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This set of Mobile Communication Multiple Choice Questions & Answers (MCQs) focuses on Mobile Communication Set 2

Q1 | Major classes of signalling are ___________
  • customer line signalling
  • in channel signalling
  • common channel signalling
  • both 2 and 3
Q2 | On an average, one call arrives every 5 seconds. During a period of 10 seconds, what is the probability that no call arrives?
  • 0.123
  • 0.135
  • 0.595
  • 0.455
Q3 | Standards of CCITT Signalling system are _____
  • ss6
  • ss5
  • ss7
  • both 1 and 3
Q4 | Inter register signalling can be done by _________
  • link by link basis
  • end to end basis
  • line signalling
  • all of the above
Q5 | In Erlang's analysis of efficient telephone line usage he derived the formulae for two important cases, ________,
  • erlang-b
  • erlang-c
  • erlang-a
  • both 1 and 2
Q6 | What are the types of inter register signalling?
  • en-bloc signalling
  • overlap signalling
  • both 1 and 2
  • none of the above
Q7 | Erlang determined GoS of lost call system of finite number of trunks based on assumptions: 1. Pure chance traffic 2. Statistical equilibrium 3. Full availability 4. calls which face congestion and get lost
  • 1 and 2
  • 2 and 3
  • 3 and 4
  • all of the above
Q8 | Traffic tables show relationships of ____________
  • offered traffic \a\
  • blocking probability (gos)
  • number of trunks \n\
  • all of the above
Q9 | A group of 10 servers carry a traffic of 5E. If the average duration of calls is 1.5 minutes, calculate the number of calls put through by a single server and a group as a whole in 1 hr period.
  • 20 calls and 200 calls
  • 10 calls and 200 calls
  • 5 calls and 100 calls
  • none of the above
Q10 | A group of 5 trunks carry a traffic of 2E. Find 1. GoS 2. Probability that only one trunk is busy.
  • 0.037 and 0.275
  • 0.027 and 0.325
  • 0.047 and 0.475
  • none of the above
Q11 | Over 10 minutes observation interval, 20 subscribers initiate a call. Total duration of calls is 2400sec. Calculate load offered to network by the subscribers and average subscriber traffic?
  • 4e and 0.1e respectively
  • 2e and 0.5e respectively
  • 3e and 1.5e respectively
  • 1e and 0.2e respectively
Q12 | Which among the following represents the flawless hand-off with no perceivable interruption of service?
  • Hard hand-off
  • Soft hand-off
  •  Intracell hand-off
  • Intercell hand-off
Q13 | If more number of cells are necessary in the frequency reuse distance, then the segmentation & dualization techniques get ________
  • United
  • Divided
  •  Restricted
  • Filtered
Q14 | Which method of cellular network assists in minimizing the co-channel interference associated with the angle of degree?
  • Cell Splitting
  • Cell Sectoring
  • Cell Segmentation & Dualization
  • None of the above
Q15 | Which effect is widespread in adjacent-channel interference especially after the reception of a weak signal by a mobile user from the base-station?
  • Near-far effect
  • Doppler\s effect
  • Capture effect
  • Kendall effect
Q16 | Which antennas are used at the center of the cells for the system with hexagonal-shaped cells?
  • Omni-directional antennas
  • Sectored directional antennas
  • Both a and b
  •  None of the above
Q17 | The most comman dial up service used by a person making home telephone call is_____________
  • Analog Switched Service
  • Analog Leased Service
  • Switched/56 Service
  • Digital Data Service
Q18 | For Telephone voice Transmission to use a T line, the signal must be __________________ before the multiplexed.
  • Synchronized
  • Modulated
  • Sampled
  • Filterd
Q19 | The propagation model that estimates radio coverage of a transmitter is called ___________
  • Large scale propagation model
  • Small scale propagation model
  • Fading model
  • Okumura model
Q20 | Small scale propagation model is also known as _______
  • Fading model
  • Micro scale propagation model
  • Okumura model
  • Hata model
Q21 | Which of the following techniques do not help in expanding the capacity of cellular system?
  • Sectoring
  • Scattering
  • Splitting
  • Microcell zone concept
Q22 | Which of the following technology distributes the coverage of the cell and extends the cell boundary to hard-to-reach places?
  • Cell splitting
  • Scattering
  • Sectoring
  • Micro cell zone concept
Q23 | Cell splitting increases the capacity of a cellular system since it increases the number of times ________ are reused.
  • Cells
  • Channels
  • Transmitters
  • Mobile stations
Q24 | Small scale variations of a mobile radio signal are directly related to _______
  • Impulse response of mobile radio channel
  • Impulse response of base station
  • Frequency response of antenna
  • Frequency response of base station