Which of the following are characteristics of cellular networks?
a) thousand radio signals
b) several access networks
c) speech telephony
d) all of these
What are the examples of cellular network?
a) GSM
b) CDMA
c) both a & b
d) none of these
Explanation: (GSM stand for global system for mobile communication)
(CDMA stand for code division multiple access)
Global positioning system is a……… based navigation system.
a) satellite-based
b) network-based
c) communication-based
d) none of these
How many satellites are in global positioning system?
a) 21 satellites
b) 22 satellites
c) 23 satellites
d) 24 satellites
Who constructed and operated global positioning system?
a) America
b) Germany
c) England
d) Norway
During which year the project on GPS was launched?
a) 1972
b) 1973
c) 1974
d) 1975
