine whether the issue lies with the SIM card itself or with the iPhone's SIM reader/baseband. This isolates the fault domain before proceeding with more invasive or irreversible steps.

Answer

Reset network settings.

Answer

Check for a carrier settings update.

Answer

Replace the SIM card with a new one.

Question 4

A user reports that their iPhone's battery drains quickly throughout the day. The technician checks the Battery settings and sees that the display is the top consumer at 40%. The user mentions the screen is very bright outdoors. Which of the following settings would MOST effectively reduce battery drain in this scenario?

Accepted Answer

Enable Auto-Brightness.. Enabling Auto-Brightness allows the phone to adjust screen brightness based on ambient light, reducing power consumption when full brightness is not needed. This directly addresses the high display battery usage.

Answer

Turn off Bluetooth.

Answer

Disable Background App Refresh.

Answer

Reduce the screen resolution.

Question 5

A user reports that their desktop computer loses network connectivity for a few seconds every time they operate a large power tool (e.g., an electric saw) in the same room. The technician has already replaced the Ethernet cable, tested the switch port with another device (which works fine), and updated the NIC driver. Which of the following is the MOST likely cause of the intermittent disconnects?

Accepted Answer

Electromagnetic interference (EMI) from the power tool affecting the Ethernet cable. The large power tool generates significant electromagnetic interference (EMI) when operating, which can induce noise in the unshielded Ethernet cable, causing temporary signal degradation and loss of link. Since the technician has already ruled out the cable, switch port, and NIC driver, EMI from the tool is the most likely remaining cause.

Answer

Radio frequency interference (RFI) from the power tool's motor

Answer

An IP address conflict with the power tool's network interface

Answer

The DHCP lease is being forced to renew due to the power tool's operation

Question 6

A user reports that their desktop computer shuts down unexpectedly after about 10 minutes of use. The computer can be turned back on immediately after shutdown, and no error messages are displayed. The technician suspects the CPU is overheating. Which of the following steps should the technician take FIRST to confirm this suspicion?

Accepted Answer

Enter the system BIOS/UEFI and check the temperature monitor.. The technician should first enter the system BIOS/UEFI to check the CPU temperature monitor. This is the quickest, non-invasive step to confirm if the CPU is overheating, as the BIOS/UEFI provides real-time temperature readings without requiring hardware disassembly. If the temperature is abnormally high (e.g., above 90°C at idle or under load), it confirms the overheating suspicion.

Answer

Replace the thermal paste on the CPU.

Answer

Remove the CPU cooler and inspect the fan.

Answer

Update the system firmware.

Question 7

A user reports that their desktop computer shuts down randomly after about 15 minutes of use. A technician checks the event log and finds a critical error related to a thermal event. The technician has verified that the CPU heatsink fan and all case fans are spinning, and the heatsink is securely attached. However, the computer still shuts down. Which of the following should the technician do NEXT?

Accepted Answer

Check the CPU thermal paste application.. The technician has already verified that the CPU heatsink fan and case fans are spinning and the heatsink is securely attached, which rules out a loose cooler or a failed fan. The critical thermal event error indicates the CPU is overheating despite these checks, so the most likely remaining cause is degraded or improperly applied thermal paste, which prevents efficient heat transfer from the CPU die to the heatsink. Reapplying high-quality thermal paste is the standard next step before considering component replacement.

Answer

Replace the power supply unit.

Answer

Update the BIOS firmware.

Answer

Replace the CPU.

Question 8

A user reports that their iPhone 12 is not receiving incoming phone calls from unknown numbers. When an unknown number calls, it goes straight to voicemail after one ring. Known contacts in the user's address book ring normally. The user confirms Do Not Disturb is off. Which of the following is the MOST likely cause?

Accepted Answer

The phone has 'Silence Unknown Callers' enabled.. iOS includes a feature called 'Silence Unknown Callers' that automatically sends calls from unknown numbers to voicemail without ringing. This feature is separate from Do Not Disturb and is designed to reduce spam calls. It also affects legitimate unknown callers. Checking this setting is the first step.

Answer

The phone's SIM card is faulty.

Answer

The phone is in Low Power Mode.

Answer

The phone's software needs to be updated.

Question 9

A user reports that their iPhone's battery drains quickly while the phone is idle. The technician checks the Battery settings and sees that the 'Find My' app is using significant background activity. Which of the following is the MOST effective way to reduce battery drain from this app?

Accepted Answer

Disable Background App Refresh for Find My. Background App Refresh allows apps to check for updates and fetch data in the background. Disabling it for a specific app prevents that app from using power for background tasks. While disabling Location Services might also help, the reported issue is specifically background activity, so disabling Background App Refresh directly addresses the problem.

Answer

Turn off Location Services for Find My

Answer

Enable Low Power Mode

Answer

Turn off Bluetooth

Question 10

A user reports that their desktop computer loses network connectivity every few minutes, especially when the nearby overhead fluorescent lights are turned on. The technician observes that the link light on the NIC occasionally turns off during these events. The Ethernet cable is a Cat5e unshielded twisted pair (UTP) cable routed through the ceiling near the light fixtures. Which of the following is the MOST likely cause of the intermittent connectivity?

Accepted Answer

Electromagnetic interference (EMI) from the fluorescent lights is affecting the unshielded cable. The correct answer is C because unshielded twisted pair (UTP) cables lack shielding against electromagnetic interference (EMI). Fluorescent lights, especially older magnetic-ballast fixtures, generate strong EMI that can induce noise in nearby UTP cables, corrupting data signals and causing the NIC's link light to drop. This explains the correlation between the lights turning on and the loss of connectivity.

Answer

The network interface card (NIC) is faulty and needs replacement

Answer

The switch port is configured with an incorrect VLAN assignment

Answer

The DHCP server has exhausted its IP address scope

Question 11

A user reports that their desktop computer powers on but the monitor shows no display. The technician has already verified the monitor works with another computer, the video cable is securely connected, and the computer's internal fans spin. The computer has a dedicated graphics card and the monitor is connected to the motherboard's video port. Which of the following should the technician do NEXT?

Accepted Answer

Connect the monitor to the dedicated graphics card's port.. The monitor is connected to the motherboard's video port, but the system has a dedicated graphics card. When a dedicated GPU is installed, the motherboard's integrated graphics port is typically disabled by the BIOS/UEFI. Connecting the monitor to the dedicated graphics card's port will likely restore display output, as the GPU is the active video source.

Answer

Replace the graphics card.

Answer

Reseat the RAM modules.

Answer

Update the graphics drivers.

Question 12

A user reports that their desktop computer loses network connectivity for several seconds whenever they open a large file transfer program. The technician checks the NIC properties and sees that the link speed is 100 Mbps, but the switch port is configured for 1000 Mbps (full duplex). The cable is a Cat5e cable that runs through the ceiling. Other computers in the same office have gigabit connections to the same switch. Which of the following is the MOST likely cause of the intermittent connectivity?

Accepted Answer

The Ethernet cable is damaged or has excessive length, causing the NIC to negotiate a lower speed.. The most likely cause is a damaged or excessively long Cat5e cable. While Cat5e supports gigabit speeds up to 100 meters, a physical fault or excessive length can cause the NIC to fall back to 100 Mbps. When the large file transfer program generates high traffic, the marginal cable may introduce errors or signal degradation, causing temporary link drops. The fact that other computers have gigabit connections to the same switch rules out a switch configuration issue.

Answer

The switch port has a duplex mismatch.

Answer

The file transfer program is using an incompatible protocol.

Answer

The NIC driver is outdated and not compatible with gigabit.

Question 13

A user reports that their iPhone 12 will not vibrate when receiving incoming calls or text messages. The user has already checked the physical side switch (silent/ringer) and ensured it is not set to silent. The ringer volume is turned up. Which of the following should the user check NEXT to resolve the issue?

Accepted Answer

Check the 'Vibrate on Ring' setting in Sounds & Haptics. The iPhone 12 uses a dedicated 'Vibrate on Ring' toggle within Settings > Sounds & Haptics to control vibration for incoming calls and texts. Since the user has already verified the physical side switch is not set to silent and the ringer volume is up, the next logical step is to check this software setting, as it can be independently disabled even when the ringer is active.

Answer

Enable Do Not Disturb mode to ensure no interruptions are blocked

Answer

Perform a 'Reset All Settings' from the Settings app

Answer

Check the Bluetooth settings to ensure no external device is playing sounds

Question 14

A user reports that their laptop can see the company's Wi-Fi SSID but cannot connect to the network. Other users in the same area can connect without issues. The technician verifies that the laptop's wireless adapter is enabled and that the wireless security key is correct. Which of the following should the technician check NEXT?

Accepted Answer

MAC filtering settings on the wireless router. Since other users can connect to the same SSID, the DHCP server and wireless channel are not the issue. The laptop can see the SSID and the security key is correct, so authentication is passing, but association is failing. MAC filtering blocks the laptop's MAC address at Layer 2, preventing it from obtaining an IP address even with correct credentials.

Answer

The DHCP server to ensure IP addresses are available

Answer

The DNS server configuration on the laptop

Answer

Wireless channel interference from other devices

Question 15

A user reports that their laptop's Wi-Fi connection is unreliable and frequently drops. A technician checks Device Manager on the laptop and sees that the wireless adapter is listed with a yellow exclamation mark. Which of the following should the technician do FIRST?

Accepted Answer

Update the wireless adapter driver.. The yellow exclamation mark in Device Manager indicates a driver problem, such as a corrupted, missing, or incompatible driver. Updating the wireless adapter driver is the first logical step because it directly addresses the most common cause of this specific error, restoring proper communication between the OS and the hardware.

Answer

Replace the wireless adapter.

Answer

Disable and re-enable the wireless adapter.

Answer

Check the Wi-Fi antenna connections.