Wireless Sensor Networks Wsn Set 17 MCQs

Q1 | Range-free localization trying to find _____________ values distances or angles.

exact

approximate

actual

none of these

Q2 | Following is the example of Range-Free Localization.

hop-based localization

point in triangle (pit)

both a and b

triangulation

Q3 | Trilateration technique measures the _______to all anchors and Triangulation measures ________to all anchors,

angle, distance

angle, angle

distance, angle

distance, distance

Q4 | Hop Based Localization uses the ___________ to calculate the approximate distance to the anchor.

median hop length

mean hop length

minimum hop length

maximum hop length

Q5 | Node A and B 130 meters away and 5 hope separated. Node B and C 170 meters away and 6 hope separated and Node A and c 120 meters away and 5 hope separated. Then the mean hop length is___ meters.

24

28.3

26

26.1

Q6 | Node A and B 130 meters away and 5 hope separated and Node A and c 120 meters away and 5 hope separated. Then the mean hop length is___ meters.

24

25

26

50

Q7 | While testing whether a node is inside a triangle or outside by moving node under consideration in any direction. If it gets closer or further away from all three triangle corners, then it is ________ the triangle.

outside

inside

may outside or inside

cannot predict

Q8 | While testing whether a node is inside a triangle or outside by moving node under consideration in any direction. If it does not gets closer or further away from all the three triangle corners, then it is ________ the triangle.

outside

inside

may outside or inside

cannot predict

Q9 | The node in the network, which produces the required data and is able to send it out to other nodes in the network is called as

data source

data destination

data forwarder

data sink

Q10 | The node in the network, which requires the data and is able to receive it from other nodes in the network is called as

data source

data destination

data forwarder

data sink

Q11 | Any node in the network, which is able to receive it from another node and to send it further is called as

data source

data destination

data forwarder

data sink

Q12 | A dedicated node(s) in the network, which is the embedded destination of any data in this network is called as

data source

data destination

data forwarder

data sink

Q13 | Select the correct statement

a valid routing path may consists of infinite number of nodes but it does not contain loops.

a valid routing path consists of a finite number of nodes and it may contain loops.

a valid routing path consists of a finite number of nodes and it does not contain loops.

a valid routing path consists of a finite number of nodes and it contain loops.

Q14 | Select the incorrect statement.

while a normal data destination cannot change over time, the sink can.

a sink can be mobile and change its position.

sink may have additional broadband communication interface

the individual nodes on the path are called as hops.

Q15 | Select the incorrect statement.

while a normal data destination can change over time, the sink usually does not.

a sink cannot be mobile and change its position.

sink may have additional broadband communication interface

the individual nodes on the path are called as hops.

Q16 | ___________ delivers the message to all nodes in the network. Single source and all destinations

full network broadcast

unicast

multicast

convergecast

Q17 | _____________ has one source and one destination, which could be any nodes in the network

full network broadcast

unicast

multicast

convergecast

Q18 | ___________ has several destinations. There is a single source, but multiple destinations of the data.

full network broadcast

unicast

multicast

convergecast

Q19 | _____________ is special sensor networks and refers to the collection of data from all nodes to a dedicated sink.

full network broadcast

unicast

multicast

convergecast

Q20 | Select incorrect statement

hop corresponds to some distance in the network, thus more hops correspond to longer distance.

geographic proximity guarantee the availability or the shortness of a route to the destination.

number of hops from the destination is not available at all nodes. needs to be discovered

two protocols can use the same metric, but perform the routing differently and with different efficiency.

Q21 | Select incorrect statement

hop corresponds to some distance in the network, thus more hops correspond to longer distance.

geographic proximity does not guarantee the availability or the shortness of a route to the destination.

number of hops from the destination is always available at all nodes.

two protocols can use the same metric, but perform the routing differently and with different efficiency

Q22 | Select incorrect statement

hop corresponds to some distance in the network, thus more hops correspond to longer distance.

geographic proximity does not guarantee the availability or the shortness of a route to the destination.

number of hops from the destination is not available at all nodes. needs to be discovered

two protocols can use the same metric, perform the routing differently but has same efficiency.

Q23 | Which of the following is not a prohibitive factors for GPS in wireless sensor networks

power consumption

accuracy maximum up to 15 meters

cost and size

need for line of sight (los)

Q24 | In WSN messages travel multiple hops, so if it has a________ reliability on each link, then the probability of a message transiting the entire network would be _________.

high, high

high, low

low, low

low, high