220-1101 Practice Test 18 — 15 Questions

Question 1

A user reports that their Android smartphone's screen is cracked in the lower-left corner. The touch input in that area is unresponsive, but the display works correctly and the rest of the touchscreen functions normally. Which of the following is the BEST repair option?

Accepted Answer

C. Replace the entire screen assembly (LCD and digitizer combined). The correct answer is C because in modern smartphones, the digitizer (touch layer) and LCD panel are fused together into a single screen assembly. When the glass is cracked and touch input is lost in a specific area, the digitizer is damaged, but separating it from the LCD is impractical and risks further damage. Replacing the entire screen assembly ensures both the display and touch functionality are restored reliably.

Answer

A. Replace only the digitizer (touch layer)

Answer

B. Replace only the LCD panel

Answer

D. Apply a tempered glass screen protector

Question 2

A user reports that their Android smartphone's battery drains extremely quickly, and the phone frequently feels warm even when not in use. The technician checks the battery health and it shows 'Good'. The technician notices that the phone's GPS icon appears intermittently in the status bar even when location services are turned off in the settings. Which of the following is the MOST likely cause?

Accepted Answer

A third-party app is requesting location data and keeping the GPS radio active.. The GPS icon appearing intermittently in the status bar, even when location services are disabled in the system settings, strongly indicates that a third-party app is independently requesting location data and keeping the GPS radio active. Android's location service architecture allows apps to request location updates via the Fused Location Provider API, which can bypass the master location toggle if the app has been granted location permissions before the toggle was turned off. This causes the GPS hardware to remain powered on, draining the battery and generating heat, despite the battery health showing 'Good'.

Answer

A malfunctioning battery management IC is overcharging the battery.

Answer

The phone's operating system has a bug that prevents the GPS from turning off.

Answer

The GPS antenna is shorted, causing constant power draw.

Question 3

A user reports that their Android smartphone's battery drains very quickly since a recent app update. The phone is running the latest OS version. The user closes all apps from the app switcher, but the battery continues to drain. Which of the following should the technician advise the user to check FIRST?

Accepted Answer

The app's background activity and location permissions. After an app update, the most likely cause of excessive battery drain is that the app is using background services, such as location, syncing, or other tasks. Closing apps from the app switcher may not fully stop background processes. The user should check the app's permissions and battery usage settings to revoke unnecessary background activity or force stop the app.

Answer

The screen brightness settings

Answer

The battery calibration

Answer

The Wi-Fi and Bluetooth settings

Question 4

A user reports that their Android smartphone's screen does not rotate when the device is turned sideways. The auto-rotate setting is enabled. Which of the following is the MOST likely cause?

Accepted Answer

The accelerometer sensor is faulty.. The accelerometer sensor is responsible for detecting the orientation of the device by measuring linear acceleration along the x, y, and z axes. When auto-rotate is enabled but the screen fails to rotate, a faulty accelerometer is the most likely cause because the operating system relies on this sensor to determine when to switch between portrait and landscape modes.

Answer

The gyroscope sensor is faulty.

Answer

The magnetometer sensor is faulty.

Answer

The proximity sensor is faulty.

Question 5

A user's smartphone is unable to make or receive calls. The device shows full signal bars but when attempting to place a call, it immediately ends. The technician checks airplane mode and it is off. Which of the following should the technician check FIRST?

Accepted Answer

Check the SIM card.. Full signal bars indicate the device is connected to the cellular network at the RF level, but an immediate call failure suggests the device cannot register with the network for voice services. The SIM card contains the IMSI and authentication keys (Ki) required for network registration; if it is loose, damaged, or not properly seated, the phone will show signal bars from the base station but fail to complete call setup because the network rejects the unauthenticated device.

Answer

Reboot the phone.

Answer

Check the Bluetooth settings.

Answer

Check the Wi-Fi calling settings.

Question 6

A user reports that after a power outage and router restart, their desktop computer can no longer access network shares on other computers. The user can access the internet. The technician runs ipconfig and sees the IP address changed from 192.168.1.50 to 192.168.1.75. The other computers on the network have static IP addresses. Which of the following should the technician configure to resolve the issue permanently?

Accepted Answer

Configure a DHCP reservation on the router for the user's computer.. The user's IP address changed from 192.168.1.50 to 192.168.1.75 after the router restart, indicating the computer received a new DHCP lease. Since other computers use static IPs, the user's computer likely had a static IP before the outage but reverted to DHCP after the restart, or it was always using DHCP and the router assigned a different address. Configuring a DHCP reservation on the router ensures the router always assigns the same IP (192.168.1.50) to the user's MAC address, permanently resolving the connectivity issue to network shares without changing the computer's configuration.

Answer

Configure a static IP address on the user's computer.

Answer

Set a shorter DHCP lease time on the router.

Answer

Change the subnet mask to 255.255.0.0.

Question 7

A user reports that their Android smartphone will not charge when placed on a wireless charging pad. The phone charges normally when connected via a USB cable. The technician tests the wireless charging pad with another smartphone, and it works fine. Which of the following is the MOST likely cause of the issue?

Accepted Answer

The phone case is interfering with the wireless charging. Option C is correct because a thick, metallic, or improperly designed phone case can block or interfere with the electromagnetic field used for inductive charging. Since the charging pad works with another phone and the phone charges via USB, the issue is specific to the phone's ability to receive the wireless signal, and the case is the most common physical barrier.

Answer

The wireless charging coil inside the phone has failed

Answer

The phone is not placed correctly on the charging pad

Answer

A software setting is disabling wireless charging

Question 8

A user reports that their Android smartphone's volume rocker button is physically stuck in the pressed position. The phone is still functioning, but the volume constantly decreases to zero and cannot be adjusted. Which of the following is the BEST first step?

Accepted Answer

Remove the phone case and clean around the button with compressed air. A stuck physical button on a smartphone is often caused by debris, such as dust or lint, lodged around the button, or by a case that is pressing against it. The best first step is to remove any case and gently clean around the button with compressed air. Factory reset and firmware reflash are software solutions that cannot fix a physical obstruction. Replacing the display assembly is unnecessary and costly for a button issue.

Answer

Perform a factory reset

Answer

Replace the display assembly

Answer

Reflash the firmware

Question 9

A user reports that their desktop computer emits a series of long beeps when powered on, and the screen remains blank. The technician reseats the RAM modules and the video card, but the problem persists. The motherboard has four RAM slots, and two modules are installed in slots A1 and A2. Which of the following should the technician do NEXT?

Accepted Answer

Install the RAM modules in slots A2 and B2 for dual-channel configuration.. The series of long beeps typically indicates a memory-related POST failure. Since reseating the RAM did not resolve the issue, the next logical step is to verify the correct slot configuration. Installing the modules in slots A2 and B2 (or A1 and B1) enables dual-channel mode, which is often required for proper memory initialization on many motherboards; using adjacent slots in the same channel (A1 and A2) can cause instability or failure to POST.

Answer

Replace the power supply unit.

Answer

Verify the monitor cable is securely connected.

Answer

Update the motherboard BIOS.

Question 10

A user reports that their Android smartphone's touchscreen is unresponsive. The user performed a factory reset, but the problem persists. The technician notices that the screen has several deep scratches but no cracks. Which of the following is the MOST likely cause?

Accepted Answer

Failed digitizer. The digitizer is the component responsible for detecting touch input on a smartphone screen. Deep scratches can physically damage the digitizer's conductive layer, causing unresponsiveness even though the display (LCD) itself may still function. A factory reset cannot repair physical damage, so the problem persists, confirming a hardware failure in the digitizer.

Answer

Corrupted firmware

Answer

Dead pixels

Answer

Damaged LCD

Question 11

A user reports that their Android smartphone's touchscreen is unresponsive in a narrow vertical strip near the left edge of the display. The rest of the screen responds normally to touch. The phone has not been dropped or exposed to moisture, and it functions otherwise normally. Which of the following is the MOST likely cause of this issue?

Accepted Answer

Digitizer malfunction. The touchscreen digitizer is the layer responsible for detecting touch input. A narrow vertical strip of unresponsiveness, without any physical damage or other display issues, is a classic symptom of a failing or damaged digitizer, not the LCD panel. The LCD panel only handles image display, which is reported as normal.

Answer

LCD panel damage

Answer

Software calibration issue

Answer

Battery swelling

Question 12

A user reports that their desktop computer loses network connection intermittently. The technician notices that the LED on the NIC is off but other computers on the same switch work fine. The cable run is long, passing through a ceiling. Which tool should the technician use FIRST?

Accepted Answer

Cable tester. The intermittent loss of connection and the NIC LED being off strongly suggest a physical layer issue with the cable. Since other computers on the same switch work fine, the problem is isolated to this specific cable run, which is long and passes through a ceiling where it could be damaged or pinched. A cable tester is the correct first tool because it can quickly verify continuity, wiring faults, and signal integrity without requiring the network to be active, allowing the technician to isolate the fault before moving to more complex diagnostics.

Answer

Loopback plug

Answer

Multimeter

Answer

Tone generator

Question 13

A user reports that their desktop computer intermittently loses network connectivity. The computer uses a USB Wi-Fi adapter. The technician notices that the adapter feels warm during use and the connection drops most often when the computer has been running for a while. Other devices on the same wireless network work fine. Which of the following is the MOST likely cause of the issue?

Accepted Answer

The USB port not providing enough power. The USB Wi-Fi adapter feels warm and drops connectivity after prolonged use, which indicates thermal stress from insufficient power delivery. USB ports have a maximum current output (typically 500mA for USB 2.0 or 900mA for USB 3.0), and if the adapter draws more power than the port can supply, the voltage drops, causing the adapter to overheat and disconnect. Other devices on the same network work fine, ruling out wireless interference or network-side issues, and the intermittent nature tied to runtime points directly to power starvation rather than a driver or cable fault.

Answer

Wireless interference from nearby devices

Answer

A faulty USB cable connected to the adapter

Answer

A driver conflict with the Wi-Fi adapter

Question 14

A user reports that their smartphone's screen appears to be slightly bulging outward and the back cover is separating from the chassis. The phone still powers on and functions normally. Which of the following components is MOST likely causing this issue?

Accepted Answer

Battery. A bulging screen and separating back cover are classic signs of a swollen lithium-ion battery. As the battery degrades, internal chemical reactions produce gas, causing the battery casing to swell and physically push against the phone's chassis. This occurs even if the phone still powers on and functions normally, as the battery can still deliver voltage while its physical integrity is compromised.

Answer

Digitizer

Answer

LCD panel

Answer

Charging port

Question 15

A user reports that their desktop computer's monitor displays a 'No Signal' message. The computer's power LED is lit, and all fans are spinning. The technician has verified that the monitor power is on and that the HDMI cable is securely connected to both the monitor and the computer. The technician also tried a different monitor, which also shows 'No Signal'. Which of the following should the technician do NEXT?

Accepted Answer

Reseat the RAM. The 'No Signal' message with both monitors failing indicates the issue is likely with the computer's POST (Power-On Self-Test) process. Since the power LED is on and fans spin, the PSU is delivering power, but the system may be failing to initialize memory, preventing video output. Reseating the RAM is a quick, non-invasive step to ensure proper contact with the motherboard slot, as loose or misaligned RAM is a common cause of POST failure that results in no video signal.

Answer

Replace the graphics card

Answer

Check if the monitor input source is set correctly

Answer

Boot into Safe Mode