Class Quiz

Name:

1) Which of the following can be used to improve the energy efficiency of wireless cellular communication network? a) Microcell b) Picocell c) Femtocell d) All

2) Which of the following cannot be categorized as a small cell in the context of

wireless communication network?

a) Distributed antenna system b) Macrocell c) Femtocell d) WiFi access point

3) Most power consuming component of a wireless communication network is a) Retail b) Base station c) Core transmission d) Mobile switching

4) Which of the following is not a cellular base station component?

a) Radio trans receiver b) Power amplifier c) Frequency converter d) Transmitting antenna

5) Which of the following is not an approach for improving energy efficiency? a) Resource allocation management b) Power amplifier c) Small cells d) Signal interference management

6) Which of the following are elements of the telecommunication network? a) Core network b) BS with RF interface c) Mobile terminal d) all

7) Which of the following is not an advantage of cell zooming technology?

a) Load balancing b) Reduce energy consumption c) Energy redistribution d) Minimize no. of users

8) ….. can’t lead to cell resizing? a) Antenna angle adjustment b) Increase antenna power c) Reduce antenna

power d) Transmission frequency adjustment

9) Select correct order of different phases of Cognitive Cycle a) Learn -> Sense -> Plan -> Decide -> Act b) Sense -> Learn -> Plan -> Decide -> Act c) Sense -> Learn -> Decide -> Plan -> Act d) Sense -> Plan -> Learn -> Decide -> Act

10) Which is correct in case of Femto cells? a) Used in house b) offer higher energy efficiency c) for routing call through ADSL d) all

11) Which is not a benefit of Femto cell? a) Higher user satisfaction b) Reduce CAPEX c) Macro cell traffic offload d) Lower

interference

12) Which is correct regarding closed operating model of small cell? a) Authentication needed b) All user can access c) Some resources for non-

registered users d) all

13) Which is not a part of Femto cell architecture? a) Microprocessor b) Operating system c) FPGA d) RF transmitter

14) Smart grid is an excellent alternative to an existing electricity grid.

a) True b) False

15) When base station operates at lower cellular frequency instead of higher cellular frequency, it leads to a) Higher propagation path loss b) Fewer user support c) Higher available

bandwidth d) a and b

16) Which is not a part of Digital Front-end (DFE) of a wireless communication receiver? a) Low noise amplifier 2) Sample rate converter 3) Filters 4) Digital down

convertor

17) Software defined radio paradigm can lead to improve a) Energy efficiency b) Energy and Spectrum efficiency c) Energy efficiency and

Reconfigurability c) Spectrum efficiency and Reconfigurability

18) Chose the correct order of evolution of communication radio a) Hardware driven radios -> Software defined radios -> Green radios -> Cognitive

radios b) Digital radios -> Software defined radios -> Digital radios -> Cognitive radios c) Hardware driven radios -> Digital radios -> Software defined radios -> Cognitive

radios d) Hardware driven radios -> Cognitive radios -> Software defined radios ->

Green Radios

19) Cognitive radio paradigm can lead to a) Energy and spectrum efficiency b) Network efficiency c) Spectrum efficiency d) a and b

20) Channel capacity increases linearly with the increase in bandwidth but only

logarithmically with the increase in noise power a) True b) False

21) Base station switching via Traffic reallocation leads to

a) From the mains power saving b) Transmission power savings c) Higher hardware efficiency d) all

22) Let 퐿푖, 퐿푗 and 퐿푘 be the loads for 3 cells respectively. If 퐿푖 ≥ 푇푠푤푖푡푐ℎ, 퐿j ≥ 푇푠푤푖푡푐ℎ, 퐿푘 ≥ 푇푠푤푖푡푐ℎ, then three cells can be shift to … mode to save energy. a) Omnidirectional mode b) Tri-sectorized mode c) Can’t say d) Either a or b

23) Let 퐿푖, 퐿푗 and 퐿푘 be the loads for 3 cells respectively. Then, 퐿푖 < 푇푠푤푖푡푐ℎ, 퐿푘 <

푇푠푤푖푡푐ℎ, 퐿푘 < 푇푠푤푖푡푐ℎ, then three cells can be shift to … mode to save energy. b) Omnidirectional mode b) Tri-sectorized mode c) Can’t say d) Either a or b

24) White-Fi is the

a) WiFi service provided by cellular operators b) WiFi service provided using cognitive radio services c) Cellular services in conventional WiFi frequency bands d) WiFi services in unused TV white space

25) White-Fi will have advantage of higher date rates over conventional WiFi.

a) True b) False

26) For wide range of path loss models, 1800MHz band experiences at least 4 times (6dB) less path loss as compare d with the 900MHz band. a) True b) False

27) Power saving by increasing the bandwidth B by factor A for a given capacity C is

given by

a) 퐶 −( ∙ )

b) 1−.

c) 1 −. ( ∙ )

d) 퐶 −. ( ∙ )

28) Accuracy of GPS based localization is higher than RSS based localization.

a) True b) False

29) Received Signal Strength (RSS) measurements of mobile terminals are affected by a) Small scale fading b) Path loss c) Large scale fading d) all

30) Nearby mobile terminals will have high probability of observing close RSS values.

a) True b) False

31) Non-parametric methods does not work when entries in RSS matrix are missing. a) True b) False

32) Dedicated channel deployment in Macro-Femto cell network will lead to lower

spectrum efficiency. a) True b) False