Which one cannot be suitable communication technology for IoT?
Zigbee
NFC
Bluetooth
Wired network
Answer : D
Explain : Wired networks are less scalable as compared to wireless networks. This can create an obstacle in the process of expansion
Mainly Real Time Systems are used for _______________.
Used for monitoring events as they occur
Used for real time interactive users
Used by user any time offline
Used for real time coding
Answer : A
Explain : Real time system are used for monitoring events as they occur and having a time limit to do it.
In which form data transferred in network layer?
Packets
Datagram
Bytes
Bits
Answer : A
Explain : Data is transferred in the form of Packets via logical network paths in an ordered format controlled by the network layer.
ZigBee is most Suitable communication standard for IoT.
Low data rate
Low power consumption
Both (A) and (B)
East to setup
Answer : C
Explain :Zigbee is a mesh network protocol that was designed for building and home automation applications, and it's one of the most popular mesh protocols in IoT environments.
MQTT stands for :
Message Queue Telegram Transport
Message Queue Telemetry Transport
Message Queuing Telemetry Transport
Message Queuing Telegram Transport
Answer : C
Explain :MQTT stands for Message Queuing Telemetry Transport. It is an extremely simple and lightweight messaging protocol.
Which statement is true in concern with Request-response IoT communication model?
Each Request-response pair is dependent of others
Request – response is a stateless communication model
Client server architecture of Request-response uses queues
In Request-response publisher is a client and broker are server.
Answer : B
Explain :The Request response model is stateless and hence each request is independently handled.
Datagram Transport Layer Security provides :
Security features on UDP
Security features on TCP
Security features on UDP and TCP
None of these
Answer : A
Explain :Datagram Transport Layer Security (DTLS) is a protocol that provides privacy for UDP communications. DTLS is based on the TLS protocol and is used in web browsing, mail, and instant messaging.
How many layers are there in OSI?
4
5
6
7
Answer : D
Explain : There are 7 Layers present in OSI model. They are Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Following layer is not mentioned in TCP/IP Model.
Presentation
Network
Application
Transport
Answer : A
Explain :The four layers of TCP/IP model are the application layer, the transport layer, the network layer, and the link layer.
An IoT protocols does not include:
Network / Internet protocol layer
Link layer protocol
Application layer protocol
Session layer protocol
Answer : D
Explain : IoT protocols are divided into four main layers:
Data link layer: Includes protocols like Bluetooth, ZigBee, and Wi-Fi
Network layer: Transports data from the perception level to the application layer
Transport layer: Includes technologies and protocols that make the connection between the perception level and the application layer possible.
Application layer: Links underlying network connections.
The major characteristics on which OSI and TCP/IP model differs:
OSI model is independent generic protocol & TCP/IP is communication protocol
In OSI model, Transport layer guarantees the delivery
(A) and (B)
TCP/IP model consists of 7 layers
Answer : C
Explain : The OSI model is a generic, protocol-independent standard that acts as a communication gateway between the network and the end user. The TCP/IP model is a communication protocol that allows connection of hosts over a network.
The transport layer is the fourth layer of the Open Systems Interconnection (OSI) model.
It ensures that data packets are delivered accurately and reliably between sender and receiver.
The transport layer uses mechanisms such as: Error control, Flow control, Congestion control. Transport Layer use TCP or UDP.
What does "open-loop control" refer to in a controlled system?
Control system with a closed feedback loop.
Control system without any sensors or feedback.
A control system that is operated outdoors.
A control system with multiple feedback loops.
Answer : B
Explain :An open-loop system is a type of control system in which the output of the system depends on the input but the input or the controller is independent of the output of the system. These systems do not contain any feedback loop and thus are also known as non-feedback system. Open Loop system is not depend on feedback.Example: Traffic signals, bread toaster, sprinkler, ordinary washing machine etx.
A system that utilize a device to control the process without using feedback
Open Loop control system
Closed Loop control system
Regulator
None of these
Answer : A
Explain : Open Loop system is a type of control system that does not depend on feedback.
An air conditioner is a ______ loop system.
Open Loop control system
Closed Loop control system
Regulator
None of these
Answer : B
Explain : Why is AC a closed loop system? Because it recieves feedback through a thermocouple or thermometer, which measure the temperature of the room, in order to adjust to the temperature established on the controller.
In a controlled system, what is the purpose of the sensor or transducer?
To generate control signals.
To process data.
To measure the process variable and provide feedback.
To set the desired setpoint.
Answer : C
Explain : Sensors: Sense the quantity that needs to be observed or measured. Sensors detect the change in physical parameters whereas transducers convert it into some electrical signal suitable for processing.