Wireless Sensor Networks Wsn Set 11

Electronics and Telecommunication Engineering [ENTC]

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This set of Wireless Sensor Networks (WSN) Multiple Choice Questions & Answers (MCQs) focuses on Wireless Sensor Networks Wsn Set 11

Q1 | Which of the following is not the job of IEEE 802.15.4 MAC standard
  • channel acquisition
  • data transparency
  • nic address
  • error correction
Answer: data transparency
Q2 | Which of the following is the job of IEEE 802.15.4 PHY standard
  • channel acquisition
  • contention management
  • power management
  • error correction
Answer: power management
Q3 | Size of guard band is larges in case of ____________
  • 2.4ghz ism band
  • 915mhz ism band
  • european 868mhz band.
  • same in all cases
Answer: 2.4ghz ism band
Q4 | Following device class is able to be a Network coordinator
  • full function device (ffd)
  • reduced function device (rfd)
  • both are capable
  • any of them can not be
Answer: full function device (ffd)
Q5 | Following device class is able to talk to any other device
  • full function device (ffd)
  • reduced function device (rfd)
  • both are capable
  • none of above
Answer: full function device (ffd)
Q6 | Select correct statement about Full function device (FFD)
  • limited to star topology
  • cannot become a network coordinator
  • talks only to a network coordinator
  • can be used in star, tree and mesh topology
Answer: can be used in star, tree and mesh topology
Q7 | Select correct statement about Reduced function device (RFD)
  • can be used in tree topology
  • talks to network coordinator only
  • talks to any other device
  • capable to be a network coordinator
Answer: talks to network coordinator only
Q8 | Device class of Full function device (FFD) is used in
  • star topology only
  • tree topology only
  • mesh topology only
  • any of the above topology
Answer: any of the above topology
Q9 | In 802.15.4 standard Beacon frames are transmitted by coordinator
  • at the start
  • periodically
  • randomly
  • when new device detected
Answer: periodically
Q10 | The date available from sensor node is of type
  • periodic data
  • intermittent data
  • repetitive low latency data
  • a and b both
Answer: periodic data
Q11 | Select incorrect statement about ZigBee standard.
  • zigbee is a low-power, low data rate
  • zigbee is a low data rate, and close proximity
  • less expensive than other wpans
  • limits transmission distances to 1–10 km beyond line of sight,
Answer: limits transmission distances to 1–10 km beyond line of sight,
Q12 | Select correct statement.
  • zigbee standard is a low-power, high data rate
  • zigbee standard s a low data rate, and wide area coverage
  • zigbee is most expensive than other wpans
  • zigbee limits transmission distances to 10–100 meters, in line of sight,
Answer: zigbee limits transmission distances to 10–100 meters, in line of sight,
Q13 | Following is not the function of ZigBee used with IEEE 802.15.4 standard
  • network routing
  • address translation
  • channel acquisition
  • packet segmentation
Answer: channel acquisition
Q14 | Number of nodes possible with ZigBee network are
  • 10
  • 100
  • 1024
  • 64000
Answer: 64000
Q15 | Date rate of 250 kbps is maximum for ________ technology.
  • bluetooth
  • zigbee
  • ieee 802.11
  • a and b both
Answer: zigbee
Q16 | Life of ZigBee devices w.r.t. power consumption is in ________
  • hours
  • days
  • years
  • 4 weeks
Answer: years
Q17 | Range of ZigBee standard devices is
  • 1- 10 meters
  • 50- 100 meters
  • cms to 1 meter
  • 100-500 meters
Answer: 50- 100 meters
Q18 | Low data rate standard used for WPAN is
  • ieee 802.15.1
  • ieee 802.15.4
  • ieee 802.15.3
  • ieee 802.11
Answer: ieee 802.15.4
Q19 | High data rate standard used for WPAN is
  • ieee 802.15.1
  • ieee 802.15.4
  • ieee 802.15.3
  • ieee 802.11
Answer: ieee 802.15.3
Q20 | ZigBee 915 MHz ISM band has data rate of
  • 20kbps
  • 40kbps
  • 250bps
  • all of above
Answer: 40kbps
Q21 | ZigBee 868 MHz band has data rate of
  • 20kbps
  • 40kbps
  • 250bps
  • all of above
Answer: 250bps
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