Introduction To Industry 4.0 And Industrial Internet Of Things Week 7 NPTEL Assignment Answers 2025

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✅ Subject: Introduction To Industry 4.0 And Industrial Internet Of Things (iot 4.0)
📅 Week: 7
🎯 Session: NPTEL 2025 July-October
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NPTEL Introduction To Industry 4.0 And Industrial Internet Of Things Week 7 Assignment Answers 2025

1. Which modulation technique does LoRa use?

a. Amplitude Modulation
b. Frequency Modulation
c. Chirp Spread Spectrum
d. Time Division Multiplexing

Answer : See Answers

2. Fill in the blanks. SIGFOX network give a performance of upto __________ messages per day with a payload of ____________ bytes per message.

a. 140, 12
b. 50, 2
c. 60, 3
d. 100, 10

Answer :

3. What is the key difference between a Zigbee Router and a Zigbee End Device?

a. A router can relay information to other nodes, while an end device cannot.
b. An end device is the root of the network, while a router is not.
c. A router can only connect to a coordinator, while an end device can connect to any node.
d. There is no functional difference between them.

Answer :

4. What software tool is used to configure Xbee modules before communication?

a. Arduino IDE
b. Python
c. XCTU
d. Wireshark

Answer :

5. Which characteristic of IIoT data refers to the fact that it comes from heterogeneous sensors with different metrics, precision, and formats?

a. Real-time
b. Dynamic heterogeneity
c. Polymorphism
d. Correlation

Answer :

6. What is the role of middleware in an IIoT system?

a. It is the physical hardware layer of sensors and actuators.
b. It is the final user-facing application.
c. It is the communication protocol for data transfer.
d. It is a software layer between the infrastructure and application layers that provides services and supports heterogeneity.

Answer : See Answers

7. Which type of analytics answers the question, ”What will happen and why?”

a. Predictive
b. Descriptive
c. Diagnostic
d. Prescriptive

Answer :

8. Which type of analytics aims to determine the best possible business decision?

a. Predictive
b. Descriptive
c. Diagnostic
d. Prescriptive

Answer :

9. What is the primary goal of the FarmBeats platform?

a. To manage smart city infrastructure
b. To enable data-driven precision agriculture
c. To automate cognitive manufacturing
d. To monitor the health of vineyards

Answer :

10. In the iRobot-Factory architecture, which component is responsible for cloud-based, high-performance, long-term data analytics using AI?

a. Intelligent Terminal
b. Cognitive Engine
c. Edge Computing Node
d. Intelligent Device Unit

Answer : See Answers

11. In an Industrial Control System, what are the ”Set Points”?

a. The standard values of process parameters for controlled operation
b. The values of process parameters measured by sensors
c. The process variables that are modified by the controller
d. The final output of the industrial process

Answer :

12. Which of the following best describes a Closed Loop (Feedback) Control system?

a. The control decision is made without considering the process variable
b. It operates independently of the measured output
c. The control decision depends on the measured value of the process variable
d. It is not used in industrial automation

Answer :

13. Fill in the blanks. Programmable Logic Controllers (PLCs) comprises of.__________.

a. Processor unit, memory unit, power supply and communication modules
b. Sensor array, signal generator, analog filter, and PLC terminal
c. Actuator controller, logic gate module, and cooling system
d. Voltage regulator, touchscreen unit, hard disk, and keyboard interface

Answer :

14. Which of the following statements about the DHT sensor in IoT applications is correct?

a. It measures only temperature and requires no external library.
b. It measures both humidity and temperature, and Adafruit provides a dedicated library for its use.
c. It measures pressure and temperature using built-in Python functions.
d. It measures humidity only and is used exclusively for industrial automation and does not need external support.

Answer :

15. Which of the following best describes the role of a SCADA system in industrial processes?

a. It is only a hardware-based system for controlling pumps and valves locally.
b. It enables real-time remote monitoring and control of industrial processes using sensors and actuators, with data visualization through HMI.
c. It is a vendor-specific communication protocol designed only for power plants.
d. It functions as a replacement for PLCs without data logging or visualization features.

Answer : See Answers

NPTEL Introduction To Industry 4.0 And Industrial Internet Of Things Week 7 Assignment Answers 2024

1. Which of the following stands for LP in LPWAN?
a. Large Power
b. Light Power
c. Low Power
d. Long Range

✅ Answer :- c
Explanation: LPWAN stands for Low Power Wide Area Network, used in IoT for long-range, low-power communication.

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2. “We need to pay a license fee to use LoRa in the 868 MHz radio frequency band in Europe.” State True or False.
a. True
b. False

✅ Answer :- b
Explanation: LoRa operates in the unlicensed ISM bands, so no license fee is required in Europe.

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3. Which of the following is true about the SIGFOX network in terms of messages and payload?
a. Up to 50 messages/day with 8 bytes
b. Up to 75 messages/day with 10 bytes
c. Up to 140 messages/day with 12 bytes
d. Up to 200 messages/day with 15 bytes

✅ Answer :- c
Explanation: SIGFOX allows 140 messages per day, each with up to 12 bytes payload.

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4. Which library (header file) is used for interfacing the DHT22 sensor?
a. DHT.h
b. DHT22.h
c. DHT11.h
d. Adafruit_DHT.h

✅ Answer :- a
Explanation: The DHT.h library is commonly used to interface DHT11/DHT22 sensors in Arduino-based projects.

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5. Which of the following topologies are supported by Zigbee?
a. Point-to-Point and Star
b. Bus and Ring
c. Tree, and Mesh
d. Ring and Mesh

✅ Answer :- c
Explanation: Zigbee supports Star, Tree, and Mesh topologies for flexible and scalable networking.

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6. The physical and MAC layers of Zigbee communication protocol is based on ____________
a. IEEE 802.11
b. IEEE 802.15.4
c. IEEE 802.3
d. IEEE 802.16

✅ Answer :- b
Explanation: Zigbee is built on IEEE 802.15.4, designed for low-rate wireless personal area networks.

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7. “Xbee is a mesh communication protocol based on IEEE 802.15.4 whereas Zigbee is the product that uses the Xbee protocol.” True or False?
a. True
b. False

✅ Answer :- b
Explanation: Xbee is a hardware module that can use Zigbee protocol, not the other way around.

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8. Function of the coordinator node in a Zigbee network?
a. Data relay
b. End device connector
c. Acts as the root of the network and bridge between different networks
d. Control plane

✅ Answer :- c
Explanation: Coordinator node initializes the network and manages routing and addressing.

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9. Which of the following is/are the data characteristics of IIoT processing?
a. Polymorphism
b. Temporal relationships in data
c. Correlation in space, time, and other dimensions
d. All of the above

✅ Answer :- d
Explanation: IIoT data is complex and dynamic, involving all the above characteristics.

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10. Which of the following is false about the rule-based engine?
a. Extract causal and temporal patterns
b. Correlates multiple data streams
c. Cannot process data in near real-time
d. Decision-making based on predefined rules

✅ Answer :- c
Explanation: Rule-based engines can process near real-time data, so the statement is false.

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11. Limitation of current CEP systems?
a. Manual threshold specification
b. No run-time threshold updates
c. Not context-aware
d. All of the above

✅ Answer :- d
Explanation: These are major limitations in Complex Event Processing (CEP) systems.

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12. Which of the following is false about Smart Water Management System services?
a. Entirely non-replicable services
b. Fully customizable services
c. Application-specific services
d. Entirely replicable services

✅ Answer :- a
Explanation: Services in such systems are replicable and customizable; option a is false.

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13. “iRobot-Factory is a cognitive manufacturing factory using cognitive intelligence and edge computing.” True or False?
a. True
b. False

✅ Answer :- a
Explanation: iRobot-Factory uses AI and edge computing for smart manufacturing.

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14. Which of the following is false about the design of SmartSantander?
a. Heterogeneity
b. Reliability
c. Mobility
d. Unrealistic experimentation

✅ Answer :- d
Explanation: SmartSantander was designed for real-world realistic experiments, so the statement is false.

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15. Which of the following represents a type of Industrial Control System?
a. Programmable Logic Compiler
b. Decentralized Control Suite
c. Supervisory Control and Data Acquisition
d. Distributed Compiled System

✅ Answer :-c
Explanation: SCADA is a major Industrial Control System (ICS) used for monitoring and control.