state gov Rajasthan Gram Vikas Adhikari (VDO) Mock Test 2021 General Science Physics Current Electricity
With reference to the Near Field Communication Technology, consider the following statements:
1. It short-range wireless connectivity technology that allows NFC-enabled devices to communicate with each other.
2. It transmits data through electromagnetic radio fields, to enable communication between two devices.
3. It is used in contactless banking cards to perform money transactions or to generate contactless tickets for public transport.
Which of the above statement is/are correct?
1
1 and 2 only
2
2 and 3 only
3
3 only
4
1, 2 and 3