1. What is the primary advantage of CDMA technology over other cellular technologies?
a) Increased capacity
b) Improved security
c) Longer battery life for devices
d) Lower cost for infrastructure
2. Which type of modulation is used in CDMA systems?
a) Amplitude modulation
b) Frequency modulation
c) Phase modulation
d) Pulse modulation
3. What is the primary function of the spreading code in a CDMA system?
a) To spread the signal over a wider frequency band
b) To scramble the signal for increased security
c) To allow multiple users to share the same frequency band simultaneously
d) To increase the signal strength for improved coverage
4. What is the maximum number of users that can be supported by a CDMA system using 1.25 MHz of bandwidth?
a) 64
b) 128
c) 256
d) 512
5. What is the primary difference between CDMA and GSM systems?
a) CDMA uses spread spectrum technology while GSM does not
b) CDMA uses time division multiplexing while GSM uses frequency division multiplexing
c) CDMA uses a different modulation technique than GSM
d) CDMA uses a different frequency band than GSM
6. Which of the following is not a type of CDMA system?
a) IS-95
b) WCDMA
c) GSM
d) IS-2000
7. How does CDMA technology improve security in cellular systems?
a) By using a unique code for each user
b) By encrypting the signal
c) By using a stronger signal
d) By using a different frequency band
8. What is the primary drawback of CDMA technology?
a) Increased complexity in the infrastructure
b) Reduced capacity
c) Increased cost for devices
d) Reduced coverage area
9. How does CDMA technology improve capacity in cellular systems?
a) By using a unique code for each user
b) By encrypting the signal
c) By using a stronger signal
d) By using a different frequency band
10. What is the primary difference between CDMA and TDMA systems?
a) CDMA uses spread spectrum technology while TDMA does not
b) CDMA uses time division multiplexing while TDMA uses frequency division multiplexing
c) CDMA uses a different modulation technique than TDMA
d) CDMA uses a different frequency band than TDMA
Answers:
[1] a) Increased capacity
[2] c) Phase modulation
[3] c) To allow multiple users to share the same frequency band simultaneously
[4] a) 64
[5] a) CDMA uses spread spectrum technology while GSM does not
[6] c) GSM
[7] a) By using a unique code for each user
[8] a) Increased complexity in the infrastructure
[9] a) By using a unique code for each user
[10] a) CDMA uses spread spectrum technology while TDMA does not