UPSC CSE Prelims
Question 44
With reference to 'Near Field Communication (NFC) Technology', which of the following statements is/are correct?
- It is a contactless communication technology that uses electromagnetic radio fields.
- NFC is designed for use by devices which can be at a distance of even a metre from each other.
- NFC can use encryption when sending sensitive information.
Select the correct answer using the code given below.
View correct answer and explanation
Correct answer: C
Correct Option: C
Explanation: NFC is a short-range contactless radio technology, usually operating at only a few centimetres, and compatible implementations can protect sensitive exchanges cryptographically.
Statement/Pair-wise Analysis:
Statement/Item 1: Correct - NFC communicates using electromagnetic fields at close range.
Statement/Item 2: Incorrect - NFC is designed for very short distances, not reliable communication across one metre.
Statement/Item 3: Correct - NFC applications can incorporate encryption and authentication for sensitive data.
Option-wise Analysis:
A: Incorrect - includes incorrect statement/item 2; omits correct statement/item 3.
B: Incorrect - omits correct statement/item 1.
C: Correct - includes all and only the correct items.
D: Incorrect - includes incorrect statement/item 2.