With reference to ‘Near Field Communication (NFC) Technology’, which of the following statements is/are correct? 1. It is a contactless communication technology that uses electromagnetic radio fields. 2. NFC is designed for use by devices which can be at a distance of even a metre from each other. 3. NFC can use encryption when sending sensitive information. Select the correct answer using the code given below.
- (a) 1 and 2 only
- (b) 3 only
- (c) 1 and 3 only ✓ UPSC's answer
- (d) 1, 2 and 3
Why the answer is (c)
• NFC is a short-range contactless technology using electromagnetic radio fields at 13.56 MHz, used in tap-and-pay cards and phones (statement 1).
• Statement 3 is correct: NFC can use encryption and secure elements when transmitting sensitive data such as payment credentials.
• Statement 2 is wrong: NFC works only within about 4–10 cm, not a metre — the short range is a security feature.
• Hence 1 and 3 only, option (c).
Why the other options are wrong
- (a) 1 and 2 only
- Statement 2 is wrong: NFC range is a few centimetres.
- (b) 3 only
- Statement 1 is also correct: NFC uses radio fields.
- (d) 1, 2 and 3
- Statement 2 is wrong.
Asked in the GS Paper I of the UPSC Civil Services Preliminary Examination 2015, held on 23 August 2015. Question and answer key: Union Public Service Commission. Explanation: UPSC Answer Check.