10+ IOT Engineer Interview Questions and Answers

I will see the status of the devices and their connection status to the MQTT broker.

• Check the connection status of each device to the MQTT broker

• Monitor the data flow between the devices and the MQTT broker

• Identify any errors or issues in the connection process

• Ensure that all devices are successfully connected to the MQTT broker

If the server fails to load the data, the user will see an error message or a blank screen.

• The user may see an error message indicating the failure to load data.

• The user may see a blank screen with no data displayed.

• The user may experience slow loading times or timeouts.

• The user may see placeholder content until the data is loaded.

The master with the lower address will take preference in sending data on I2C.

• The master with the lower address on the I2C bus will take preference in sending data.

• I2C arbitration is based on the address of the master, with lower addresses having higher priority.

• If two masters attempt to send data simultaneously, the one with the lower address will win the arbitration and proceed to send its data.

Stack is Last In First Out (LIFO) data structure, while Queue is First In First Out (FIFO). Recursion is a function calling itself. System design involves planning and organizing components of a system.

• Stack: LIFO, examples - browser history, undo feature in text editors

• Queue: FIFO, examples - printer queue, waiting line at a ticket counter

• Recursion: function calling itself, example - factorial calculation using recursion

• System design: planning and organizing components, exam...read more

Mass provision devices using AWS IoT involves creating a fleet provisioning template and using AWS IoT Device Management service.

• Create a fleet provisioning template in AWS IoT console

• Use the template to provision multiple devices at once

• Utilize AWS IoT Device Management service for managing and monitoring provisioned devices

Threads on automobile parts are standardized to ensure compatibility and ease of maintenance.

• Standardization of threads ensures that parts from different manufacturers can be easily interchanged.

• Thread standards include pitch, diameter, and thread form.

• Examples of standardized threads include metric, unified, and pipe threads.

• Automobile parts with standardized threads include spark plugs, oil filters, and wheel studs.

Azure IoT provides various methods for provisioning devices including manual, automatic, and zero-touch provisioning.

• Use Azure IoT Hub Device Provisioning Service for automatic provisioning

• Leverage Azure IoT Hub Device Twins for manual provisioning

• Implement zero-touch provisioning using Azure IoT Edge

I2C is a serial communication protocol used to connect multiple devices in a master-slave configuration.

• I2C uses two wires - SDA (data line) and SCL (clock line) for communication

• Devices are connected in a bus topology with a master device controlling the communication

• Each device on the bus has a unique address for identification

• Communication is initiated by the master device which sends start and stop signals

• Data is transferred in 8-bit chunks with acknowledgment from the re...read more

Padding in ES refers to adding extra bits to the data being transmitted to ensure it meets a certain block size.

• Padding is commonly used in encryption algorithms to ensure that the data being encrypted is a multiple of the block size.

• There are different types of padding such as zero padding, PKCS#5 padding, and ANSI X.923 padding.

• Padding can also be used in communication protocols to ensure that data packets are of a consistent size.

The controllers used for the project are Arduino Uno and Raspberry Pi.

• Arduino Uno is a microcontroller board based on the ATmega328P.

• Raspberry Pi is a single-board computer that runs on Linux and is capable of handling complex tasks.

• Both controllers are commonly used in IoT projects for their versatility and ease of use.