Looking for accurate and reliable NPTEL Week 1 answers for the course “Introduction To Industry 4.0 And Industrial Internet Of Things”? You’re in the right place. Below are the verified answers with clear explanations.
1. Fill in the blank space designated by the question mark.
Options:
a) Snubber
b) Repeater
c) Processor
d) Amplifier
Answer:✅ c) Processor
Explanation:
A processor is the control unit that interprets and executes instructions. It is a central component in industrial automation systems.
2. What is the maximum data rate of Z-Wave communication technology?
Options:
a) 100 kbps
b) 250 kbps
c) 500 kbps
d) 1 Mbps
Answer:✅ a) 100 kbps
Explanation:
Z-Wave is designed for low-bandwidth, low-power communication in smart homes, with a max speed of 100 kbps.
3. Which device converts electromagnetic energy into electricity and vice versa?
Options:
a) Speaker
b) Antenna
c) Microphone
d) Strain gauge
Answer:✅ b) Antenna
Explanation:
Antennas can both transmit and receive electromagnetic signals, converting between electrical and electromagnetic energy.
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4. What does ‘Range’ indicate in a sensor?
Options:
a) The correctness of the output
b) The smallest change in input that can be detected
c) The difference between the standard value and the value produced by the sensor
d) The highest and the lowest value of the physical quantity within which the sensor can actually sense
Answer:✅ d
Explanation:
Range refers to the limits within which a sensor can detect and respond to input changes accurately.
5. Which coding scheme is used by the IEEE 802.15.4 standard for transmitting information?
Options:
a) CSS
b) THSS
c) OFDM
d) DSSS
Answer:✅ d
Explanation:
DSSS (Direct Sequence Spread Spectrum) is the modulation method used in IEEE 802.15.4 to enhance signal robustness.
6. What is the standard transmission range of IEEE 802.15.4?
Options:
a) 10 m to 75 m
b) 1 m to 9 m
c) 15 cm to 60 cm
d) 1 cm to 10 km
Answer:✅a
Explanation:
IEEE 802.15.4 supports short-range wireless communication up to about 75 meters, depending on environment and hardware.
7. Which low power radio communication technology was designed as a simpler and cheaper alternative to Zigbee?
Options:
a) Bluetooth
b) Z-Wave
c) RFID
d) NFC
Answer:✅ b
Explanation:
Z-Wave is widely used in consumer home automation for its simplicity and cost-effectiveness compared to Zigbee.
8. Which organization has developed the ISA 100.11a standard?
Options:
a) Instrument Society of America
b) International Society of Automation
c) International Studies Association
d) International Solar Alliance
Answer:✅ b
Explanation:
The International Society of Automation developed the ISA 100.11a standard to ensure reliable wireless communication in industrial environments.
9. What communication modes are supported between two NFC devices?
Options:
a) Broadcast-Multicast
b) Master-Slave
c) Active-Active or Active-Passive
d) All of these
Answer:✅ c
Explanation:
NFC can operate in both Active-Active and Active-Passive modes, enabling device-to-device communication.
10. Which of the following is/are the drawbacks of proprietary non-IP-based solutions?
Options:
a) Limited flexibility to end users
b) Interoperability
c) Limited last-mile connectivity
d) All of these
Answer:✅ d
Explanation:
Proprietary non-IP systems often lack flexibility, interoperability, and have limited coverage in the last mile.
11. Which MQTT QoS Level is also known as “at most once” delivery?
Options:
a) QoS 0
b) QoS 1
c) QoS 2
d) None of these
Answer:✅a
Explanation:
QoS 0 means the message is delivered at most once, without any confirmation or retries.
12. In CoRE, the IoT client uses ____________ for the discovery of IoT devices.
Options:
a) Lookup interface
b) Resource Directory
c) Registration Interface
d) None of these
Answer:✅a
Explanation:
The Lookup Interface is used by the client to discover resources available on a CoRE network.
13. Apart from MQTT, which IoT networking protocol supports the publish/subscribe framework?
Options:
a) XMPP
b) AMQP
c) DDS RTPS
d) All of these
Answer:✅ d
Explanation:
XMPP, AMQP, and DDS RTPS are all capable of implementing publish/subscribe communication models.
14. Which of the following IoT protocols is based on the session layer of the OSI model?
Options:
a) MQTT
b) CoAP
c) AMQP
d) DTLS
Answer:✅ d
Explanation:
DTLS provides security at the session layer for datagram-based applications, often used in IoT systems.
15. Which of the following is not a component of RFID?
Options:
a) RFID Tag
b) RFID reader
c) Antenna
d) Router
Answer:✅ d
Explanation:
A router is a network device and not part of the core RFID system, which includes tags, readers, and antennas.
✅Conclusion
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