220-1201 Practice Question: A user complains that their external USB hard…

Answer analysis

Option-by-option breakdown

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

• ✗

  Replace the USB cable.

  Why it's wrong here

  Replacing the USB cable addresses potential physical connectivity issues, but a yellow exclamation mark in Device Manager specifically indicates that the operating system has detected the device but cannot properly communicate with it due to a software-related problem. A faulty cable would more likely result in the device not appearing at all, or intermittently disconnecting, rather than presenting a driver-specific error icon. Therefore, while a new cable might be a general troubleshooting step, it does not target the explicit driver warning.

• ✓

  Update the driver for the unknown device.

  Why this is correct

  Updating the driver for the unknown device is the correct course of action because the yellow exclamation mark signifies that Windows recognizes the device's presence but lacks the necessary software instructions (the driver) to operate it correctly. Installing or updating to the proper driver provides the operating system with the specific protocols and commands required to interface with the external hard drive, allowing it to function as intended and resolve the 'unknown device' status.

• ✗

  Format the external drive.

  Why it's wrong here

  Formatting an external drive is a file system operation that prepares the storage medium for data by creating a new file system structure. This action is performed *after* the operating system has successfully recognized and can communicate with the drive at a fundamental hardware level. If the device is showing as 'unknown' with a driver error, the system cannot properly access it to initiate a format, and even if it could, formatting would not resolve the underlying driver issue preventing its initial recognition.

• ✗

  Disable the USB root hub in Device Manager.

  Why it's wrong here

  Disabling the USB root hub in Device Manager would prevent all USB devices connected to that specific controller from functioning, including the external hard drive in question. A USB root hub acts as the primary interface between the operating system and multiple USB ports. Disabling it would exacerbate the problem by completely cutting off communication to the device, rather than addressing the specific driver issue that is preventing only one device from being properly recognized.

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