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Free download in PDF Wireless Communication Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
The modulation technique used for mobile communication systems during world war II was
[A]
Amplitude modulation
[B]
Frequency modulation
[C]
ASK
[D]
All of these
Answer: Frequency modulation
(2)
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
(3)
Paging systems could be used to
[A]
Send numeric messages
[B]
Send alphanumeric messages
[C]
Voice message
[D]
All of the above
(4)
Half duplex system for communication has
[A]
Communication in single direction
[B]
Communication in both directions at the same time
[C]
Communication in single direction at a time
[D]
All of the above
Answer: Communication in single direction at a time
(5)
The process of transferring a mobile station from one base station to another is
[A]
MSC
[B]
Roamer
[C]
Hand off
[D]
All of these
(6)
IMT-2000 is a digital mobile system that functions as
[A]
Pager
[B]
Cordless
[C]
Low earth orbit satellites
[D]
All of the above
(7)
IMT-2000 is a digital mobile system that functions as
[A]
Pager
[B]
Cordless
[C]
Low earth orbit satellites
[D]
All of the above
(8)
The 2G cellular network uses
[A]
TDMA/FDD
[B]
CDMA/FDD
[C]
Digital modulation formats
[D]
All of the above
(9)
2G standards support
[A]
Limited internet browsing
[B]
Short Messaging Service
[C]
Both a & b
[D]
None of the above
(10)
Commonly used mode for 3G networks is
[A]
TDMA
[B]
FDMA
[C]
TDD
[D]
FDD
(11)
CDMA2000 1xEV provides high speed data access with channel allocation of
[A]
5 MHz
[B]
50 MHz
[C]
1.25 MHz
[D]
4 MHz
(12)
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 these
Answer: Assigning different group of channels
(13)
Centre excited hexagonal cells use
[A]
Sectored directional antennas
[B]
Omni directional antennas
[C]
Yagi uda antennas
[D]
None of the above
Answer: Omni directional antennas
(14)
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
(15)
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
(16)
The power delay profile helps in determining
[A]
Excess delay
[B]
rms delay spread
[C]
Excess delay spread
[D]
All of the above
(17)
Coherence bandwidth is
[A]
Channel that passes all spectral components with equal gain
[B]
The bandwidth of modulated signal
[C]
Channel that passes all spectral components with linear phase
[D]
Both a and c
(18)
Impulse response of a multipath channel is determined by the fact that
[A]
Mobile radio channel may be modeled as linear filter
[B]
Impulse response is time varying
[C]
Both a & b
[D]
None of the above
(19)
The received signal from a multipath channel is expressed as
[A]
Convolution of transmitted signal and impulse response
[B]
Addition of transmitted signal and impulse response
[C]
Subtraction of transmitted signal and impulse response
[D]
All of the above
Answer: Convolution of transmitted signal and impulse response
(20)
Direct RF pulse system helps in calculating
[A]
Impulse response in frequency domain
[B]
Impulse response in phase domain
[C]
Power delay of the channel
[D]
All of the above
Answer: Power delay of the channel
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