Computer Hardware and Networking MCQ Quiz Hub

1. In CDMA, the system uses ______for the Forward and Reverse links
FDD
TDD
Both 1 & 2
None of the above

2. Which of this is not a call set up the channel?
Sport Pilot
Long Pilot
Global Pilot
Access Channel

3. Channels used for the call is called
The Broadcast Channel group
Call Setup Channel group
Assigned Channel group
None of the above

4. Which of these signaling is used for the PSTN network interface
R2
V5.2
CCS No. 7
Any of the above

5. Which of this Controls FSU power during the call?
APC Channel
Traffic Channels
Order wire
Access Channel

6. Which of this is an Assigned Channel?
Long Pilot
Order wire
Access Channel
Fast Broadcast Channel

7. Which of this channel is unidirectional?
Broadcast
Call Setup
Assigned
None of the above

8. Which of this channel is unidirectional?
Broadcast
Call Setup
Assigned
None of the above

9. How many traffic channels are there in each FSU?
Up to 1 per FSU
Up to 2 per FSU
Up to 3 per FSU
Up to 4 per FSU

10. The system is equipped with _________________ for data service.
IWF
BSM
FSU
None of the above

11. In general, Spread Spectrum communications are distinguished by which of these elements?
The signal occupies a bandwidth much greater than that which is necessary to send the information
The bandwidth is spread by means of a code which is independent of the data
The receiver synchronizes to the code to recover the data
All of the above

12. Which of this is the way to spread the bandwidth of the signal
Frequency Hopping
Time hopping
Direct sequence
All of the above

13. The digital data is directly coded at a much higher frequency. The code is generated pseudo-randomly, the receiver knows how to generate the same code, and correlates the received signal with that code to extract the data. Which type of spread spectrum is this?
Frequency Hopping
Time hopping
Direct sequence
None of the above

14. The signal is transmitted in short bursts pseudo-randomly, and the receiver knows beforehand when to expect the burst. Which type of spread spectrum is this?
Frequency Hopping
Time hopping
Direct Sequence
None of the above

15. What is the data rate for Adaptive Differential Pulse Code Modulation (ADPCM)
8 bits/sec
16 bits/sec
32 bits/sec
64 bits/sec

16. What is the data rate for Low Delay Code Excited Linear Prediction (LD-CELP)?
8 bits/sec
16 bits/sec
32 bits/sec
64 bits/sec

17. The subscriber unit correctly generates its own matching code and uses it to extract the appropriate signals. Each subscriber uses
signal independent channels.
several independent channels.
signal dependent channels.
several dependent channels.

18. In CDMA, the pseudo-random code must have the following property
It must be deterministic
It must appear random to a listener without prior knowledge of the code
The code must have a long period
All of the above

19. What will be the correlation of two codes, if the two codes are identical?
0
0.5
1
infinite

20. The bit rate of the PN code is called
Chipping Frequency (FC)
Information rate (fi)
Chip
Epoch

21. In CDMA, the bit rate of the digital data is called
chipping frequency
information rate
chip
Epoch

22. One bit of the PN code is called
chipping frequency
information rate
chip
Epoch

23. The length of time before the code starts repeating itself (the period of the code) is called
chipping frequency
information rate
chip
Epoch

24. The epoch must be _________ the round trip propagation delay A. B. longer than C. equal to
shorter than
longer than
equal to
All of the above

25. CDMA technology is inherently resistant to
interference
jamming
Both 1 & 2
None of the above

26. Spatial filtering, such as vectorization, ______________system capacity.
increases
decreases
does not depend
None of the above

27. A 6-sector cell would have a ___________capacity than a 3-sector cell.
same
lower
higher
None of the above

28. When a cell becomes heavily loaded, it __________.
shrinks
expands
remain same
None of the above

29. ___________ is the constant change of the range of the geographical area covered by a cellular telephone transmitter based on the amount of traffic currently using that transmitter.
FER
Cell loading factor
Cell breathing
Sectorization

30. Capacity is_____________proportional to the required Eb/No of the system.
inversely
directly
square
None of the above

31. If a system requires 4 kHz of bandwidth to continuously send 8000 binary digits/sec, the bandwidth efficiency will be _______
0.5 bits/s/Hz
1 bits/s/Hz
2 bits/s/Hz
32 bits/s/Hz

32. The capacity of CDMA cell depends on
power control accuracy
interference power
Both 1 & 2
None of the above

33. _________is considered when two cells (or sectors) of the same site are involved
Harder Handover
Softer Handover
No Handover
None of the above

34. The spreading bandwidth for the CDMA environment is 1.23 MHz. The voice activity factor is assumed to be _____________.
1.375
0.375(0.3 to 0.4)
0.125
None of the above

35. Eb/No is the measure of __________________ for a digital communication system
signal to noise ratio
bit error ratio
spectral power
None of the above

36. Eb/No is measured at the _______________and is used as the basic measure of how strong the signal is.
output of the receiver
input to the receiver
input to the transmitter
output of the transmitter

37. What will be the path loss in dB for an open-air site?
-8.27 dB
-80.27 dB
80.27 dB
8.27 dB

38. What will be the required transmitter power, in the above example? (fade margin=30dB)
25 mW
55 mW
110 mW
None of the above

39. What will be the required transmitter power, in the above example? (fade margin=30dB)
25 mW
55 mW
110 mW
None of the above

40. Maximum capacity is achieved when Eb/No of every user is at the ____________ level needed for the acceptable channel performance.
minimum
maximum
moderate
None of the above

41. The ratio of the number of erroneous frames received to the total number of a frame received for a defined period of time is called the _____________.
Bit Error Rate (BER)
Frame Ratio(FR)
Frame Error Rate (FER)
None of the above

42. Which of this is a parameter which is used by CDMA networks to implement power allocation techniques for controlling the amount of power used by a base station and a mobile in transmitting and/or receiving communication signals?
BER
FER
frequency reuse factor
Eb/No

43. What is the frequency reuse factor in CDMA?
0
1
10
infinity

44. In CDMA, Reduction of co-channel interference due to processing gain allows frequency reuse factor of ________.
zero
one
ten
infinity

45. Sectorization Reduces Interference and adds a Gain to the system which is called _______________
Sectorization removal
Sectorization Gain
FER
Cell breathing

46. Total Interfering Power from all Directions/ Perceived Interference Power by the sector antenna is called ____________.
BER
sectorization gain
FER
Cell breathing