220-1201 Practice Test 2 — 10 Questions

Question 1

A customer brings in a smartphone with a cracked glass digitizer that still responds to touch, but the LCD underneath is intact. They want the cheapest repair that restores full functionality. Which component should you replace?

Accepted Answer

Replace only the digitizer.. This question tests knowledge of mobile device component layers and repair options. The digitizer is the touch-sensitive layer; if it's cracked but the LCD is fine, replacing just the digitizer is the most cost-effective solution. Replacing the entire screen assembly would be more expensive and unnecessary.

Answer

Replace the entire screen assembly (LCD + digitizer).

Answer

Replace only the LCD panel.

Answer

Apply a glass screen protector and ignore the crack.

Question 2

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?

Accepted Answer

The battery management system (BMS) is faulty.. This question covers battery charging circuitry. The battery management system (BMS) controls charging and communicates with the laptop. If the BMS fails, the battery may not accept a charge even if cells are good. The AC adapter is verified working, so the issue is inside the battery.

Answer

The lithium-ion cells have degraded.

Answer

The DC jack on the laptop is loose.

Answer

The laptop's motherboard charging circuit is damaged.

Question 3

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?

Accepted Answer

Charge each tablet to at least 50% and apply all system updates.. This question tests understanding of device preparation for deployment. Before any software configuration, you must ensure the device has a full charge and is updated to avoid interruptions. Kiosk mode is set via software after the device is ready.

Answer

Install a screen protector on each tablet.

Answer

Remove the SIM card from each tablet.

Answer

Replace the stock ROM with a custom firmware.

Question 4

A technician is troubleshooting a tablet that has a dim display that flickers intermittently. The device responds to touch and the OS loads normally. Which component is most likely failing?

Accepted Answer

The backlight LED or inverter is failing.. This question differentiates between LCD and backlight failures. A dim, flickering display with normal touch and OS function points to a backlight issue, often caused by a failing LED driver or inverter. The LCD panel itself may be fine.

Answer

The digitizer is malfunctioning.

Answer

The LCD panel has dead pixels.

Answer

The motherboard GPU is damaged.

Question 5

During a repair, you accidentally dislodged a small ribbon cable connecting the volume button flex to the mainboard of a smartphone. Now the volume buttons don't work. What is the most likely result of this mistake?

Accepted Answer

The volume buttons become unresponsive.. This question tests knowledge of flex cable connections. The volume button flex cable is a separate component that connects to the mainboard via a ZIF or latch connector. If dislodged, the buttons lose electrical connection and become non-functional, but other features remain unaffected.

Answer

The phone won't power on.

Answer

The touchscreen becomes unresponsive.

Answer

The speaker stops producing sound.

Question 6

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?

Accepted Answer

Replace the battery with a new OEM battery.. This question tests battery replacement thresholds. A battery health below 80-85% often indicates significant degradation, causing poor runtime. Replacing the battery restores normal battery life. Software optimization may help but is secondary to hardware replacement.

Answer

Calibrate the battery by fully draining and recharging.

Answer

Update the operating system to the latest version.

Answer

Disable all background apps and notifications.

Question 7

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?

Accepted Answer

Reseat the touchpad ribbon cable on the motherboard.. This question tests systematic troubleshooting of input devices. After ruling out software and debris, the next step is to check the touchpad's ribbon cable connection to the motherboard. A loose or damaged cable can cause erratic behavior. Replacing the touchpad itself is a later step.

Answer

Replace the entire keyboard assembly.

Answer

Replace the laptop's LCD screen.

Answer

Reinstall the operating system.

Question 8

A technician is servicing a smartphone with a non-functional earpiece speaker during calls, but the loudspeaker works fine. After testing, the earpiece speaker itself is determined to be good. Which component is most likely faulty?

Accepted Answer

The mainboard audio IC (codec).. This question tests understanding of audio routing in mobile devices. The audio IC or codec manages which speaker is used. If the earpiece speaker is good but doesn't work, the audio IC may be damaged, or the connection traces are broken. The loudspeaker working suggests the audio path for that output is intact.

Answer

The charging port flex cable.

Answer

The SIM card slot.

Answer

The battery connector.

Question 9

A user reports that their tablet's screen is completely black but the device vibrates when powered on. You have already tried a forced restart and checked for physical damage. What is the most likely hardware cause?

Accepted Answer

The LCD panel or display ribbon cable is faulty.. This question tests diagnosis of a no-display condition with power-on indication. Vibration confirms the device is booting, so the issue is likely with the display assembly or its connection. A failed LCD panel or a loose display cable is the most probable cause, as the backlight or digitizer failure would still show some light or touch response.

Answer

The battery is completely drained.

Answer

The digitizer is cracked.

Answer

The OS is corrupted.

Question 10

A laptop's built-in webcam is not recognized by any application. You have checked Device Manager and the camera is not listed. The webcam ribbon cable appears intact. Which component should you suspect next?

Accepted Answer

The webcam module or motherboard USB controller has failed.. This question tests knowledge of internal USB device enumeration. The webcam is typically connected via an internal USB header on the motherboard. If the camera is not detected at all, the motherboard's USB controller or the camera module itself may be faulty. A loose cable would cause intermittent detection, but the cable is intact.

Answer

The webcam driver is outdated.

Answer

The laptop's BIOS has the webcam disabled.

Answer

The operating system needs to be reinstalled.