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Q35 (CDS-I/2026) Science & Technology › ICT, AI, Cybersecurity & Emerging Tech

Code Division Multiple Access (CDMA) technology is primarily used in :

Result
Your answer: —  Â·  Correct: A

Explanation

Code Division Multiple Access (CDMA) is a digital cellular technology used for mobile phone communication. It allows multiple users to share the same frequency band simultaneously by assigning a unique mathematical code to each transmitter's signal.

  • Mechanism: Unlike GSM, which uses time-division (TDMA) or frequency-division (FDMA), CDMA spreads data over the entire available bandwidth, improving capacity and security.
  • Usage: It was a foundational technology for 2G and 3G mobile networks (e.g., CDMA2000 and WCDMA).
  • Other Options: X-rays use electromagnetic radiation; Artificial Intelligence refers to computational algorithms; and Colour Xerox machines use xerography or laser printing technology. None of these involve the channel access method defined by CDMA.
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