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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