Mobile DevicesCâu 47 / 100
Which technology lets a smartphone make contactless payments when tapped at a terminal?
a.Bluetooth
b.GPS
c.NFC
d.Infrared
Giải thích
Near Field Communication (NFC) enables tap-to-pay over very short distances. Bluetooth pairs peripherals, GPS provides location, and infrared is a legacy line-of-sight link.
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