Category: IOT Objective Questions

IOT Multiple Choice Questions on “IoT Architecture for Smartgrid”.

1. What is the role of Bigdata in smart grid architecture of IoT?
a) Store data
b) Manage data
c) Collect data
d) Security

Answer: a
Clarification: Bigdata stores time series data, unstructured data, provided context for analytics, API for enterprise applications.

2. What is the role of Cloud in smart grid architecture of IoT?
a) Store data
b) Manage data
c) Collect data
d) Security

Answer: b
Clarification: Cloud to edge Middleware: manage data and edge devices, data streaming and event processing, control authorized access.

3. What is the role of Gateway in smart grid architecture of IoT?
a) Store data
b) Manage data
c) Collect data
d) Security

Answer: c
Clarification: Gateway: collects data from sensors, abstract protocols, perform local autonomous decision, transfer information.

4. What is the role of Sensor in smart grid architecture of IoT?
a) Store data
b) Manage data
c) Collect data
d) Security

Answer: a
Clarification: Sensors and Actuators are connected, send data when needed, secure and low power, easy to install and configure.

5. IoT gateway must provide __________
a) Simple and fast installation
b) Security with hardware
c) Data storage
d) Protocol abstraction

Answer: d
Clarification: IoT gateway must provide:
Protocol abstraction
Computing and I/O performance
Integration communication capability.

6. Which of the following is IoT device manageability?
a) Protocol abstraction
b) Simple and fast installation
c) Security with hardware
d) Data storage

Answer: b
Clarification: IoT Device Manageability:
Simple and fast Installation and configuration
Enable deployment of new application
Remote administration of gateways.

7. IoT security management includes ________
a) Protocol abstraction
b) Simple and fast installation
c) Security with hardware
d) Data storage

Answer: c
Clarification: IoT security management :
Improves security with hardware
Enable secure communication to sensors
End to End Security from Sensor to Cloud.

8. IoT data scalability includes ________
a) Protocol abstraction
b) Simple and fast installation
c) Security with hardware
d) Data storage

Answer: d
Clarification: IoT Data Scalability:
Data and Event processing at the edge
Data storage at the edge
Hierarchical clouds.

9. What is the example for smart grid edge device for utility?
a) Smart Meters
b) Smart Home
c) Smart Car
d) Smart Collage

Answer: a
Clarification: Examples of Smart Grid Edge Devices for Utilities:
Voltage and Current sensors
Smart Inverters
Smart Motors.

10. According to the analysis on IoT application frame work, smart grid is divided into ________ layers.
a) 2layers
b) 3 layers
c) 4 layers
d)5 layers

Answer: b
Clarification: According to analysis on IoT application framework based on a smart grid, node features of various parts, distinct application needs and basic IoT model, IoT based on smart grid is a combination of :
Perception layer
Smart network layer
Smart Application layer.

11. Monitor target of the smart ________ includes sensor objects in the power link.
a) Perception layer
b) Smart network layer
c) Smart Application layer
d) Data layer

Answer: a
Clarification: Monitor target of the smart perception layer includes sensor objects in the power link, smart house hold objects and smart security objects.

12. ________ layer can be divided into the data access network and the core network.
a) Perception layer
b) Smart network layer
c) Smart Application layer
d) Data layer

Answer: b
Clarification: Smart network layer can be divided into the data access network and the core network. The data on perception terminals and interaction terminals is uploaded to the power access network and the Internet separately according to its type and security level.

13. In ________ layer, various application platforms are built as required by the services needs of smart grid.
a) Perception layer
b) Smart network layer
c) Smart Application layer
d) Data layer

Answer: c
Clarification: In the smart application layer, various application platforms are built as required by the services needs of smart grid. The application platform as required by the services needs of smart grid.

14. ICT stands for ________
a) Information and Communication Technology
b) Internet and Communication Technology
c) Internet and Communication of Things
d) Information and Communication of Things

Answer: a
Clarification: A hierarchical architecture of IoT that applies to all aspects of smart grid, based on research on smart grid ICT (Information and Communication Technologies) as well as its functional demand analysis.

15. Do we have defects with the existing power communication network?
a) True
b) False

Answer: a
Clarification: There exists many defects with the existing power communication network. For example, blind zones are present. Currently, high voltage transmission lines completely rely on manual inspection.

IOT Multiple Choice Questions on “Accelerometer and Gyroscope Sensor”.

1. Which axis accelerometer is mostly used in IOT?
a) 2- axis
b) 3- axis
c) 1- axis
d) Combination of all

Answer: b
Clarification: It uses 3-axis accelerometer. It detect orientation, shake, tap, double tap, fall, tilt, motion, positioning, shock or vibration.

2. Accelerometer is the measurement of ________
a) Velocity/time
b) Energy/time
c) Height/time
d) Angle/time

Answer: a
Clarification: Accelerometer is the measurement of the change in velocity or speed divided by time. For example, a car accelerating from a standstill to 60mph in 60 seconds is determined to have an acceleration of 10mph per second(60/6).

3. What is the use of accelerometer in laptops?
a) To rotate the screen
b) To protect hard drives from damage
c) To get the angle on monitor
d) To get the linear acceleration

Answer: b
Clarification: Accelerometer in laptops protect hard drives from damage. If the laptop were to suddenly drop while in use, the accelerometer would detect the sudden free fall and immediately turn off the hard drive to avoid hitting the reading heads into the hard drive platter.

4. Are accelerometer used in cars?
a) True
b) False

Answer: a
Clarification: Accelerometers are likewise used in cars as the industry method way of detecting car crashes and deploying airbags almost instantaneously.

5. How many and what are the parts that are present in the accelerometer sensor?
a) 1, capacitor sensor
b) 3, piezoelectric effect, Analog display, digital display
c) 2, piezoelectric effect and capacitor sensor
d) 2, Capacitor sensor, digital Display

Answer: c
Clarification: The accelerometer consists of many different parts and work in many ways, two of which are piezoelectric effect and the capacitor sensor. The piezoelectric effect is the most common form of accelerometer and uses microscopic crystal structures that become stressed due to accelerative forces.
The capacitance accelerometer senses changes in capacitance between micro structures located next to the device.

6. The BGM160 gyroscope sensor is fitted with ________ interfaces.
a) Only SPI
b) Only I2C
c) SPI and UART
d) SPI and I2C

Answer: d
Clarification: The BGM160 is fitted with digital bi-directional SPI and I2C interfaces for optimum system integration, which require 3.3v operation.

7. Gyroscope is used for_________
a) Anti-theft
b) Capacitive proximity sensing
c) Gaming
d) Angle detection

Answer: c
Clarification: Gyroscope is mainly used in 3D mouse, games and athlete training. Gyroscope is also used in navigation, Remote control, notebooks and ultrabooks.

8. Gyroscope is used to measure_________
a) Linear Acceleration
b) Angular velocity
c) Angular velocity and linear acceleration
d) Linear velocity

Answer: b
Clarification: Gyroscope is used to measure angular velocity. Gyroscopes aimed to create smaller and more sensitive devices.

9. What is the rate noise density of gyroscope?
a) 0.011 dps/√Hz
b) 0.0011 dps/√Hz
c) 1.11 dps/√Hz
d) 11.1 dps/√Hz

Answer: a
Clarification: Gyroscopes offer superior stability over time and temperature, with a rate noise density up to 0.011 dps/√Hz. This guarantees the level of accuracy required by the most of the advanced motion-based applications.

10. How many sensing structures are there in gyroscope sensor?
a) Two structures
b) Three structures
c) Depending on application
d) Single structure

Answer: d
Clarification: The 3-axis gyroscopes have a single sensing structure for motion measurement along all three orthogonal axis, while other solutions on the market relay on two or three independent structures.

11. Theory behind working of accelerometer can be understood from ________
a) Rotary
b) Liner
c) Newtonian mechanism
d) Reciprocating

Answer: c
Clarification: Theory behind working of accelerometer can be understood from mechanical model of accelerometer, using Newtonian mechanics. The sensing element essentially is a proof mass.

12. ________ is included in a system to provide desirable damping effect.
a) Speedometer
b) Seismic
c) Damper
d) Dashpot

Answer: d
Clarification: A dashpot is also included in a system to provide desirable damping effect. The dashpot is attached between the mass and the casing.

13. Displacement and acceleration are related by fundamental scaling law.
a) True
b) False

Answer: a
Clarification: Displacement and acceleration are related by fundamental scaling law. A higher resonant frequency implies less displacement or low sensitivity.

14. ________ sensor is used for tracking rotation or twist.
a) Gyroscope
b) Temperature
c) Pressure
d) Proximity

Answer: a
Clarification: Accelerometers in mobile phones are used to detect the orientation of the phone. The gyroscope adds an additional dimension to the information supplied by the accelerometer by tracking rotation or twist.

15. Ring laser type gyroscope operates based on _________ principle.
a) Damper
b) Sagnac
c) Seismic
d) Dashpot

Answer: b
Clarification: Ring laser type gyroscope operates based on sagnac effect. Sagnac involves splitting a beam of light in two and sending them through different opposite paths and then creating interference between the two beams.

IOT Multiple Choice Questions on “Application Layer”.

1. AMQP stands for ____________
a) Advanced Message Queuing Protocol
b) Application Message Queuing Protocol
c) Advanced Mailing Queuing Protocol
d) Application Mailing Queuing Protocol

Answer: a
Clarification: Advanced Message Queuing Protocol (AMQP) is an open standard application layer protocol for message oriented middleware. The defining features of AMQP are message oriented, queuing, routing, reliability and security.

2. The best example for interoperability at the application layer is?
a) Data
b) Net
c) File
d) Web

Answer: d
Clarification: The best example of interoperability at the application layer is web. The web made the internet successful by creating an open, simple and highly interoperabe layer where data can be exchanged between servers and consumed by applications.

3. Services provided by application layer?
a) Web chat
b) Error control
c) Connection services
d) Congestion control

Answer: a
Clarification: There are many services provided by application layer:
1. Simple mail transfer protocol
2. File transfer
3. Web transfer
4. Web chat etc.

4. How many protocols are used in the application layer?
a) 15
b) 10
c) More than 15
d) More than 10

Answer: c
Clarification: More than 15 protocols are used in the application layer, including file transfer protocol, Telnet, Trivial File Transfer Protocol and simple network Management Protocol.

5. What is the main responsibility of application layer?
a) Error handling
b) Web surfing
c) Virtual terminal
d) Network data sharing

Answer: a
Clarification: This layer has many responsibilities, including error handling and recovery, data flow over a network and full network flow. It is also used to develop network based applications.

6. Reoccurring problems can be achieved using __________
a) DNS
b) Telnet
c) BOOTP
d) Patterns

Answer: d
Clarification: There are commonly reoccurring problems that occur in the design and implementation of communication protocol and can be addressed by patterns from several different pattern languages: Pattern Language for Application Level Communication Protocol etc.

7. Application layer is the ending of the data layer.
a) True
b) False

Answer: a
Clarification: The application layer is the ending of data transfer. When you get here, you will find applications like Microsoft word or programs like java.

8. Application layer interacts directly with the ________
a) front user
b) end user
c) sensors
d) wired link

Answer: b
Clarification: In perception layer sensor networks are deployed on various locations. Network layer contains Wireless or wired link. while application layer interacts directly with the end user.

IOT Multiple Choice Questions on “Building a Web- based Dashboard”.

1. _________ is used to visualize data collected with the sensor.
a) freeboard.io
b) Dweet.io
c) Dweeting
d) Yocto

Answer: a
Clarification: freeboard.io visualize the data collected with the sensor and published to dweet.io in many gauges and make the dashboard available to different computers and devices all over the world.

2. Freeboard.io allows us to build ________
a) Application
b) Dashboard
c) Device
d) Output

Answer: b
Clarification: Freeboard.io allows us to build a dashboard by selecting data source and dragging and dropping customizable widgets.

3. freeboard.io itself defines as ________
a) Data based service
b) Fog based service
c) Cloud based service
d) Signals based service

Answer: c
Clarification: Freeboard.io defines itself as a cloud based service that allows us to visualize the internet of things.

4. Gauge will display the latest value that is running in the board.
a) True
b) False

Answer: a
Clarification: The gauge will display the latest value that the code running in the board dweeted for the ambient temperature in degree Fahrenheit.

5. Which application feature is a world of warcraft gadget?
a) Leftronic
b) Ducksboard
c) Klipfolio
d) Dashzen

Answer: d
Clarification: Dashzen contains many gadgets. One unique feature of Dashzen is that world of Warcraft Gadget.

6. Which application supports Google Spreadsheets?
a) Dashzen
b) Ducksboard
c) Klipfolio
d) Leftronic

Answer: b
Clarification: Ducksboard can tap many sites APIs to display data, but it also offers its own API, which lets you send your own data into your dashboard. Ducksboard supports Google spreadsheets as a data source.

7. Which application allows a number of unique background images?
a) Dashzen
b) Ducksboard
c) Klipfolio
d) Leftronic

Answer: b
Clarification: Ducksboard offers a number of unique background images including the default, which looks like wood flooring.

8. Which application allows us to build data source against many types of data?
a) Dashzen
b) Ducksboard
c) Klipfolio
d) Leftronic

Answer: c
Clarification: Unlike other products, Klipfolio doesn’t just link up to existing APIs. It also allows us to build data source against many types of data, including Excel, CSV.

9. ________ uses a clean interface to provide data.
a) Dashzen
b) Ducksboard
c) Klipfolio
d) Dash

Answer: d
Clarification: Dash uses a clean interface to provide data from various social and new sites, as well as websites monitoring tools and fitness tracking sites.

10. Dash supports static images.
a) True
b) False

Answer: a
Clarification: The dash supports static images and text as well as a clock widget and weather widget.

IOT Multiple Choice Questions on “Taking Control of Gesture Interactions”.

1. __________ Uses voice to control the devices.
a) Google Home
b) Apple HomePod
c) Both Google Home and Apple HomePod
d) Google Sheets

Answer: c
Clarification: Google Home, or Apple HomePod, takes in the user’s voice to control the devices. Like, with the help of voice all the parts of our home can be done.

2. Do we have problems using screen in smartphones.
a) True
b) False

Answer: a
Clarification: This can be the user’s smartphone screen, but some devices, like smartwatches, have screens of their own. The problem in the latter case is that these screens can be tiny and hard to use effectively. Neither voice control nor smartphone control offer adequate solutions to this problem.

3. What should be the frequency of the soil for hand gesturing functions?
a) 50 GHz
b) 60 GHz
c) 35 GHz
d) 40 GHz

Answer: b
Clarification: Soil uses high frequency 60GHz radar to sense fine hand gestures that can be mapped to certain functions.

4. What is the gesture that can be produced by tapping index finger to the tip of your thumb?
a) Pressing a virtual button
b) Twisting a virtual dial
c) Pressing a virtual button and Twisting a virtual dial
d) Neither Twisting a virtual dial nor Pressing a virtual button

Answer: a
Clarification: Example of soil intuitive virtual tools, by tapping your index finger to the tip of your thumb, you can simulate pressing a virtual button.

5. What is the gesture that can be produced by rubbing your index finger against your thumb?
a) Pressing a virtual button
b) Twisting a virtual dial
c) Pressing a virtual button and Twisting a virtual dial
d) Neither Twisting a virtual dial nor Pressing a virtual button

Answer: b
Clarification: Example of soil intuitive virtual tools, you can rub your index finger against your thumb to simulate twisting a virtual dial.

6. Using gestures to interact with augmented applications _________
a) Providing movement
b) Modifying a virtual menu
c) Changing the direction
d) Navigating a virtual menu

Answer: d
Clarification: Using it to control smartwatches, one could readily imagine using gestures to interact with augmented or virtual reality applications, such as navigating a virtual menu.

7. Soli has ______
a) Small form factor
b) High power
c) High form factor
d) Medium power

Answer: a
Clarification: Soil has small form factor, and low power, soil is practically custom made for IoT devices. With the help of soli gesture functions can be performed.

8. Does smart phone use soli.
a) True
b) False

Answer: a
Clarification: Smart home devices may also be a natural fit for soli- perhaps you could turn a light on or off by flicking your fingers at it.

9. RFID stands for ________
a) Radio Frequency Industry
b) Random Frequency Identification
c) Radio Flow Industry
d) Radio Frequency Identification

Answer: d
Clarification: In the early years of IoT, RFID (Radio Frequency Identification) and sensor technologies were the focus. The concept has grown enormously during the last decade.

10. IoT describes where Internet provides _________
a) Network
b) Things
c) Architecture
d) Objects

Answer: b
Clarification: IoT describes a system where Internet enabled “things” in the physical world equipped with sensors, actuators and capable of interacting with the environment are connected to the internet for monitoring and control of the physical “things”.

11. Is our technology out of sync.
a) True
b) False

Answer: a
Clarification: Today’s technology can sometimes feel like it’s out of sync with our senses as we peer at small screens, flick and pinch fingers across smooth surfaces, and read tweets “written” by programmer created bots.

12. Do we have H2M communication.
a) True
b) False

Answer: a
Clarification: As people and companies prepare to adapt to the internet of things, with its ever winding focus on machine to machine communication, it’s a good time to ask where people will fit in. H2M-Human to Machine communication conversation can be done with gestures.

13. Is gesture technology important.
a) False
b) True

Answer: b
Clarification: Gesture technology is important because when it is implemented correctly, it becomes something we barely think about. It can make basic interactions with everyday objects simple and intuitive.

14. _________ Is experimenting to turn human body in to sort of antenna.
a) Sony
b) Samsung
c) Ericcson
d) Lenovo

Answer: c
Clarification: Ericcson is experimenting with a product it calls the connected paper to turn the human body into a sort of antenna.

15. Which company is trying to develop hand gestures into virtual controls?
a) Mahindra
b) Microsoft
c) Qualcomm
d) Google

Answer: d
Clarification: Google’s project soli, which turns hand gestures into virtual controls – without the need for a virtual reality headset. Instead of a tiny sensor that fits onto a chip tracks at high speed and accuracy not just big arm waving gestures but also sub mm hand movement, using .radar

IOT Questions 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

Answer: a
Clarification: 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

Answer: a
Clarification: 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

Answer: b
Clarification: 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

Answer: c
Clarification: 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

Answer: d
Clarification: 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

Answer: d
Clarification: 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

Answer: d
Clarification: 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

Answer: a
Clarification: 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

Answer: d
Clarification: 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

Answer: a
Clarification: 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

Answer: b
Clarification: 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

Answer: a
Clarification: 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

Answer: d
Clarification: Four message types are:
Confirmable
Non confirmable
Acknowledgments
Reset.

14. Number of methods in CoAP?
a) 2
b) 5
c) 4
d) 3

Answer: c
Clarification: 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

Answer: b
Clarification: WSN – Wireless Sensor Network comprises of motes running a WSN application and a light weight CoAP server.