UPSC Previous Year Question | Prelims GS | 2026

Which of the following statements with regard to drone swarms is/are correct? 1. They use Terahertz band of frequency to communicate with the command centre. 2. Individual drones in the swarm can communicate with other drones in the swarm. 3. GPS Spoofing is a commonly used technique to counter drone swarm attack. Select the answer using the code given below:

  1. 1 only
  2. 2 and 3 only
  3. 1 and 2 only
  4. 1, 2 and 3

Answer

Correct Answer

2 and 3 only

Explanation

A defining feature of drone swarms is the ability of individual drones to communicate and coordinate with other drones, making statement 2 correct. GPS spoofing can be used as a counter-drone measure by transmitting false positioning information and disrupting navigation, making statement 3 correct. Terahertz frequencies are not the standard communication band used by drone swarms for command-and-control communication, so statement 1 is incorrect.

Topics: defence technology, drone technology, electronic warfare, science and technology