Wireless Sensor Networks Wsn Set 2
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This set of Wireless Sensor Networks (WSN) Multiple Choice Questions & Answers (MCQs) focuses on Wireless Sensor Networks Wsn Set 2
Q1 | Which one of the following frequency bands is used for cordless phones?
- 40 mhz
- 900 mhz
- 75 mhz
- 300 mhz
Q2 | What wireless mode is being used by a student who uses a wireless connection to link to her lab partner's notebook PC in a study hall?
- ad-hoc
- infrastructure
- fixed-base
- roaming
Q3 | What is the acronym used to indicate a network that provides support for a single user in a 10-meter range?
- man
- can
- lan
- pan
Q4 | Ad-hoc mode of wireless network is also known as __________ mode.
- router
- roaming
- infrastructure
- digital
Q5 | This mode of wireless network allows devices to communicate directly with each other.
- digital
- physical
- ad-hoc
- infrastructure
Q6 | Each node is equipped with
- only one sensing device
- one or more sensing devices
- only more than one sensing devices
- no sensing device attached
Q7 | ___________routes user queries or commands to appropriate nodes in a sensor network
- bridge and gateway both
- bridge only
- gateway only
- none of above
Q8 | Communicating 1 bit over the wireless medium at short ranges consumes ___________energy than processing that bit.
- less
- more
- equal
- can not compare
Q9 | A sensor network is designed to collect information from a___________ environment
- logical
- physical
- logical as well as physical
- none of above
Q10 | It is more appropriate to address nodes in a sensor network by_____ than by______
- ip address/physical properties
- netwok address / ip address
- ip address / netwok address
- physical properties/ ip address
Q11 | The challenges we face in designing sensor network systems and applications include
- limited hardware
- limited support for networking
- limited support for software development
- a, b, and c all included
Q12 | The greatest advantage of networked sensing are in improved___________
- robustness
- scalability
- both
- not applicable
Q13 | A___________ sensing system is inherently more robust against individual sensor node or link failures, because of redundancy in the network
- centralized
- decentralized
- both
- not applicable
Q14 | Because of the unique attenuation characteristics of RF signals, _____network provides a significant energy saving over ______network for the same distance
- single hop/multi hop
- multi hop / single hop
- wireless/ wired
- single hop/ wired
Q15 | Using more nodes increases
- the cost
- the power consumption of components
- neither a nor b
- a and b both
Q16 | Each sensor has a finite sensing range, determined by the___________ floor of the sensor
- ground
- noise
- ground and noise
- none of above
Q17 | Once a signal source is inside the sensing range of a sensor, further increasing the sensor density ___________the average distance from a sensor to the signal source, hence improving the SNR
- decreases
- increases
- maintain
- does not affect
Q18 | A sensor network is designed to perform a set of high level information processing tasks such as
- detection
- tracking
- classification
- all above
Q19 | application of WSN for Infrastructure protection is
- traffic, habitat,
- power grids, water distribution
- habitat, security
- responsive environment
Q20 | environmental monitoring is carried out using WSN for
- multi-target tracking
- power grids, water distribution
- traffic, habitat, security
- appliances, factory, supply chains
Q21 | Following are essential characteristics of current sensor network
- the nodes have only modest processing power and memory
- network links and nodes can come and go
- neither a nor b
- a and b both
Q22 | select the correct statement
- what is important to the sensor network is the information the nodes contain, not the nodes themselves
- in wireless sensor networks, nodes can be destroyed, be asleep or die from malfunction or battery depletion
- preservation of energy is of paramount concern in wireless sensor network
- all are correct
Q23 | select the correct statement
- what is important to the sensor network is the information the nodes contain, not the nodes themselves
- preservation of energy is of paramount concern in wireless sensor network
- a and b both
- neither a nor b
Q24 | select the correct statement
- in wireless sensor networks, nodes can be destroyed, be asleep or die from malfunction or battery depletion
- what is important to the sensor network is the information the nodes contain, not the nodes themselves
- neither a nor b
- a and b both
Q25 | Network for sensor networks is ____centric but not ______centric
- node , data
- data , node
- node , information
- link , data