1) The modulation technique used for mobile communication systems during world war II was
a. Amplitude modulation
b. Frequency modulation
c. ASK
d. FSK
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2) ----------- introduced Frequency Modulation for mobile communication systems in 1935.
a. Edwin Armstrong
b. Albert Einstein
c. Galileo Galilei
d. David Bohm
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3) The early FM push-to-talk telephone systems were used in
a. Simplex mode
b. Half duplex mode
c. Full duplex mode
d. None of the above
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4) DECT stands for
a. Digital European Cellular Telex
b. Digitized Emergency Cellular Telephone
c. Digital European Cordless Telephone
d. Digital European Cellular Telephone
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5) World's first cellular system was developed by
a. Nippon Telephone and Telegraph (NTT)
b. Bellcore and Motorola
c. AT&T Bell Laboratories
d. Qualcomm
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6) Paging systems were based on
a. Simplex systems
b. Half duplex systems
c. Full duplex systems
d. None of the above
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7) Paging systems could be used to
a. Send numeric messages
b. Send alphanumeric messages
c. Voice message
d. All of the above
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8) Garage door opener is a
a. Transmitter
b. Receiver
c. Transceiver
d. None of the above
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9) Carrier frequency of a TV remote control is in the range
a. of Infra red
b. < 100 MHz
c. < 1 GHz
d. < 2 GHz
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10) Half duplex system for communication has
a. Communication in single direction
b. Communication in single direction at a time
c. Communication in both directions at the same time
d. None of the above
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11) MIN stands for
a. Mobile Identification Number
b. Mobile Internet
c. Mobility In Network
d. None of the above
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12) The process of transferring a mobile station from one base station to another is
a. MSC
b. Roamer
c. Hand off
d. Forward channel
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13) PCN is
a. Wireless concept of making calls
b. For receiving calls
c. Irrespective of the location of the user
d. All of the above
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14) IMT-2000 is a digital mobile system that functions as
a. Pager
b. Cordless
c. Low earth orbit satellites
d. All of the above
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15) The 2G cellular network uses
a. TDMA/FDD
b. CDMA/FDD
c. Digital modulation formats
d. All of the above
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16) NADC is a 2G standard for
a. TDMA
b. CDMA
c. Both a & b
d. None of the above
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17) 2G CDMA standard - cdma one supports up to
a. 8 users
b. 64 users
c. 32 users
d. 116 users
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18) 2G standards support
a. Limited internet browsing
b. Short Messaging Service
c. Both a & b
d. None of the above
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19) The 2G GSM technology uses a carrier separation of
a. 1.25 MHz
b. 200 KHz
c. 30 KHz
d. 300 KHz
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20) 3G W-CDMA is also known as
a. UMTS
b. DECT
c. DCS-1800
d. ETACS
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21) Commonly used mode for 3G networks is
a. TDMA
b. FDMA
c. TDD
d. FDD
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22) The minimum spectrum allocation required for W-CDMA is
a. 5MHz
b. 2MHz
c. 500KHz
d. 100KHz
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23) CDMA2000 1xEV provides high speed data access with channel allocation of
a. 5 MHz
b. 50 MHz
c. 1.25 MHz
d. 4 MHz
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24) In TD-SDMA, there is a frame of _____milliseconds and the frame is divided into _____ time slots.
a. 5, 7
b. 7, 5
c. 2, 5
d. 5, 2
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25) The interference between the neighboring base stations is avoided by
a. Assigning different group of channels
b. Using transmitters with different power level
c. Using different antennas
d. All of the above
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26) Radio capacity may be increased in cellular concept by
a. Increase in radio spectrum
b. Increasing the number of base stations & reusing the channels
c. Both a & b
d. None of the above
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Answer
Explanation
Related Ques
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ANSWER: Increasing the number of base stations & reusing the channels
Explanation:
No explanation is available for this question!
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27) The shape of the cellular region for maximum radio coverage is
a. Circular
b. Square
c. Oval
d. Hexagon
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28) Hexagon shape is used for radio coverage for a cell because
a. It uses the maximum area for coverage
b. Fewer number of cells are required
c. It approximates circular radiation pattern
d. All of the above
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29) Centre excited hexagonal cells use
a. Sectored directional antennas
b. Omni directional antennas
c. Yagi uda antennas
d. None of the above
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30) Spectrum Efficiency of a cellular network is
a. The traffic carried by whole network
b. The traffic carried per cell divided by the bandwidth of the system and the area of a cell
c. Expressed in Erlang /MHz /km2
d. Both b and c
e. Both a and c
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31) The advantage of using frequency reuse is
a. Increased capacity
b. Limited spectrum is required
c. Same spectrum may be allocated to other network
d. All of the above
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32) The strategies acquired for channel assignment are
a. Fixed
b. Dynamic
c. Regular
d. Both a and b
e. Both b and c
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33) In a fixed channel assignment strategy, if all the assigned channels are occupied, the call
a. Gets transferred to another cell
b. Gets blocked
c. Is kept on waiting
d. All of the above
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34) In a fixed channel assignment strategy
a. Each cell is assigned a predetermined set of frequencies
b. The call is served by unused channels of the cell
c. The call gets blocked if all the channels of the cell are occupied
d. All of the above
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35) In a dynamic channel assignment strategy,
a. Voice channels are not permanently assigned
b. The serving base station requests for a channel from MSC
c. MSC allocates the channel according to the predetermined algorithm
d. All of the above
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36) Advantage of using Dynamic channel assignment is
a. Blocking is reduced
b. Capacity of the system is increased
c. Both a & b
d. None of the above
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37) Disadvantage of using Dynamic channel assignment is
a. More storage required
b. Calculations and analysis is increased
c. Both a & b
d. None of the above
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38) In Dynamic channel assignment, any channel which is being used in one cell can be reassigned simultaneously to another cell in the system at a reasonable distance.
a. True
b. False
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39) In Handoff
a. Process of transferring the call to the new base station
b. Transfers the call
c. New channel allocation is done
d. All of the above
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40) Delay in handoffs is caused due to
a. Week signal conditions
b. High traffic conditions
c. Un availability of the channel
d. All of the above
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