Wireless Sensor Network Question & AnswersMay 3, 2021 By WatElectronics This article lists 100+ Wireless Sensor Network MCQs for engineering students. All the Wireless Sensor Network Questions & Answers given below include a hint and wherever possible link to the relevant topic. This is helpful for the users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on the Wireless Sensor Network topic.Wireless Sensor Network is also represented as “WSN” and it is a group of dedicated sensors that are spatially dispersed to records, monitors physical environmental parameters, and organizes that data at a central location. WSN measures physical parameters such as temperature, pressure, wind, humidity, and many more. This network comprises base stations and nodes at different locations, that communicate wirelessly. WSN for radio communication can be implemented in 4 topologies namely – Star type topology, tree-type topology, and Mesh type topology.Depending on the physical environment, WSN is classified into 5 types namely underground type WSN, terrestrial type WSN, underwater type WSN, multimedia type WSN, and mobile type WSN. The advantage of WSN is to avoid the need for wiring, it is a flexible technology, and can be integrated on a large scale. 1). WSN stands for __________.Wireless sensor networkWired sensor networkWired sensor nodeWireless sensor nodeHintWSN stands for Wireless Sensor Network. 2). WSN are _________ dispersed.SpatiallySpeciallyEquivalentlyUniquelyHintWSN are spatially dispersed. 3). Which of the following is the function of a dedicated sensor?Records and monitors physical condition of environmentOrganizes collected data at a location that is centralizedBoth a and bNone of the aboveHintThe function of a dedicated sensor is that it records and monitors the physical condition of the environment and organizes collected data at a location that is centralized. 4). WSN measures _________ physical parameter.SoundTemperaturePollutionAll the aboveHintWSN measures physical parameters like sound, temperature, pollution, humidity, etc. 5). Does WSN measures wind parameters?YesNoMaybeHintYes, WSN measures wind parameters. 6). WSN depends on ________ connectivity.WirelessWiredRFNone of the aboveHintWSN depends on wireless connectivity. 7). Data in WSN is transmitted by ________ connectivity.WirelessWiredBoth a and bNone of the aboveHintData in WSN is transmitted by wireless connectivity. 8). WSN are spatially distributed _________ sensors.Autonomous sensorsDependent sensorsBi directional sensorsNone of the aboveHintWSN are spatially distributed autonomous sensors. 9). The development of WSN was motivated from __________.MilitaryHospitalsSchoolsOfficesHintThe development of WSN was motivated by military-like surveillance and battlefield. 10). Which of the following are the applications of WSN?Health monitoringIndustrial process monitoring and controlMilitaryAll the aboveHintThe applications of WSN are health monitoring, industrial process monitoring, and control, military. 11). WSN is built with __________.NodesSwitchesWiresRadioHintWSN is built with a large number of nodes. 12). Are each node in WSN interconnected?YesNoMaybeHintYes. each node in WSN interconnected. 13). The components of a sensor node is _________.Radio trans receiverMicrocontrollerAn electronic circuitAll the aboveHintThe components of a sensor node are a radio transceiver, microcontroller circuit, and electronic circuit. 14). What is the purpose of radio transceiver in WSN?Receives the dataTransits the dataBoth transmits and receives the dataNone of the aboveHintThe purpose of the transceiver in WSN is to transmit and receive the data from other nodes. Read more about Radio Transceiver. 15). A radio transceiver in WSN contains which component internally?AntennaWireElectrodeNone of the aboveHintA radio transceiver in WSN contains an antenna internally to communicate with external nodes. 16). Electronic circuit interfaces with which of the following component’s in WSN?SensorsEnergy sourcesSensor and energy sourceNone of the aboveHintThe electronic circuit that interfaces with sensor and energy source component’s in WSN. Read more about Sensors. 17). The energy source used in WSN are __________.BatteryInverterCapacitorNone of the aboveHintThe energy source used in WSN is a battery. 18). Does the size of a sensor node vary?YesNoMaybeHintYes, the size of a sensor node varies. 19). Which of the following constraints depend on the cost and size of the sensor in WSN?EnergyMemorySpeedAll the aboveHintThe constraints that depend on the cost and size of the sensor in WSN are memory, speed, energy, and bandwidth. 20). The cost of a sensor depends on ________ factors.AreaSizeComplexity of designAll the aboveHintThe cost of a sensor depends on the complexity of design factors. 21). A sensor network in WSN can be of _______ topology.StarMulti-hop wireless meshAdvanced multi-hop wireless meshAll the aboveHintA sensor network in WSN can be of multi-hop wireless mesh, advanced multi-hop wireless mesh, and star topology. 22). A star network is implemented using _____ distribution paradigm in computer networks.Spoke hubMeshTriangleNone of the aboveHintA star network is implemented using the spoke hub distribution paradigm in computer networks. 23). WMN in network topology stands for _________.Wireless mesh networkWired mesh networkWired mesh nodeWireless mesh nodeHintWMN in network topology stands for a wireless mesh network. 24). WMN is made up of ______ type of nodes.RadioUFIFNone of the aboveHintWMN is made up of radio type of nodes. 25). WMN can also be a form of _______ network.Wireless ad hocWired ad hocWirelessNone of the aboveHintWMN can also be a form of wireless ad hoc network.Wireless Sensor Network Interview Questions & Answers 26). A wireless mesh network contains _______ components.Mesh clientsMesh routersGatewaysAll the aboveHintA wireless mesh network contains mesh clients, gateways, and mesh router components. 27). The propagation technique in WSN between hops of network can be ________.RoutingFloodingConnectingBoth a and bHintThe propagation technique in WSN between hops of the network can be flooding and routing. 28). A process that selects paths for traffic in a network is called _______.RoutingFloodingConnectingBoth a and bHintA process that selects paths for traffic in a network is called routing. Read more about Routing Algorithm. 29). Routing is performed in _______ type of networks.Circuit-switchedPublic switched telephone networkComputer networkAll the aboveHintRouting is performed in 3 types of networks namely computer network, public switched telephone network, and circuit-switched. 30). PSTN in routing network stands for ________.Public switched telephone networkPublic serial telephone networkPublic serial telepathy networkNone of the aboveHintPSTN in routing network stands for the public switched telephone network. 31). Which of the following are the power sources used in WSN?ReVibe energyPerpetuumBoth a and bNone of the aboveHintPower sources used in WSN are Perpetuum and ReVibe energy. 32). Does WSN cope with if a node fails to function?YesNoMaybeHintYes, WSN copes, if a node fails to function. 33). Does WSN scaled to large-scale deployment?YesNoMaybeHintYes, WSN scaled to large-scale deployment. 34). Does WSN withstand in a harsh environment?YesNoMaybeHintYes, WSN can withstand in harsh environment. 35). Does WSN withstand has cross-layer optimization?YesNoMaybeHintYes, WSN withstand has cross-layer optimization. 36). Which of the following are the applications of cross-layer optimization?SchedulingAdaptionResource allocationAll the aboveHintThe applications of cross-layer optimization are scheduling, adaption, and resource allocation. 37). Which of the following are the characteristics of WSN?HeterogeneityHomogeneityEase of useAll the aboveHintThe characteristics of WSN are heterogeneity, homogeneity, and ease of use. 38). How many problems exits in traditional WSN?2315HintThere are 3 problems that exist in traditional WSN. 39). Does the traditional layer approach of WSN have ability to adapt to environmental changes?YesNoMaybeHintNo, a traditional layer approach of WSN does not have the ability to adapt to environmental changes. 40). Does the traditional layer approach of WSN applicable to wireless networks?YesNoMaybeHintNo, a traditional layer approach of WSN is not applicable to wireless networks. 41). Can the traditional layer approach of WSN share different information among different layers?YesNoMaybeHintNo, the traditional layer approach of WSN doesn't share different information among different layers. 42). Which type of layer can make optimal modulation to improve transmission performance in WSN?Cross layerTraditional layerBoth a and bNone of the aboveHintA cross-layer can make optimal modulation to improve transmission performance in WSN. 43). A cross-layer in WSN improves ________ factors.QoSData rateEnergy efficiencyAll the aboveHintA cross-layer in WSN improves 3 factors namely, QoS, data rate, and energy efficiency. 44). QoS in WSN stands for __________.Quality of serviceQuantity of serviceQuantity of softwareQuality of softwareHintQoS in WSN stands for the quality of service. 45). _________ can be imagined as small computers.Sensor nodesPower sourceDataNone of the aboveHintSensor nodes can be imagined as small computers. 46). A sensor node with a processing unit has ______ computational power.LimitedMinimumMaximum0HintA sensor node with a processing unit has limited computational power. 47). A sensor node with a processing unit has _______ memory.LimitedMinimumMaximum0HintA sensor node with a processing unit has limited memory. 48). A sensor node with a processing unit has _______ sensors.LimitedMinimumMaximum0HintA sensor node with a processing unit has limited sensors. 49). A sensor node with a processing unit has ______ MEMS.LimitedMinimumMaximum0HintA sensor node with a processing unit has limited MEMS,. 50). MEMS stands for _________.Micro electro-mechanical systemsMarco electro-mechanical systemsMedium electro-mechanical systemsNone of the aboveHintMEMS stands for Micro Electro Mechanical Systems.Wireless Sensor Network Exam Questions & Answers 51). Additional components of WSN are _________.ASICsRS232USBAll the aboveHintAdditional components of WSN are ASCIs, RS232, and USB. 52). ASIC stands for __________.Application specific integrated circuitApps specialized internal circuitApplication solo integrated circuitApplication specific internal circuit 53). ASIC is a _________.ICBoardChipBoth a and cHintASIC is an IC chip. 54). USB stands for _______.Universal serial busUni serial busUniversal step busNone of the aboveHintUSB stands for Universal serial bus. 55). USB a _______ type device.Plug-inWirelessWiredNone of the aboveHintUSB a plug-in type device. 56). RS232 stands for _______.Recommended standard 232Rational standard 232Relational standard 232None of the aboveHintRS232 stands for Recommended standard 232. 57). RS232 follows _____ type of communication.SerialParallelConcurrentBoth b and cHintRS232 follows a serial type of communication. 58). USB follows _____ type of communication.SerialParallelConcurrentBoth b and cHintUSB follows a serial type of communication. 59). WSN communicates with _____ via gateway.LANWANBoth a and bNone of the aboveHintWSN communicates with LAN and WAN via a gateway. 60). LAN stands for ________.Local area networkLarge area networkLevel area networkNone of the aboveHintLAN stands for Local Area Network. Read more about LAN. 61). WAN stands for ________.Wide area networkWide-area nodeWired area networkNone of the aboveHintWAN stands for wide area network. 62). A wireless WAN is used for ______ power device.HighLow0HintA wireless WAN is used for low-power device. 63). A low-power wireless device is called _______.LPWANWANLAANWANHintA low-power wireless device is called LPWAN. 64). LPWAN stands for ________.Low power wide area networkLarge power wide area networkLong power wide area networkNone of the aboveHintLPWAN stands for Low power wide area network. 65). WSN uses ______ to address self-configuration issue.AlgorithmsProtocolsBoth a and bNone of the aboveHintWSN uses protocols and algorithms to address the self-configuration issue. 66). Lifetime maximization is represented as ______ ratio.Energy/powerPower/energyPowerEnergyHintLifetime maximization is represented as the energy/power ratio. 67). WSN uses _______ routing mechanism.LNDIRLNDTow wayNone of the aboveHintWSN uses the LNDIR routing mechanism. 68). LNDIR stands for _______.Lightweight non increasing delivery latency interval routingLightweight non increasing delivery latency interval routingLayered weight non-increasing delivery latency interval routingNone of the aboveHintLNDIR stands for Lightweight nonincreasing delivery latency interval routing. 69). Which of the following OS implemented in WSN?Tiny OSeCosuC/OSAll the aboveHintThe OS implemented in WSN are Tiny OS, eCos, and uC/OS. 70). OS stands for _________.Operating systemOzone standardOperating standardNone of the aboveHintOS stands for operating system. 71). eCos stands for _________.Embedded configurable OSEmbedded communication OSEqual configurable OSNone of the aboveHinteCos stands for Embedded configurable OS. 72). uC/OS stands for ________.Micro controller OSMarco Controller OSMedium Controller OSNone of the aboveHintuC/OS stands for microcontroller OS. 73). uC/OS is a _________ OS.RTOSNon-RTOSNano OSNone of the aboveHintuC/OS is an RTOS. 74). RTOS stands for ________.Real-time OSReel time OSReady time OSNone of the aboveHintRTOS stands for Real-time OS. 75). RTOS was designed by ________.J. LabrosseHenryRichardBellHintRTOS was designed by J. Labrosse. 76). RTOS was designed by J. Labrosse in _______ year.1990199119921998HintRTOS was designed by J. Labrosse in 1991. 77). RTOS was written in _______ programming language.CJAVAC#HTMLHintRTOS was written in the C programming language.Wireless Sensor Network MCQs with Answers 78). WATS stands for ________.Wide area tracking systemWireless area tracking systemWired area tracking systemNone of the aboveHintWATS stands for Wide-area tracking system. 79). What is the purpose of WATS in WSN?Detects ground-based nuclear deviceDetects any deviceDetects frequencyDetects data collisionHintThe purpose of WATS in WSN is to detect ground-based nuclear devices. 80). WATS was developed at _______ lab.Lawrence live more national labLawrence international labLawrence lives more international labNone of the aboveHintWATS was developed at Lawrence live more national lab. 81). WATS is made up of ______ type sensors.GammaNeutronElectronBoth a and bHintWATS is made up of Gamma and Neutron-type sensors. 82). WATS uses ________ algorithm.Bayesian statisticsDistance vectorPoint to pointNone of the aboveHintWATS uses a Bayesian statistic algorithm. 83). WSN in wine production is used for ______ purposes.MonitoringCalculateDetectNone of the aboveHintWSN in wine production is used for monitoring purposes. 84). WSN in water monitoring application monitors _______ of water.QualityLevelSaves water wastageAll the aboveHintWSN in water monitoring application monitors quality, level and saves water from being wasted. 85). WSN in data logging ______ the data.CollectsMonitorsDistributesNone of the aboveHintWSN in data logging collects the data. 86). What is the advantage of WSN in loggers?Feed live dataFeeds any dataReads dataNone of the aboveHintThe advantage of WSN in loggers is to feed live data. 87). CBM stands for ________.Condition based maintenanceControlled based maintenanceCondition based monitorContinuous based maintenanceHintCBM stands for Condition based maintenance. 88). CBM is used in ______ application of WSN.Health monitoringData loggingStatistic calculationNone of the aboveHintCBM is used in the health monitoring application of WSN. 89). WSN can be placed in ______ type location.Rotating machineryUntethered vehiclesBoth a and bNone of the aboveHintWSN can be placed in untethered vehicles and rotating machinery-type locations. 90). WSN uses _______ modeling for social simulation.Agent-basedClient-basedBoth a and bNone of the aboveHintWSN uses agent-based modeling for social simulation. 91). Which of the following architecture of WSN possess weak security?Infrastructure less architectureInfrastructure architectureInfra -less architectureNone of the aboveHintInfrastructure less architecture of WSN possesses weak security. 92). Is security a big concern in WSN?YesNoMaybeHintYes, security a big concern in WSN. 93). OGC stands for ________.Open geospatial consortiumOpen geo consortiumOpen gravity consortiumNone of the aboveHintOGC stands for Open geospatial consortium. 94). Which process is used for safe communication in WSN?EncryptionDecryptionBoth a and bNone of the aboveHintBoth encryption and decryption process is used for safe communication in WSN. 95). Encryption in WSN is used on _______ side.TransmitterReceiverBoth a and bNone of the aboveHintEncryption in WSN is used on the transmitter side. 96). Decryption in WSN is used on _______ side.TransmitterReceiverBoth a and bNone of the aboveHintDecryption in WSN is used on the receiver side. 97). Does the encryption and decryption process use key?YesNoMaybeHintYes, the Encryption and decryption process uses a key. 98). Tree topology is also called as ________.Cascaded starStarUn-cascaded starNone of the aboveHintTree topology is also called a cascaded star. 99). The different types of WSN are _______.TerrestrialUndergroundUnderwaterAll the aboveHintThe different types of WSN are terrestrial, underground, and underwater. 100). The limitations of WSN are _______.Posses 8MHzWorks on batteriesProvides less storage spaceAll the aboveHintThe limitations of WSN are posses 8MHz, works on batteries, and provides less storage space. 101). What is the advantage of a wireless sensor network in industrial applications?Reduced deploymentFlexibility in installingMoving and rotating equipmentAll of the aboveHintThe advantages of a wireless sensor network in the industry are reduced deployment, flexibility in installing, moving, and rotating equipment. 102). What is the disadvantage of a wireless sensor network in industrial applications?Network delayMultipath fadingBoth a and bNoneHintThe disadvantages of a wireless sensor network in the industry are network delay and multipath fading. 103). What is the advantage of wireless sensor network in precision agriculture?Large crop area monitoringSoil moistureNutrition stressAll of the aboveHintThe advantages of a wireless sensor network in precision agriculture are large crop monitoring, forest fire-prevention, and biomass studies. 104). What is the disadvantage of a wireless sensor network in precision agriculture?Low battery lifeHigh hardware costsLimited bandwidthAll of the aboveHintThe disadvantages of a wireless sensor network in precision agriculture are low battery life, high hardware costs, and limited bandwidth. 105). What is the advantage of wireless sensor networks in health care?Monitoring in ambulatory settingEarly detection of abnormal conditionsBoth a and bNoneHintThe advantages of a wireless sensor network in health care are monitoring in an ambulatory setting and early detection of abnormal conditions. 106). What is the disadvantage of a wireless sensor network in health care?Cost maintenanceInsecurity of patientsBoth a and bNoneHintThe disadvantages of a wireless sensor network in health care are cost maintenance and insecurity of patients. 107). What is the advantage of wireless sensor networks in transportation?High accuracyMaintenanceFlexibilityAll of the aboveHintThe advantages of wireless sensor networks in transportation are high accuracy, maintenance, and flexibility. 108). What is the disadvantage of wireless sensor networks in transportation?ConnectivityCostCongestionAll of the aboveHintThe disadvantages of wireless sensor networks in transportation are connectivity, cost, and congestion. 109). What is the advantage of wireless sensor networks in environmental monitoring?Detect Forest firesObtain changes in temperatureObtain changes in humidityAll of the aboveHintThe advantages of a wireless sensor network in environment monitoring are, detecting forest fires, obtain the changes in temperature and humidity. 110). What is the disadvantage of a wireless sensor network in environmental monitoring?Biofouling problemData securityBoth a and bNoneHintThe disadvantages of a wireless sensor network in environmental monitoring are the biofouling problem in the marine environment and security of data. Time is Up!