Multiple choice general knowledge math & puzzles

Bluetooth has eliminated the need for which of the following?

  1. CPU Fans

  2. PDA display screens

  3. Operating systems

  4. Serial port communication
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bluetooth is a wireless technology designed to replace cables, specifically serial port (RS-232) communication for peripherals. It does not replace operating systems, CPU fans, or display screens, which perform entirely different hardware or software functions.

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