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WorksheetsEC8071_CR_MODELEXAM-IV (08.12.2020)_PART-B
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
1. Consider a Digital Generic Radio Transceiver. Among the following,Which cannot be a part of the digital front end (DFE) of this wireless transceiver system.
a)
a)Frequency meter
b)
b) Sample rate converter
c)
c) Filters
d)
d)Digital down converter
2.
2.Four options are given below. among which select an option which can give the correct order of evolution of communication radio
a)
a) Analog radio>Digital radio>software defined radio>cognitive radio
b)
b) software defined radio>cognitive radio>Digital radio>Analog radio
c)
c) cognitive radio>Analog radio>Digital radio>software defined radio
d)
d) Digital radio>software defined radio>Analog radio>cognitive radio
3.
3.Choose the correct order of evolution of cognitive radio technology from the following options.
a)
a) cognitive radio>Hardware Radio>SCA radio>SDR Radio>DSA Radio
b)
b) Hardware Radio>SDR Radio>SCA radio.>DSA Radio>cognitive radio
c)
c) Hardware Radio>SCA radio>SDR Radio>DSA Radio>cognitive radio
d)
d) SDR Radio>DSA Radio>Hardware Radio>SCA radio >Cognitive radio
4.
4.Identify the correct and foremost Function of a software architecture in an SDR fabric from the following.
a)
a) To place waveforms and applications
b)
b) For standardized interfaces
c)
c) filtering
d)
d) Conversion of RF to IF
5.
5.The IEEE 802.22 system enabled cognitive radio(CR) techniques to allow, which among the the following functionalities?
a)
a) sharing of geographically unused spectrum allocated to the television broadcast service, on a non-interfering basis.
b)
b) sharing of geographically unused spectrum allocated to the FM broadcast service, on a non-interfering basis.
c)
c) sharing of geographically unused spectrum allocated to the GSM service, on a non-interfering basis.
d)
d) sharing of geographically unused spectrum allocated to the military service, on a non-interfering basis.
6.
6.Assuming a 6 MHz TV channel bandwidth and a 40:1 over subscription ratio resulting from the stochastic nature of the data network usage, this translates into a total of ________________________user terminals that can be served by the base station per TV channel.
a)
a) 511
b)
b)127
c)
c)1023
d)
d)255
7.
7.The _________________________________ means all nodes (i.e. users) in the network send their spectrum sensing information to the central control unit, and the control unit draws spectrum allocation mapping.
a)
a)Centralized spectrum sharing
b)
b)Distributed spectrum sharing
c)
c)Cooperative spectrum sharing
d)
d)Non-cooperative spectrum sharing
8.
8.Out of the four options given below, In Which of the spectrum sharing method, all the nodes decide their spectrum access by themselves?
a)
a)Centralized spectrum sharing
b)
b)Distributed spectrum sharing
c)
c)Cooperative spectrum sharing
d)
d)Non-cooperative spectrum sharing
9.
9.Cognitive radio will measure the interference environment through a crucial environmental parameter and adjust their transmission such that the interference to Primary User is not above the regulatory limits in case of interference based sensing method.Which among the following corresponds to that parameter?
a)
a)Interference Temperature
b)
b)Interference Margin
c)
c)Noise Figure
d)
d)C/I ratio
10.
10.Consider the scenario of a station monitoring the medium after it sends a frame to see if the transmission was successful. If so, the station is finished. If, however, there is a collision, the frame is sent again. This Picturises _____________________ protocol.
a)
a)CSMA/CA
b)
b)CSMA/CD
c)
c)Slotted ALOHA
d)
d)Pure ALOHA
11.
11. CSMA/CD isfound to be best suited for Wired networks like ETHERNET based networks. But if they were implemented for Wireless Networks, the collision detection performance of the protocol is not up the level. Hence to avoid collisions on wireless networks, ___________________________ was invented.
a)
a)CSMA/CA
b)
b)Wireless CSMA/CD
c)
c)AODVR
d)
d)CRNO
12.
12.If the packet arriving rate is higher than the rate at which the packets are _______________, the receiving buffer will be fully occupied by packets waiting to be processed.
a)
a)removed from the buffer
b)
b)keep on storing in the buffer
c)
c)buffer is closed
d)
d)transmission is stopped
13.
13.Out of the following options,which is the most expected and required advanced feature that can be provided with the next-generation public safety communication equipment?
a)
a)sensors for biomedical and environmental signals
b)
b)sophisticated networking mechanismsthat suppost robust use
c)
c)robotic process automation support
d)
d)AI enabled devices to manage the spectrum occupancy
14.
14. Based on which of the following factors,the value of a spectrum license is determined in the spectrum auction markets?
a)
a) amount of bandwidth in MHz
b)
b) demand within the service region
c)
c) duration of the contract
d)
d)All the above
15.
15.The IOT objects would be equipped with ___________________ in order to learn, think, and make decisions through understanding of both social and physical worlds.
a)
a) intelligent
b)
b) cognition
c)
c) knowledge
d)
d) idea
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