Mobile Communication Set 2
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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