220-1201 Practice Question: That their laptop's touchpad is not working after…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  The touchpad driver has been corrupted by the liquid

  Why it's wrong here

  Liquid primarily causes electrical shorts, corrosion, or physical damage to hardware components. Software, such as drivers, resides on storage devices (e.g., SSD/HDD) and is not directly affected by liquid unless the storage medium itself is physically damaged, which is a less common and indirect consequence of a spill. Driver corruption is typically caused by software conflicts, improper shutdowns, or malware, not direct liquid exposure.

• ✗

  The touchpad has been disabled in the BIOS due to a safety feature

  Why it's wrong here

  Standard laptop BIOS/UEFI firmware does not incorporate liquid detection sensors or safety features designed to automatically disable input devices like touchpads in response to a spill. While BIOS allows for manual enabling/disabling of integrated peripherals, there is no automatic mechanism to detect liquid and subsequently disable hardware components as a protective measure. Such advanced environmental sensing is not a common function of consumer-grade firmware.

• ✓

  The liquid has damaged the touchpad or its ribbon cable

  Why this is correct

  Liquid spills are highly likely to cause direct physical and electrical damage to sensitive electronic components. For a touchpad, this can involve short-circuiting the capacitive sensor array, corroding the delicate traces on the flexible ribbon cable, or damaging the connector where the cable attaches to the motherboard. Such damage disrupts the electrical signals required for the touchpad's functionality, leading to its failure while other, potentially unaffected components like the keyboard, continue to operate.

• ✗

  The laptop's operating system has detected the liquid and disabled input devices

  Why it's wrong here

  Modern consumer operating systems are not equipped with built-in liquid detection capabilities that can automatically disable input devices in response to a spill. While some industrial or specialized rugged devices might have environmental sensors, standard laptops lack the necessary hardware (e.g., liquid sensors) for the OS to detect such an event. The operating system primarily manages software and hardware interfaces, but it cannot independently sense physical environmental conditions like liquid presence to trigger a protective shutdown of specific components.

Go deeper

Related to this question