This set of IOT Interview Questions and Answers focuses on “IoT Architecture for Precision Agriculture”.
1. Which protocol is used to link all the devices in the IoT?
a) TCP/IP
b) Network
c) UDP
d) HTTP
View Answer
Explanation: The internet of Thing is the global system of interconnected computer networks that use the Internet Protocol suite (TCP/IP) to link billions of devices worldwide.
2. ________ enables seamless integration of LoWPAN devices with internet leveraging.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN
View Answer
Explanation: IETF 6LoWPAN enables seamless integration of LoWPAN devices with internet leveraging IPv6 large address space and appln. Layer protocol reuse.
3. ________ enables open application layer for constrained nodes.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN
View Answer
Explanation: IETF CoAP – open application layer specification for constrained nodes supporting HTTP and Web integration.
4. ________ tags, devices, smart phones useful in identification.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN
View Answer
Explanation: RFID/NFC – tags, devices, smart phones useful in product / object identification and gathering associated information.
5. ________ supports low energy radio operation.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) Bluetooth
View Answer
Explanation: Bluetooth SMART devices support low energy radio operations like, heart rate monitors, blood glucose monitors suitable for health care and fitness etc.
6. ________ specification defining the PHY and MAC layer of low power devices.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN
View Answer
Explanation: IEEE 802.15.4.LoWPAN – specification defining the PHY and MAC layer of low power devices supporting 250 Kb/s data rate, small packet size 127 bytes.
7. 6LoWPAN Adaption layer contains?
a) Header compression
b) Fragmentation
c) Layer 2 forwarding
d) Header compression, Fragmentation, and Layer 2 forwarding
View Answer
Explanation: 6LoWPAN Adaption Layer:
Header compression
Fragmentation
Layer 2 forwarding.
8. ________ is an application layer protocol for resource constrained devices.
a) CoAP
b) HMTP
c) MQTT
d) TCP/IP
View Answer
Explanation: CoAP is an application layer protocol (IETF draft) for resource constrained devices. Adheres to the RESTful approach for managing the resources and support mapping to HTTP.
9. Adheres to ________ approach for managing resources and support mapping to HTTP.
a) RETful
b) IoT
c) Restful
d) RESTful
View Answer
Explanation: CoAP is an application layer protocol (IETF draft) for resource constrained devices. Adheres to RESTful approach for managing resources and support mapping to HTTP.
10. ________ resources are identified by Uniform Resource Identifiers.
a) CoAP
b) HMTP
c) MQTT
d) TCP/IP
View Answer
Explanation: CoAP is an application layer protocol (IETF draft) for resource constrained devices. Adheres to Restful approach for managing resources and support mapping to HTTP. CoAP resources are identified by Uniform Resource Identifiers.
11. Which protocol interacts asynchronously over UDP?
a) HMTP
b) CoAP
c) MQTT
d) TCP/IP
View Answer
Explanation: CoAP is an application layer protocol (IETF draft) for resource constrained devices. It is Asynchronous message interactions over UDP, Request/Response semantics CoAP resources are identified by Uniform Resource Identifiers.
12. CoAP messages are short.
a) True
b) False
View Answer
Explanation: CoAP messages are short – 4 bytes header followed by options (Typically, 10-20 bytes header).
13. How many messages types are there in CoAP?
a) 2
b) 5
c) 3
d) 4
View Answer
Explanation: Four message types are:
Confirmable
Non confirmable
Acknowledgments
Reset.
14. Number of methods in CoAP?
a) 2
b) 5
c) 4
d) 3
View Answer
Explanation: Four CoAP methods:
GET
POST
PUT
DELETE.
15. WSN stands for __________
a) Wired Sensor Network
b) Wireless Sensor Network
c) Wired Service Network
d) Wireless Service Network
View Answer
Explanation: WSN – Wireless Sensor Network comprises of motes running a WSN application and a light weight CoAP server.
Sanfoundry Global Education & Learning Series – IOT.
To practice all areas of IOT for Interviews, here is complete set of 1000+ Multiple Choice Questions and Answers.
- Get Free Certificate of Merit in IOT
- Participate in IOT Certification Contest
- Become a Top Ranker in IOT
- Take IOT Tests
- Chapterwise Practice Tests: Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Chapterwise Mock Tests: Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Practice Programming MCQs
- Buy IOT Books
- Buy Computer Science Books
- Apply for Computer Science Internship
- Practice Computer Science MCQs
