220-1201 Practice Question: A technician is troubleshooting a smartphone that…

Answer analysis

Option-by-option breakdown

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

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  The phone's battery level

  Why it's wrong here

  Near Field Communication (NFC) is designed to operate with minimal power consumption. As long as the smartphone has sufficient battery to power on and run its operating system, its NFC chip will typically function correctly. A low battery level might trigger power-saving modes that restrict background app activity or screen brightness, but it does not inherently disable the NFC hardware itself, preventing detection by a terminal. The phone simply needs to be operational.

• ✓

  The phone's NFC antenna location and alignment with the terminal

  Why this is correct

  Near Field Communication (NFC) operates over an extremely short range, typically no more than 4 centimeters (approximately 1.5 inches), relying on inductive coupling between antennas. For a successful transaction, the smartphone's internal NFC antenna must be precisely positioned very close to and correctly aligned with the payment terminal's NFC reader. Even slight misalignment or an insufficient distance can prevent the inductive field from being established, resulting in the terminal failing to detect the phone.

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  The payment terminal's internet connection

  Why it's wrong here

  The payment terminal's internet connection is primarily used for transmitting transaction data to the payment processor for authorization and settlement. While crucial for completing the financial transaction, the internet connection is not required for the initial Near Field Communication (NFC) handshake between the phone and the terminal. The terminal's NFC reader can detect the phone and establish communication locally, even if its backend network connection is temporarily unavailable.

• ✗

  The phone's default payment app settings

  Why it's wrong here

  The phone's default payment app settings dictate which payment method or card is presented to the terminal once an NFC connection has been successfully established. These settings do not influence the fundamental ability of the terminal's NFC reader to detect the presence of the phone's NFC chip. If the terminal is not detecting the phone at all, it indicates a problem with the physical NFC communication layer, such as antenna issues or alignment, rather than the software configuration of the payment application.

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