This set of MCQ(multiple choice questions) focuses on the Introduction To Internet Of Things NPTEL Week 2 Solutions.
Course layout (All week answers link)
Week 0
Week 1: Introduction to IoT
Week 2: Basics of Networking
Week 3: Communication Protocols
Week 4: Sensor Networks
Week 5: Interoperability in IoT
Week 6: Introduction to Python programming
Week 7: Implementation of IoT with Raspberry Pi (contd), Introduction to SDN, SDN for IoT
Week 8: SDN for IoT (contd), Data Handling and Analytics, Cloud Computing
Week 9: Cloud Computing(contd), Sensor-Cloud
Week 10: Fog Computing, Smart Cities and Smart Homes
Week 11: Connected Vehicles, Smart Grid, Industrial IoT
Week 12: Industrial IoT (contd), Case Study: Agriculture, Healthcare, Activity Monitoring
NOTE: You can check your answer immediately by clicking show answer button. Moreover, this set of “Introduction To Internet Of Things NPTEL Week 2 Solution” contains 15 questions.
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Introduction To Internet Of Things NPTEL Week 2 Solutions
Q1. The full form of MQTT is
a) Message Queue Telemetry Transport
b) Message Query Telemetry Transport
c) Message Queue Telemedicine Transport
d) None of these
Answer: a) Message Queue Telemetry Transport
Q2. In MQTT, a ________________ controls the publish-subscribe messaging pattern.
a) Publishers
b) Message Broker
c) Subscribers
d) All of these
Answer: b) Message Broker
Q3. Which of the following is NOT a component of MQTT?
a) Publishers
b) Users
c) Brokers
d) None of these
Answer: b) Users
Q4. ______________ is an extension of MQTT which uses lightweight attribute based encryption. It has ___________ main stages.
a) SMQTT, three
b) BMQTT, three
c) SMQTT, four
d) None of these
Answer: c) SMQTT, four
Q5. Which of the following is based on Request-Response model between end-points?
a) MQTT
b) CoAP
c) Both a) and b)
d) Neither a) nor b)
Answer: b) CoAP
Q6. The two sub-layers of CoAP are –
a) Messaging and Holding
b) Messaging and Backoff
c) Messaging and Teardown
d) Messaging and Request/response
Answer: d) Messaging and Request/response
Q7. Which of the following is used for real-time exchange of structured data?
a) MQTT
b) SMQTT
c) XMPP
d) CoAP
Answer: c) XMPP
Q8. XMPP uses the ________________ architecture.
a) Publish-subcscribe
b) Client-server
c) Both a) and b)
d) Neither a) nor b)
Answer: b) Client-server
Q9. With respect to AMQP, which of the following message delivery guarantees allow for each message to be delivered certainly as well as to be delivered multiple times.
a) At-least-once
b) At-most-once
c) Exactly-once
d) Both a) and b)
Answer: a) At-least-once
Q10. Which of the following is/are NOT an AMQP frame type?
a) Open
b) Close
c) End
d) None of these
Answer: d) None of these
Q11. Which of the following is/are NOT the function/functions of the Bindings component of the AMQP protocol?
a) Receives messages and routes them to queues
b) Separate queues for separate business process
c) Consumer receive messages from queues
d) All of these
Answer: d) All of these
Q12. Which of the following is/are NOT exchange types in AMQP?
a) Direct
b) Indirect
c) Fan-out
d) Topic
Answer: b) Indirect
Q13. State whether the following statement is True or False. Statement: The IEEE 802.15.4 is a well-known standard for low data-rate Wireless Personal Area Network (WPAN).
a) True
b) False
Answer: a) True
Q14. The networking topologies supported in the IEEE 802.15.4 are –
a) Only Star
b) Star and Mesh
c) Only Mesh
d) None of these
Answer: b) Star and Mesh
Q15. State whether the following statement is True or False. Statement: Periodic transmission of beacon messages does not occur in beacon enabled networks (IEEE 802.15.4).
a) False
b) True
Answer: a) False
Introduction To Internet Of Things NPTEL 2022 Week 2 Solutions
Q1. Which of the following is based on the publish-subscribe model?
a) MQTT
b) HTTP
c) HTTPS
d) All of these
Answer: a) MQTT
Q2. In MQTT, a topic to which a client is subscribed is updated in the form of messages and distributed by the _________________?
a) Publishers
b) Message Broker
c) Subscribers
d) All of these
Answer: b) Message Broker
Q3. Which of the following is used when more than one level needs to be subscribed, such as the entire sub-tree, i,e., a multilevel wildcard?
a) /
b) +
c) #
d) None of these
Answer: b) +
Q4. The CoAP protocol is designed for –
a) Heavy Web Application
b) Publish-Subscribe Applications
c) Machine-to-Machine (M2M) applications
d) Both a) and b)
Answer: c) Machine-to-Machine (M2M) applications
Q5. Statement I – The messaging sub-layer of CoAP, is responsible for reliability and duplication of messages.
Statement II – The request/response sub-layer is responsible for communication.
Which of the above statement/s is/are correct?
a) Only Statement I
b) Only Statement II
c) Both Statement I and II
d) Statement I Correct but Statement II Incorrect
Answer: c) Both Statement I and II
Q6. Which of the following is a messaging mode in CoAP?
a) Append
b) Substitute
c) Attempt
d) Separate
Answer: d) Separate
Q7. Which of the following provides for the discovery of services residing locally or across a network?
a) Internet
b) SMQTT
c) XMPP
d) CoAP
Answer: c) XMPP
Q8. AMQP is a protocol of which layer?
a) Transport Layer
b) Application Layer
c) Network Layer
d) Session Layer
Answer: b) Application Layer
Q9. Which of the following is NOT a feature of the AMQP protocol?
a) Closed Standard
b) Security
c) Reliability
d) Routing
Answer: a) Closed Standard
Q10. There are a total of __________ number of AMQP frame types are defined that are used to initiate, control, and tear down the transfer of messages between two peers.
a) Seven
b) Eight
c) Nine
d) None of these
Answer: c) Nine
Q11. The function/s of the Queue component of the AMQP protocol is/are –
a) Receive messages and route them to queues
b) Separate queues for separate business process
c) Consumer receive messages from queues
d) Both b) and c)
Answer: d) Both b) and c)
Q12. Which of the following statement is/are false?
Statement – I: IEEE 802.15.4 is a well-known standard for low data-rate Wireless Personal Area Network (WPAN)
Statement – II: IEEE 802.15.4 standard operates in the ISM band.
a) Statement – II
b) Statement – I
c) Both Statement I and II
d) None of these
Answer: d) None of these
Q13. The IEEE 802.15.4 establishes functionalities in which layers?
a) Application and Session Layers
b) Transport and Data Link Layers
c) Network and Session Layers
d) Physical and Data Link Layers
Answer: d) Physical and Data Link Layers
Q14. Which is not a purpose of the ZigBee Device Object (ZDO)?
a) Device Management
b) Interfacing and Control Services
c) Security
d) Policies
Answer: b) Interfacing and Control Services
Q15. State whether the following statement is True or False.
Statement: Similar to traditional barcodes and QR codes, RFID tag data cannot be read outside the line-of-sight.
a) False
b) True
Answer: a) False
Previous year – Introduction To Internet Of Things NPTEL Week 2 Solutions
Q1. Which of the following protocol is used to implement device management for mobile devices?
a) OMA-DM
b) Websocket
c) Alljoyn
d) DNS-SD
Answer: a) OMA-DM
Q2. In LOADng, can intermediate routers respond to Route Requests (RREQs)?
a) Yes, in any case
b) Yes, only when RREQ flooding occurs
c) Yes, only if they have active routes to the sought destination
d) No
Answer: d) No
Q3. Which of the following functions as the network bridge in IEEE 802.15.4 network?
a) PAN Coordinator
b) Router
c) Device
d) None of these
Answer: a) PAN Coordinator
Q4. Which of the following allow communication between Zigbee and no-Zigbee devices?
a) layer-5 application-level bridge
b) layer-7 application-level gateway
c) layer-7 application-level bridge
d) layer-5 application-level gateway
Answer: b) layer-7 application-level gateway
Q5. Statement I: RFIDs are radio-frequency-based.
Statement II: RFID devices can act as both readers as well as tags.
Which one of the following is correct?
a) Statement I is true but Statement II is false
b) Statement I is false but Statement II is true
c) Both the statements are true
d) Both the statements are false
Answer: a) Statement I is true but Statement II is false
Q6. In AMQP, which of the following functionality defines its component “exchange”?
a) linkage between various queues
b) receives messages from various queues
c) defines rules for message routing to various queues
d) routing the messages to various queues
Answer: d) routing the messages to various queues
Q7. Which of the following is designed to have low overhead and better scalability in terms of dense networks?
a) LOADng
b) RPL
c) Both LOADng and RPL
d) AODV
Answer: b) RPL
Q8. Which of the following AMQP frame type controls the message flow rate?
a) Transfer
b) Flow
c) Control
d) Disposition
Answer: b) Flow
Q9. Does 6LoWPAN allow interoperability between IEEE802.15.4-based wireless devices and other IP-based devices?
a) Yes
b) No
Answer: a) Yes
Q10. In the context of XMPP, which of the following correctly defines BOSH?
a) XML streaming
b) HTTP binding
c) Both XML streaming and HTTP binding
d) Binary encoding
Answer: b) HTTP binding
Q11. Does MQTT support event-driven architecture?
a) Yes
b) No
Answer: a) Yes
Q12. Which of the following is the acronym for “Extensible Messaging and Presence Protocol”?
a) EMPP
b) XMLP
c) XMPP
d) XMP
Answer: c) XMPP
Q13. An IoT network requires communication mechanism, which is capable of synchronous as well as asynchronous communication. The mechanism should support both request-response, as well as publish-subscribe models. Which of the following protocol would be best suited for such a mechanism?
a) AMQP
b) CoAP
c) MQTT
d) None of these
Answer: b) CoAP
Q14. Which of the following technique is used to transmit data frames in Beacon-enabled IEEE 802.15.4 networks?
a) unslotted CSMA/CA
b) slotted CSMA/CA
c) unslotted CSMA/CD
d) slotted CSMA/CD
Answer: b) slotted CSMA/CA
Q15. What is the maximum size of hop limit in 6LoWPAN packet format?
a) 8-bit unsigned integer
b) 16-bit unsigned integer
c) 8-bit signed integer
d) 16-bit signed integer
Answer: a) 8-bit unsigned integer
Previous Course – Week 2 Solutions
Q1. Which of the following is NOT a data and communication protocol?
a) MQTT
b) AMQP
c) Websocket
d) Alljoyn
Answer: d) Alljoyn
Q2. Which of the following AMQP frame type is used to inform the changes in state of transfer?
a) Flow
b) Disposition
c) Transfer
d) State
Answer: b) Disposition
Q3. Which of the following is NOT a messaging mode of CoAP?
a) Separate
b) Pager
c) Piggyback
d) Confirmable
Answer: b) Pager
Q4. The Zigbee Component “APS” stands for ____________.
a) Application Support Sub-layer
b) Application Protocol Support
c) Application Policy Support
d) Application Protocol Sub-layer
Answer: a) Application Support Sub-layer
Q5. Does IEEE 802.15.4 support IPv6 multicast?
a) Yes
b) No
c) Not Applicable
Answer: b) No
Q6. In MQTT, a ___________ subscribes to a topic.
a) client
b) broker
c) publisher
d) All of the above
Answer: a) client
Q7. Which of the following is a characteristic of XMPP protocol?
a) No interoperability
b) Closed standards
c) No central server
d) All of the above
Answer: c) No central server
Q8. Which of the following protocol has a component named “bindings”?
a) XMPP
b) AMQP
c) CoAP
d) None of the above
Answer: b) AMQP
Q9. Is CoAP RESTful?
a) Yes
b) No
c) Not Applicable
Answer: a) Yes
Q10. RPL routing is based upon __________________ routing protocol.
a) Enhanced Interior Gateway
b) Interior Gateway
c) Open Shortest Path First
d) Distance vector IPv6
Answer: d) Distance vector IPv6
Q11. In general, SMQTT algorithm includes which of the following stages?
a) Publish, decryption & subscribe
b) Encryption, publish, decryption & subscribe
c) Setup, encryption, publish & decryption
d) None of the above
Answer: c) Setup, encryption, publish & decryption
Q12. Which of the following modulation technique is used by high data rate versions of IEEE 802.15.4?
a) BPSK
b) QPSK
c) O-QPSK
d) DQPSK
Answer: c) O-QPSK
Q13. The piggyback messaging mode in CoAP Request-Response Model has a “wait” period. Is the statement true?
a) Yes
b) No
c) Not Applicable
Answer: b) No
Q14. Which of the following wildcard allows arbitrary values for one hierarchy in MQTT topics?
a) /
b) +
c) #
d) None of the above
Answer: b) +
Q15. IEEE 802.15.4 operates in _____________ band.
a) LLC
b) SSCS
c) ISS
d) ISM
Answer: d) ISM
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