IOT Questions and Answers

1.QoS guarantees in WSNs include
a) Offering guarantees in terms of bandwidth, delay, jitter
b) Offering guarantees in terms of packet loss probability.
c) Offering guarantees in terms of Limited bandwidth, unpredictable changes in RF channel characteristics.
d) All of these
Answer: All of these

2. The WSN nodes are prone to
a) Malicious attacks
b) Eavesdropping
c) Interference
d) All of these
Answer: All of these

3. With respect to WSN coverage problems, the OGDC algorithm is an acronym for
a) Optimal Geographic Density Control
b) Optimal Geographic Distance Control
c) Optimal Geographic Distance Coverage
d) Optimal geographic Density Coverage
Answer: Optimal Geographic Density Control

4. A crossing with respect to WSN coverage is _ if it is in the interior region of at least one node’s coverage disk.
a) Partially covered
b) Covered
c) Not covered
d) Isolated
Answer: Covered

5. A PIR Sensor stands for
a) Proximity Infra-Red
b) Passive Infra-Red
c) Picture Infra-Red
d) None of these
Answer: Passive Infra-Red

6. WMSNs stand for
a) Wired Multimedia Sensor Networks
b) Wireless Multimedia Sensor Networks
c) Wireless Mobile Sensor Networks
d) Wireless Machine Sensor Network
Answer: Wireless Multimedia Sensor Networks

7. UAV-VANETS link-up may be used for
a) visual guidance
b) Data-muling
c) Coverage enhancement
d) All of these
Answer: All of these

8. M2M stands for
a) MAC to MAC communication
b) Machine to MAC communication
c) Machine to machine communication
d) MAC to machine communication
Answer: Machine to machine communication

9. In WSN area coverage problem, which is TRUE?
a) Energy-efficient random coverage
b) Connected random coverage
c) A network is connected if any active node can communicate with any other active nodes
d) All of these
Answer: All of these

10. In a M2M ecosystem, Internet service providers
a) Provide their infrastructures for M2M device communications.
b) are responsible for devices providing raw data.
c) is an individual or company what utilizes M2M applications.
d) None of these
Answer: Provide their infrastructures for M2M device communications.

11. With respect to stationary sensor networks, which of these points apply?
a) Easy deployment
b) Node can be placed in an optimized distance
c) Easy topology maintenance
d) All of these
Answer: All of these

12. High-end M2M nodes have
a) Mobility
b) QoS guarantees
c) Low density deployment
d) All of these
Answer: All of these

13. A hardware code, before uploading to an embedded processor board first needs to be
a) Verified and compiled
b) Executed
c) Both a and b
d) None of these
Answer: Verified and compiled

14. Why interoperability is required?
a) Heterogeneous wireless communication protocols
b) Different programming languages
c) Different control models
d) All of the above
Answer: All of the above

15. What is the function for reading humidity from DHT sensor from Arduino?
a) dht.readHumidity()
b) dht.readTemperature()
c) dht.begin()
d) dht(pin,DHT22)
Answer: dht.readHumidity()

16. Device interoperability problem is between
a) Two devices
b) A device and an user
c) Both (a) and (b)
d) None of the above
Answer: Two devices

17. Which is the following is not an Actuator?
a) Servo motor
b) Stepper motor
c) DHT
d) Relay
Answer: DHT

18. Which of the following is not a sensor?
a) Barometer
b) Light Dependent Resistor (LDR)
c) DHT
d) Relay
Answer: Relay

19. What is the servo library command to move the shaft of Servo motor back and forth across 180 degree?
a) Knob()
b) Sweep()
c) write()
d) detach()
Answer: Sweep()

20. The code written in Arduino IDE is referred to as
a) Script
b) Block
c) Sketch
d) Arduino Script
Answer: Sketch

21. Which of the following library functions can be used to generate a random number in Arduino?
a) randomize()
b) ran()
c) rand()
d) random()
Answer: random()

22. Which pin of Arduino should be connected with the pin 3 of the DHT sensor?
a) Pint 5V
b) Pin 3.3V
c) Pin GND
d) None of the these
Answer: None of the these

23. By default, the GPIO pins in Raspberry Pi are configured as?
a) Input except pins 14 and 15
b) Output except pins 14 and 15
c) Bcm
d) GPIO
Answer: Input except pins 14 and 15

24. Which of the following datatype is correct for the object below?
D = [‘python’, 3.43, ‘p’, 100]
a) Array
b) Dictionary
c) Tuple
d) List
Answer: Dictionary

25.What does the method readline() return
a) One line
b) One byte
c) One character
d) Bool
Answer: One line