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RPSC RAS 2018 · Question 86 of 148

Which of the following difference between Bluetooth and wi-fi is correct?

General Studies

  1. ABluetooth uses 2.4 GHz radio frequency band, whereas wi-fi can use 2.4 GHz or 5 GHz frequency band.
  2. BBluetooth is used for Wireless Local Area Networks (WLAN) only whereas wi-fi is used for Wireless Wide Area Networks (WWAN) only.
  3. CWhen information is transmitted between two devices using Bluetooth technology, the devices have to be in line of sight of each other, but when wi-fi technology is used the devices need not be in the line of sight of each other.Correct
  4. DBoth the statements (Bluetooth uses 2.4 GHz radio frequency band, whereas wi-fi can use 2.4 GHz or 5 GHz frequency band.) & (Bluetooth is used for Wireless Local Area Networks (WLAN) only whereas wi-fi is used for Wireless Wide Area Networks (WWAN) only) are correct in this context.

Answer: C. When information is transmitted between two devices using Bluetooth technology, the devices have to be in line of sight of each other, but when wi-fi technology is used the devices need not be in the…

Explanation

Official RPSC answer key (2018): option 3.

Source: RPSC RAS Prelims 2018 Official Paper (05/08/2018), answers per official RPSC answer key

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