Deck 3: Wireless Sensor Network Applications and Challenges

Question 1

___________allows the same time or frequency division multiplexing to be reused across non overlapping clusters

A)migration
B)clustering
C)classification
D)centralization

Answer 1

clustering

Question 2

The more capable nodes can naturally play the role of __________

A)cluster leader
B)cluster node
C)cluster head
D)cluster master

Answer 2

cluster head

Question 3

__________are nodes that aid in passing traffic from one cluster to another

A)gateway
B)gradient
C)router
D)termional node

Answer 3

gateway

Question 4

In wireless sensor network

A)no special master clocks are available
B)connections are ephemeral
C)communication delays are inconsistent and unpredictable
D)all of above

Question 5

In wireless sensor network

A)communication delays are consistent and predictable
B)no special master clocks are available
C)neither a nor b
D)a and b both

Question 6

Time difference caused by the lack of a common time origin are referred to as___________

A)clock phase difference
B)clock bias
C)neither a nor b
D)a and b both

Question 7

Drawbacks of GPS to use in WSN node is

A)gps receivers are difficult to incorporate into every sensor node due to cost, power consumption, large form factors
B)gps systems do not work indoor or under ford foliage or in other expectable conditions
C)neither a nor b
D)a and b both

Question 8

_____sensor can be tasked to look for animals of a particular size and color. _____sensor can be tasked to detect the presence of a particular type of vehicle

A)i.acoustic ii.camera
B)i.camera ii.acoustic
C)i.camera ii.camera
D)i.acoustic ii.acoustic

Question 9

select the correct statement

A)the purpose of a sensor system is to obtain information that is as extensive and detailed as possible about the unknown parts of the world state
B)the main idea of information based sensor tasking is to base sensor selection decisions on information content as well as constraints on resource consumption, latency and other costs
C)a and b both correct
D)a and b both incorrect

Question 10

In __________sensor network systems, we must balance the information contribution of individual sensors against the cost of communicating with them

A)centralized
B)distributed
C)centralized as well as distributed
D)none of above

Question 11

From a data storage point of view ,one may think of a sensor network as a distributed database that

A)collects physical measurements about the environment
B)indexes them
C)serves queries from users and other applications external to or from within the network
D)all of above

Question 12

In__________ database systems, data storage may be allocated among several geographical separated locations, connected by a communications network

A)centralized
B)distributed
C)centralized as well as distributed
D)none of above

Question 13

Each sensor in a sensor network takes___________ measurements of physical phenomena such as heat, sound, light ,pressure or motion

A)time stamped
B)time sequenced
C)time sequenced as wella as time stamped
D)either time sequenced or time stamped

Question 14

The challenge in sensor network databases is/ are

A)the system as a whole is highly volatile
B)relational tables are not static since new data is continuously being sensed
C)the high energy cost of communication encourages in-networking processing during query execution
D)all of the above

Question 15

The challenges in sensor network databases
A: limited storage on nodes and high communication costs imply that older data has to be discarded
B: sensor tasking interacts in numerous ways with the sensor database system

A)a only
B)b only
C)neither a nor b
D)a and b both

Question 16

The size of wireless sensor system is limited mostly by
A: the cost of maintaining communication links
B: the cost of sensor hardware

A)a
B)b
C)both
D)neither a nor b

Question 17

Following are application areas of wireless sensor network
A: asset and warehouse management
B: automotive
C: building monitoring and control
D: environmental monitoring

A)a b c
B)b c d
C)a c d
D)a b c d

Question 18

Following are application areas of wireless sensor networks
A: health care
B: industrial process control
C: military battlefield awareness
D: security and surveillance

A)a b c
B)b c d
C)a c d
D)a b c d

Question 19

Sensors may be used
A: to monitor and track assets such as trucks or other equipment
B: to manage assets for industries such as oil and gas, utility , and aerospace

A)a
B)b
C)both
D)neither a nor b

Question 20

Sensors can be used
A: to monitor conditions and movements of wild animals or plants in wildlife habitats
B: to monitor air quality and track environmental pollutants, wildfires or other natural or manmade disasters
C: to monitor biological or chemical hazards to provide early warnings
D: to monitor earthquake

A)a b c
B)a b c d
C)a c d
D)b c d

Question 21

___________sensors instrumented in a building can detect the direction and magnitude of a quake and provide an assessment of the building safety

A)seismic
B)acoustic
C)acoustic or seismic
D)position

Question 22

The applications of WSN are:

A)monitoring of objects only.
B)monitoring of an area only.
C)monitoring of both area and objects
D)all of above

Question 23

Wireless Sensor Networks are networks that consists of sensors which are
A: distributed in an ad hoc manner.
B: These sensors work with each other to sense some physical phenomenon and then the information gathered is processed to get relevant results.
C: Wireless sensor networks consists of protocols and algorithms with self-organizing capabilities.

A)a and b
B)b and c
C)a , b and c
D)a and c

Question 24

Communication paradigm used in wireless sensor networks and in ad-hoc network are respectively

A)point to p[oint , point to poiunt
B)broadcast , point to point
C)point to point , broadcast
D)broadcast , broadcast

Question 25

wireless sensor networks are

A)data centric
B)address centric
C)both
D)none opf above