1. What is the primary function of a transducer?
a. To store energy
b. To convert signal from one physical form to another physical form
c. To generate eddy current
d. To generate heat
Answer :- b
2. Which device converts sound to an electrical signal?
a. Speaker
b. Antenna
c. Microphone
d. Strain gauge
Answer :- c
3. Which sensor can detect gases like LPG, CH4, and CO?
a. DHT22
b. MQ-5
c. HC-SR04
d. PIR
Answer :- b
4. What does ‘Resolution’ indicate in a sensor?
a. The correctness of the output
b. The smallest change in input that can be detected
C. The range of sensing
d. The difference between standard and measured values
Answer :- b
5. Which modulation technique is used by Zigbee for the 2.4 GHz band?
a. BPSK
b. QPSK
c. OQPSK
d. FSK
Answer :- c
6. What does 6LoWPAN optimize?
a. Load balancing in Legacy High-power networks
b. Packet transmission in Low-power and lossy networks (LLN)
c. Cryptography in Medium-power networks
d. Error detection in Long-range networks
Answer :- b
7. How long is the Network ID in a Z-Wave network?
a. 1 Byte
b. 2 Bytes
c. 4 Bytes
d. 8 Bytes
Answer :- c
8. Which range is typical for Class 1 Bluetooth radios?
a. 1 meter
b. 10 meters
C. 30 meters
d. 100 meters
Answer :- d
9. What does the Constrained RESTful Environments (CoRE) framework include for service discovery?
a. Registration Interface (RI)
b. Resource Directory (RD)
c. REST based protocols such as HTTP and CoAP
d. All of the above
Answer :- d
10. Which policy controls the duration for which transmitted data is considered to be valid in an loT network?
a. History policy
b. Latency budget policy
c. Lifespan policy
d. Deadline policy
Answer :- c
11. How many levels of QoS does MQTT support?
a. 2
b. 3
c. 4
d. 5
Answer :- b
12. Which protocol is CoAP based on?
a. TCP
b. FTP
C. UDP
d. HTTP
Answer :- c
13. For what kind of applications is AMQP optimized for?
a. Entertainment
b. Financial
c. Vehicular
d. Educational
Answer :- b
14. Which layer in loT architecture is responsible for predictive analytics and data management?
a. Sensing layer
b. Networking layer
C. Service layer
d. Interface layer
Answer :- c
15. State True or False. A sensor’s accuracy does not depend upon it’s resolution.
a. True
b. False
Answer :- a