Top 350+ Solved Wireless Sensor Networks (WSN) MCQ Questions Answer
Q. Receiving power additionally influenced by
a. fading (frequency dependent) & shadowing
b. reflection & refraction depending on the density
c. scattering & diffraction
d. all of above
Q. Incorrect statement about Time and frequency multiplexing in combination is
a. better protection against tapping
b. protection against frequency selective interference
c. higher data rates compared to code multiplex
d. no precise coordination required
Q. in case of hidden terminal problem
a. two senders are in the communication range of each other
b. two senders are not in the communication range of each other
c. independent of sender range
d. none of the above
Q. in case of exposed terminal problem
a. two senders are in the communication range of each other
b. two senders are not in the communication range of each other
c. independent of sender range
d. two receivers are in the communication range of each other
Q. Throughput is defined as the number of bits or bytes successfully
a. received per time unit t
b. lost per time unit t
c. transmitted per time unit t
d. retransmitted per time unit t
Q. Design Criteria for Medium Access Protocols
a. maximize the throughput by minimizing the delay and energy spent.
b. maximize the throughput by maximize the delay and minimizing energy spent.
c. minimize the throughput by minimizing the delay and energy spent.
d. maximize the throughput by maximize the delay and energy spent.
Q. Design Criteria for Medium Access Protocols
a. maximize the throughput by maximize the delay and energy spent.
b. to minimize the time in listening mode as much as possible.
c. to maximize the time in listening mode as much as possible.
d. avoid the switched off devices handling
Q. Microcontroller has current drawn typically of 1.8 mA and 5.1 µA respectively in
a. active mode and sleep mode
b. sleep mode and active mode
c. ideal mode and active mode
d. sleep mode and ideal mode
Q. RF Transceiver draws more current in
a. sleep mode
b. receive mode
c. transmit mode
d. search mode
Q. In centralized TDMA,
a. the schedule is calculated online and provided when required
b. the schedule is calculated offline and provided to the sensor nodes at startup.
c. the schedule is calculated offline and provided when required
d. the schedule is calculated online and provided when after regular interval of time
Q. When a node has a packet to send, it listens for traffic on the channel.
a. if the channel is free, it initially sends message, cts.
b. if the channel is free, it initially waits for message, cts.
c. if the channel is free, it initially sends message, rts.
d. if the channel is free, it initially waits for message, rts.
Q. If the channel is busy, continues sensing the channel until it becomes idle again.
a. 1-persistent csma
b. non-persistent csma
c. p-persistent csma
d. o-persistent csma
Q. If the channel is busy, it back-offs for a random amount of time and then retries.
a. 1-persistent csma
b. non-persistent csma
c. p-persistent csma
d. o-persistent csma
Q. This version is time scheduled. A central controller in the network assigns a fixed transmission order
a. 1-persistent csma
b. non-persistent csma
c. p-persistent csma
d. o-persistent csma
Q. An inherent problems with S-MAC is
a. it does not allow sensor nodes to sleep for extensive amounts of time.
b. internal clocks are not present.
c. the internal clock of the nodes are not synchronized.
d. the internal clock of the nodes are synchronize