Top 10 IoT Interview Questions and Answers for 2023


Top IoT Interview Questions and answers frequently asked in interviews have been covered in this post. This served as a reference for the list of top IoT interview questions and answers so applicants could quickly understand them.

Top 10 IoT Interview Questions and Answers

Following are the top 10 IoT (Internet of Things) interview questions and answers you should know:

1. What is the Internet of Things (IoT)?

The Internet of Things includes sensors, electronics, networks, and software that enable data collection. Only through IoT can mobile phones, laptops, and other gadgets connect to the internet.

2. What are Different Layers of IoT Protocol Stack?

The levels of IoT protocol are as follows:

1. Network connection

2. Sensing and information

3. Application

4. Data processing

3. What is Arduino?

In a nutshell, Arduino is a free electronics development platform, and both the hardware and software are simple to use. It has a microcontroller that can receive information from sensors and control motors.

4. Mostly used sensors in IoT?

Here we have listed some of the most used sensors in IoT.

Temperature sensor

Gas sensor

IR sensor

Smoke sensor

Proximity sensor

Pressure sensor

5. What is Raspberry Pi?

Raspberry Pi can do all kinds of computer-like tasks around us. Also, it has Bluetooth and onboard WiFi to communicate with many things.

6. What are the components of IoT?

There are mainly four types of components in IoT.

Device  The gadget is the primary tool for gathering all the info surrounding you. You can find every detail in the data. It may be a temperature sensor or another type.

Data pressing – Once the data is collected, it goes to the cloud, usually on devices like heaters. However, it is sometimes very complex, such as object recognition or video vision tasks.

Connection – All received data is sent to Katamo in the cloud. All sensors should be connected to this cloud and can be connected through mobile, Wi-Fi or Bluetooth, etc.

User Interface – Perception is always important to the end user. Which can be sent to their phone through email or message ads. Users sometimes need such an interface.

7. Benefits from IoT?

Here are some of the benefits of IoT 

Advanced data collection – IoT has the advantage of immediate action on data. Furthermore, data intake is limited and designed for passive use.

Technology Optimization – Helping improve technologies and thereby improve them. For example, data from many vehicle sensors can be collected very easily manufacturers can further enhance its design or efficiency.

Reduced waste – It leads to effective decision-making and resource management, which enables real-time. For example, if one or more vehicle engines may have a problem, then it is possible to plan the production of those engines, and it becomes easier to solve the problem.

Improved customer engagement - improving the customer experience by finding and solving problems and improving things.

8. Common IoT applications?

Below are listed common IoT applications:

Smart Thermostat – Saves heating bills by knowing your usage patterns.

Connected car – Automobile companies can get help in billing, packing, insurance, and other related things through it.

Activity Tracker – Helps measure your body's heart rate, activity level, calories burned, and skin temperature of a healthy person.

Parking sensor – accurate real-time detection of a parking space by just one iot user.

Smart Outlet allows you to turn the device on or off remotely without going near it. With it, you can track the device's power or send ads directly to your smartphone.

Connect Health – Real-time patient care is provided through the idea of a healthcare system. Currently, a patient cannot heal without cutting-edge care, assisting the patient in selecting the best course of action.

9. What are the disadvantages of IoT?

Here will know about the disadvantages of IoT:

Privacy – Privacy is a big issue in IoT. IoT exposes any personal information without the user's presence, which is very problematic.

Security – There is an ecosystem in IoT devices. But even though it has a lot of cyber security, it still provides authentication.

Complexity – To be honest, IoT is very difficult to deploy and maintain because IoT is very complex by design.

Flexibility – It usually integrates with other systems to make things more versatile. So there is an initiative with iot flexibility

Compliance – This can be a very challenging issue. But anyway, it has its neon control.

10. Types of testing in IoT

Below are listed types of testing in IoT:

Usability – Users have many devices of different sizes. Its users have changed from others, and that's why system usability testing is very useful in IoT.

Compatibility Testing – IoT systems enable connecting devices containing hardware and software. As a result, compatibility testing is crucial for IoT systems.

Security Testing – it is accessing large amounts of critical data. So the most important thing is to verify the user through authentication; data privacy is possible as part of the security test.

Data Integrity Testing – Data integrity testing is very useful in IoT testing because it requires a lot of data.

Reliability and Scalability Testing – Reliability and scalability are essential to building an IoT test environment. It is an important virtualization tool.

Performance Testing – Performance testing is important because the strategic approach to the IoT testing plan is to be realized.


We have explained to you here our best, which will help you a lot. From this article, you will get IoT advantages, disadvantages, applications, protocols, testing in IoT, applications, benefits, components of IoT, and much more.

Updated on: 04-Jan-2023


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