Without wasting any time let’s start with the questions & answers
Q1. What are the main parts of IOT systems?
ANSWER
There are three main parts of IOT:-
- Sensors Network
- Connectivity
- Data Storage Applications
Q2. What are the security issues related to IOT?
ANSWER
This is a very common and frequently asked question asked in an IOT interview.
- Data Security
- Data Privacy
are the two very common issues related to IoT.
Why?
because these IoT devices are very vulnerable to the modern-day hacking & cloud endpoints are also used by some hackers to attack the servers of these IoT devices.
Q3. Explain the IOT Protocol Stack?
ANSWER
IOT has around 4 protocol stacks...
- Sensing & information: Smart sensors devices based on Wi-Fi, GPS, RFID falls under this protocol stack.
- Network Connectivity: A layer is based on wired or a non-wired network like WLAN, WMAN, Ethernet, optical, etc.
- Information processing layer
- Application layer
Q4. Explain the basic architecture of the IOT network?
ANSWER
Basically, IOT has three main parts mentioned in the 1st question above.
- Sensors
- Network
- Connectivity Data Storage
The working of the sensors is to communicate directly or via gateway devices with the main/central server for data storage. One gateway can examine multiple wireless interfaces that's why one gateway can handle a number of technologies and various sensors. The standard wireless technologies used widely are.
- Zigbee
- Zwave
- RFID
- NFC etc.
The IOT hardware system can also be made by the use of Micro-Controller Units. Which Micro-Controller is to be used this choice depends on the system & on-chip resources & also on the power required.
To conclude the IOT hardware architecture following are the aspects required:-
- Types of sensors/actuators
- Communication interface type
- Amount of data to be captured & transmitted,
- A frequency of data transportation.
IOT software architecture is dependent on components like Arduino, Linux(Raspberry Pi)
Q5. Explain the Bluetooth Low Energy protocol for an IOT?
ANSWER
With the help of an example...
Nokia firstly introduced this protocol as #wibree in 2006. Additionally, known as Bluetooth smart this particular protocol offers the equivalent range coverage with a better deal of decreased strength consumption because of its unique Bluetooth.
The main advantage of this was that it had comparable bandwidth with narrow spacing utilized by Zigbee. Low electricity latency & minimum complexity made it get included in the low-cost microcontrollers.
Q6. What is the top 5 Machine to Machine (M2M) applications in the world?
ANSWERThey are as follows...
- Asset tracking & monitoring in some mode or the other(stolen automobiles, construction system, fleet) appears to be the greatest.
- Insurance telematics is really huge as it gives insurance organizations the possibility to disable the threat and force higher/extra attractive pricing.
- Utilities/automatic meter reading grids - There are no regulations and funding inside this in the middle time period. As the requirements and business cases can be driven in the numerous ways there exists a number of countrywide solutions.
- Automotive is also a very big demand which is driven by the customer.
- mHealth is also present on a small scale.
Q7. How might the Internet Address (IPv6) affect the development and implementation of the Internet Of Things?
ANSWER
One more very important question which is asked in almost every IOT interview...
A barrier to the improvement or enhancement of IOT is the technical boundaries of the version of
IP which is used everywhere very widely.
IP is actually a set of rule that systems use to ship and receive the data via the Internet, including the specific address which every connected device has to tell.
Version 6 (IPv6) allows a big increment also within the variety of IP addresses.
With IPv4, the maximum no of addresses, 4.2 billion is not enough to provide even 1 deal for every 7.3 billion humans on the planet.
Q8. What is the difference between a wireless sensor network (WSN) and the Internet Of Things(IOT) network?
ANSWER
WSN: The Wi-Fi sensors community is the basis of IOT packages. WSN is a network of motes, fashioned to look at or to control the parameters of wanted utility.
eg. motes disposed of in agriculture land, screen temp-humidity or maybe soil moisture they all are used to gather data.
IOT: IOT is a community of bodily objects managed and controlled over the internet. You shall stumble upon the physical monitoring.
IOT is about M2M and is far better than bringing smartness into the daily gadgets.
e.g. devices pinned in the thermostat controls the surrounding temp. and adjust it to the max. favored placing for.
Q9. What is meant by a smart city regarding the Internet of Things?
ANSWER
As with IOT & different popular era words, there is no fixed consent definition or set of measures for describing with a smart city is. Accurate characterizations vary widely, however in fashionable, these involve the use of IOT and related technologies to IOT for improvement, transportation, governance, and other municipal contributions, for certain desires which include sustainability or excellent lifestyles.
Q10. What is Bluegiga APX4 Protocol for an Internet Of Things?
ANSWER
Bluegiga & wireless together can be used without interruption as they are compliable to the protocols coexisting.
The Bluegiga APX4 protocol supports both Bluetooth & WI-Fi and is based on a 450mhz arm9 processor.