Wireless Sensor Networks Wsn Set 16
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This set of Wireless Sensor Networks (WSN) Multiple Choice Questions & Answers (MCQs) focuses on Wireless Sensor Networks Wsn Set 16
Q1 | _______________ is essential for any WSN application.
- time synchronization
- localization
- time synchronization & localization
- a or b any one
Q2 | For outdoor wireless sensor networks ________ is used for localization
- gps
- postal address
- semantic information
- a and b both
Q3 | Choose the correct statement
- physical coordinates changes and symbolic coordinates remains constant over time
- physical coordinates remains constant and symbolic coordinates changes over time
- physical coordinates and symbolic coordinates both remains constant over time
- physical coordinates and symbolic coordinates changes over time
Q4 | Tracking problem can be described as the solution of a
- set of localization problems at successive time intervals.
- set of localization problems at successive location.
- single localization problems at fixed time intervals.
- all of the above
Q5 | Localization accuracy is the _____________ distance between the estimated and the real position of the sensor node.
- average
- smallest
- largest
- mean
Q6 | A typical GPS receivers achieve 15 meters accuracy with 95% precision. This means that in 95% of all measurements you stay in the radius of 15 meters, whereas in the remaining 5% you have _____ errors.
- smaller
- larger
- can not specify
- a or b
Q7 | Localization methods have _______________ costs associated with it
- communication cost and infrastructure cost only
- space cost and communication cost only
- space cost, communication cost and infrastructure cost only
- space cost, communication cost and energy cost only
Q8 | Few node consist of GPS installed on it to simplify the localization are called as _________.
- anchor nodes
- simple nodes
- master nodes
- router nodes
Q9 | Anchor nodes are the nodes having ________.
- compass on it
- gps on it
- trans-receiver on it
- internet connectivity
Q10 | If the target cooperates itself in localization & tracking, then it is called as _________ target tracking.
- active
- collaborative
- cooperative
- all of these
Q11 | Range Based target tracking algorithm relies on
- distance calculation,
- range calculation,
- connectivity of nodes
- a and b both
Q12 | Range free target tracking algorithm relies on
- distance calculation,
- range calculation,
- connectivity of nodes
- a and c both
Q13 | Pre-deployment Schemes provide sensor nodes with their location information _________ them in the environment.
- before installing
- after installing
- both are possible
- initially during network formation
Q14 | Pre-deployment Schemes provide sensor nodes with their location information of consist of _________
- symbolic information
- postal address
- a and b both
- gps location
Q15 | _____________ has strategy of Non-anchor nodes try to locate themselves by sensing the positions of anchor nodes in their proximity
- post-deployment localization
- pre-deployment localization
- proximity scheme of localization
- b and c both
Q16 | _____________ has strategy of Non-anchor nodes try to locate themselves by sensing the positions of anchor nodes in their proximity
- post-deployment localization
- pre-deployment localization
- neither a nor b
- a and b both
Q17 | In location mules, there are no ____________ in the environment. Instead, a _________ with an on-board GPS receiver is used.
- installed anchors, router
- installed anchors, mobile node
- mobile node, installed anchors
- mobile node, personal computer
Q18 | The ________ the transmission power of the mule, then ________ is the accuracy of positioning.
- weaker, weaker
- better, better
- weaker, better
- none of the above
Q19 | In triangulation, need to measure the angle between the sensor node and the anchors and use this information to compute nodes own position.
- angle
- distance
- angle and distance
- angle and height
Q20 | For trilateration, we measure distances to at least _______ anchors.
- 2
- 3
- 4
- 5
Q21 | For trilateration, we measure _______ between the node and anchors.
- angle
- distance
- angle and distance
- angle and height
Q22 | Trilateration measures distance based on radio communication by mapping _____ values into distances.
- received signal strength indicator - rssi
- link quality indicator - lqi
- rssi or lqi
- rssi and lqi
Q23 | The time difference of arrival method uses ___________ communication interfaces to estimate distance.
- radio only
- acoustic only
- radio and acoustic
- radio or acoustic
Q24 | In case of iterative localization the accuracy of localization ________ with each iteration.
- increases
- decreases
- remains same
- may increase or decrease
Q25 | Node gather enough anchor points and measurements, they compute their own locations. Once they have localized, they also declare themselves as an anchors. In this way, sensor nodes without enough anchors get a chance to localize. This approach is called as ____________ localization.
- iterative
- direct
- range free
- a and c both