Mobile Communication MCQ with Answer for exam and interview explanation [21-40].
21) Which type of data network supports the interconnection of computers
within highly populated area?
a. LAN
b. WAN
c. MAN
d. None of the above
ANSWER: (c) MAN
22) Which among the following is/are supported by LAN?
a. PABX
b. PSTN
c. SBDN
d. All of the above
ANSWER: (a) PABX
23) If the voice channel is free in PSTN, then what would be the maximum
data rate supported by 3.1 kHz bandwidth of voice channel?
a. 2000 bps
b. 4000 bps
c. 6000 bps
d. 8000 bps
ANSWER: (c) 6000 bps
24) In Phase Shift Keying, how many bit/s is/are allowed to be transmitted per
shift?
a. 1
b. 2
c. 4
d. 8
ANSWER: (b) 2
25) Which among the following utilizes the transmission line upto 85 – 95 %?
a. Voice Traffic
b. Data Traffic
c. Both a and b
d. None of the above
ANSWER: (a) Voice Traffic
26) If the system is designed with the usage of hexagonal-shaped cells, how
are the base-stations located?
a. At the centre of cell
b. At the edge of cell
c. At the corner of the cell
d. All of the above
ANSWER: (d) All of the above
27) Which antennas are used at the center of the cells for the system with
hexagonal-shaped cells?
a. Omni-directional antennas
b. Sectored directional antennas
c. Both a and b
d. None of the above
ANSWER: (a) Omni-directional antennas
28) In a cellular telephone system, which type of interference results from
imperfect design of filters in receivers by allowing nearby frequencies to enter
the receiver?
a. Co-channel Interference
b. Adjacent-channel Interference
c. Both a and b
d. None of the above
ANSWER: (b) Adjacent-channel Interference
29) Which effect is widespread in adjacent-channel interference especially
after the reception of a weak signal by a mobile user from the base-station?
a. Near-far effect
b. Doppler’s effect
c. Capture effect
d. Kendall effect
ANSWER: (a) Near-far effect
30) Which method of cellular network assists in minimizing the co-channel
interference associated with the angle of degree?
a. Cell Splitting
b. Cell Sectoring
c. Cell Segmentation & Dualization
d. None of the above
ANSWER: (b) Cell Sectoring
31) Which type of connection takes place between an incoming trunk and an
outgoing trunk?
a. Local call
b. Outgoing call
c. Incoming call
d. Transit call
ANSWER: (d) Transit call
32) In message switching system, an incoming message gets ____ especially if
the required route is busy.
a. lost
b. stored in a queue & retransmitted
c. sampled
d. recovered
ANSWER: (b) stored in a queue & retransmitted
33) Which type of switching network involves the establishment of a dedicated
path between two stations?
a. Message Switching
b. Packet Switching
c. Circuit Switching
d. Manual Switching
ANSWER: (c) Circuit Switching
34) In packet switching, what does the header of each short size of packet
consist of?
a. Source address
b. Destination address
c. Intermediate nodes
d. All of the above
ANSWER: (d) All of the above
35) In manual switching, which kind of battery exchange has the provision of
subscribers set along with magneto generator?
a. Local battery exchange
b. Central battery exchange
c. Both a and b
d. None of the above
ANSWER: (a) Local battery exchange
36) If a group of trunk is offered 1200 calls during the busy hour & 20 calls are
lost along with the average call duration of about 7 min, then what would be the
total duration of congestion period?
a. 21.6 sec
b. 42.2 sec
c. 57.6 sec
d. 98.2 sec
ANSWER: (c) 57.6 sec
37) In analyzing the traffic performance, how is the number of trunk decided
with the provision of the Grade of Service (GoS) especially for larger group?
a. By normal load condition
b. By overload condition
c. By underload condition
d. None of the above
ANSWER: (b) By overload condition
38) If the queuing systems are connected in tandem configuration, what would
be the nature of delay?
a. Commutative
b. Distributive
c. Cumulative
d. Deductive
ANSWER: (c) Cumulative
39) Which type of holding time distribution is assumed for the voice
conversation on telephone?
a. Constant
b. Exponential
c. Both a and b
d. None of the above
ANSWER: (b) Exponential
40) Which model of loss system allows the usage of Poisson distribution
model for traffic analysis especially by assuming infinite number of users?
a. Lost Calls Cleared (LCC)
b. Lost Calls Returned (LCR)
c. Lost Calls Held (LCH)
d. None of the above
ANSWER: (a) Lost Calls Cleared (LCC)
