UGC NET Computer Science July 2018 - II Question 44

Question 44

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44. Which of the following statements are true ?

(a) Advanced Mobile Phone System (AMPS) is a second generation cellular phone system.
(b) IS - 95 is a second generation cellular phone system based on CDMA and DSSS.
(c) The Third generation cellular phone system will provide universal personnel
communication.
Code :

1. (1) (a) and (b) only
2. (2) (b) and (c) only
3. (3) (a), (b) and (c)
4. (4) (a) and (c) only

Answer : (2) (b) and (c) only

Explanation Question 44

AMPS is first generation. So, options (1),(2),(4) can be discarded as statement (a) is wrong.
Right option remained is (2) (b) and (c) only
AMPS is a first-generation cellular technology that uses separate frequencies, or "channels", for each conversation

IS - 95:
Interim Standard 95 (IS-95) was the first ever CDMA-based digital cellular technology. It was developed by Qualcomm and later adopted as a standard by the Telecommunications Industry Association in TIA/EIA/IS-95 release published in 1995. The proprietary name for IS-95 is cdmaOne. It is a 2G mobile telecommunications standard that uses CDMA.

Third generation cellular phone system:
The UMTS (Universal Mobile Telecommunications Service) system, first offered in 2001, standardized by 3GPP, used primarily in Europe, Japan, China (however with a different radio interface) and other regions predominated by GSM (Global Systems for Mobile) 2G system infrastructure. The cell phones are typically UMTS and GSM hybrids. Several radio interfaces are offered, sharing the same infrastructure.

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