IOT(Internet of Things) Multiple choice Questions and Answers

IOT(Internet of Things) Multiple choice Questions and Answers 

1. Choose the correct option based on the following two statements on the HART Physical Layer.
Statement-I: It is derived from the IEEE 802.15.4 protocol.
Statement-II: It operated only in the 2.4 GHz ISM band.

A) Statement-I True and Statement-II False
B) Statement-I False and Statement-II True
C) Both Statements I and II are False
D) Both Statements I and II are True

ANSWER= (D) Both Statements I and II are True

 

2. Which of the following characteristic of HART Data Link Layer helps to increase reliability and security?

A) Channel Hopping and Channel Blacklisting
B) Channel Crunching and Jamming
C) Scattering
D) All of these

ANSWER= (A) Channel Hopping and Channel Blacklisting

 

3. State True or False
Statement: Channel blacklisting in HART identifies channels consistently affected by interference and removes them from use.

A) True
B) False

ANSWER= (A) True

 

4. At the MAC layer –
Statement-I: WirelessHART utilizes Time Division Multiple Access (TDMA).
Statement-II: ZigBee applies Carrier Sense Multiple Access with Collision Detection (CSMA/CD).

A) Statement-I True and Statement-II False
B) Statement-I False and Statement-II True
C) Both Statements I and II are False
D) Both Statements I and II are True

ANSWER= (D) Both Statements I and II are True

 

5. NFC works on the principal of

A) Pressure
B) Magnetic Induction
C) Both (a) and (b)
D) None of these

ANSWER= (B) Magnetic Induction

 

6. Bluetooth technology is based on Ad-hoc technology also known as?

A) Ad-hoc Piconets
B) Ad-hoc Micronets
C) Ad-hoc Nanonets
D) None of these

ANSWER= (A) Ad-hoc Piconets

 

7. Class 2 Bluetooth radios have a range of about?

A) 1 m
B) 2 m - 5 m
C) 10 m
D) None of these

ANSWER= (C) 10 m

 

8. Which of the following is NOT a phase in Bluetooth connection establishment?

A) Inquiry
B) Booking
C) Paging
D) Connection

ANSWER= (B) Booking

 

9. Zwave can support ___________ number of nodes in a network?

A) 232
B) 233
C) 234
D) 235

ANSWER= (A) 232

 

10. Topologies allowed in ISA 100.11A are?

A) Ring Only
B) Mesh and Hybrid
C) Mesh and Ring
D) Mesh and Star/Tree

ANSWER= (D) Mesh and Star/Tree

 

11. An example of an Operating System (OS) that a sensor node can have is?

A) MicronOS
B) TinyOS
C) Both (a) and (b)
D) None of these

ANSWER= (B) TinyOS

 

12. Which of the following is NOT a constraint on sensor nodes?

A) Must consume extremely low power
B) Be non-autonomous
C) Be adaptive to environment
D) None of these

ANSWER= (B) Be non-autonomous

 

13. Nodes in WSNs that exhibit features of failed nodes but they can also send false routing messages which are a threat to the integrity of the network are called?

A) Normal Nodes
B) Badly Failed Nodes
C) Failed Nodes
D) Selfish Nodes

ANSWER= (B) Badly Failed Nodes

 

14. Which of the following are the two popular schemes to re-establish the connectivity between dumb nodes with others?

A) CoARD and CoRD
B) CoRAD and CoARD
C) CoRD and CoRAD
D) None of these

ANSWER= (C) CoRD and CoRAD

 

15. Full form of WBAN is?

A) Wireless Body Area Network
B) Wirelessed Body Area Network
C) Wireless Bodily Area Network
D) None of these

ANSWER= (A) Wireless Body Area Network

IOT(Internet of Things) Multiple choice Questions and Answers

IOT(Internet of Things) Multiple choice Questions and Answers 

1. Which of the following handles packets, paging and inquiry in Bluetooth?

A) L2CAP
B) Baseband
C) RFComm
D) Physical Radio

ANSWER= (B) Baseband

 

2. Which of the following incorporates channel hopping after every packet transmission?

A) Zigbee
B) WirelessHART
C) 6LoWPAN
D) None of these

ANSWER= (B) WirelessHART

 

3. In “X” protocol, a central network controller device sets‐up a network with 1 Network ID and multiple node IDs for the devices in it. The nodes with different Network IDs cannot communicate with each other. What is “X”?

A) Z-wave
B) Zigbee
C) Bluetooth
D) ISA 100.11A

ANSWER= (A) Z-wave

 

4. In the context of Sensor Web, SensorML stands for _____________.

A) Sensor Modeling language
B) Sensor Machine language
C) Sensor Markup language
D) None of the above

ANSWER= (A) Sensor Modeling language

 

5. Which of the following protocol is best suited to provide interference-free communication while minimizing latency and ensuring quality of service?

A) WirelessHART
B) ISA100.11A
C) Both WirelessHART and ISA100.11A
D) None of these

ANSWER= (B) ISA100.11A

 

6. Which of the following solution approach is used to overcome the limitation of ineffective wakeup and sensing under rare event monitoring scenario in social sensing?

A) Duty-cycle management
B) Sleep-cycle management
C) Packet transmission management
D) Both duty-cycle and sleep-cycle management

ANSWER= (A) Duty-cycle management

 

7. Which of the following technique Bluetooth master uses to avoid collisions during transmission in a Piconet?

A) Frequency Division Multiplexing
B) Frequency Hopping Spread Spectrum
C) Time Division Multiplexing
D) Direct Sequence Spread Spectrum

ANSWER= (C) Time Division Multiplexing

 

8. Which of the following limitation is faced by total co-operation in Wireless Ad Hoc and Sensor Networks?

A) Decreasing network throughput
B) Decreasing energy
C) Both (a) and (b)
D) No limitation exists

ANSWER= (B) Decreasing energy

 

9. Which of the following can function over a reliable packet transfer protocol?

A) L2CAP
B) Service Discovery Protocol
C) RFComm
D) Physical Radio

ANSWER= (B) Service Discovery Protocol

 

10. In which of the following mode, NFC devices can act as both readers as well as tags?

A) Reader/writer
B) P2P
C) Emulation
D) NFC devices can’t act as both readers as well as tags

ANSWER= (C) Emulation

 

11. In WSN, Information theoretic self‐management (INTSEM) controls the transmission rate of a node by adjusting a node’s ____________.

A) Duty cycle
B) Lifetime
C) Sleep time
D) Can’t control the transmission rate

ANSWER= (C) Sleep time

 

12. Which of the following layer of ISA 100.11A supports mesh routing?

A) Network layer
B) Data link layer
C) Transport layer
D) MAC layer

ANSWER= (B) Data link layer

 

13. Which of the following is used to avoid interference-prone channels in HART?

A) Channel blacklisting
B) Channel switching
C) Channel hopping
D) Super-frames

ANSWER= (B) Channel switching

 

14. When the devices are not in range, messages are routed through different nodes to bypass obstructions created by household appliances or layouts. Which of the following exhibit such characteristic of avoiding radio dead-spots?

A) Bluetooth
B) 6LoWPAN
C) Z-wave
D) Zigbee

ANSWER= (C) Z-wave

 

15. Which of the following is TRUE in terms of power (in mW) and range (in m) of the classes of Bluetooth devices?

A) Class-1: Power=100mW, Range=100m
B) Class-2: Power=2.5 mW, Range=100m
C) Class-1: Power=2.5 mW, Range=100m
D) Class-2: Power=100 mW, Range=100m

ANSWER= (A) Class-1: Power=100mW, Range=100m

IOT(Internet of Things) Multiple choice Questions and Answers

IOT(Internet of Things) Multiple choice Questions and Answers 

1. In general, Z-wave protocol for communication among devices is used for_________ .

A) Topology management
B) Home automation
C) Network configuration
D) None of the above

ANSWER= (B) Home automation

 

2. Which of the following characteristic of HART Data Link Layer helps it to achieve collision-free and deterministic communication?

A) Super-frames
B) Channel hopping
C) Channel blacklisting
D) All of the above

ANSWER= (A) Super-frames

 

3. Which of the following is the basis for Bluetooth technology?

A) Ad-hoc piconets
B) Ad-hoc technology
C) Both (a) and (b)
D) None of the above

ANSWER= (C) Both (a) and (b)

 

4. Which of the following protocol uses healing (message) to bypass radio dead-spots?

A) HART
B) NFC
C) Z-wave
D) None of the above

ANSWER= (C) Z-wave

 

5. Which of the following nodes send false routing messages in the network?

A) Bad nodes
B) Badly failed nodes
C) Failed nodes
D) All of the above

ANSWER= (B) Badly failed nodes

 

6.Which of the following layers provide multiplexing capability in Bluetooth technology?

A) L2CAP
B) RFComm
C) SDP
D) Baseband

ANSWER= (A) L2CAP

 

7. Which of the following component can be considered as optional for a sensor node?

A) Sensing unit
B) Transceiver
C) Location finding unit
D) None of the above

ANSWER= (C) Location finding unit

 

8. Which of the following provide energy to peer-to-peer tags?

A) Reader
B) Own power source
C) Both (a) and (b)
D) Doesn’t require energy

ANSWER= (B) Own power source

 

9. Which of the following schemes re-establish the connectivity between dumb nodes with others?

A) CoRD
B) CaRAD
C) Both (a) and (b)
D) None of the above

ANSWER= (C) Both (a) and (b)

 

10. Which layer of Bluetooth handles paging?

A) L2CAP
B) RFComm
C) SDP
D) Baseband

ANSWER= (D) Baseband

 

11. In general, is it advisable to increase the duty cycle of a node in case of rare events for social sensing?

A) Yes
B) No
C) NotApplicable

ANSWER= (B) No

 

12. Is Zigbee Pro compatible with Zigbee RF4CE?

A) Yes
B) No
C) NotApplicable

ANSWER= (B) No

 

13. Which of the following is True?

A) Scatternet is a subset of Piconet
B) Piconet is a subset of Scatternet
C) Adevice can be a master in more than one piconet
D) Apiconet can have maximum of 10 scatternets

ANSWER= (B) Piconet is a subset of Scatternet

 

14. Which of the following suffers in case of total co-operation in wireless ad hoc and sensor networks?

A) Network delay
B) Network throughput
C) Node’s lifetime
D) All of the above

ANSWER= (C) Node’s lifetime

 

15. Does ISA100.11Asupport tunneling mode?

A) Yes
B) No

ANSWER= (A) Yes