Mobiveil Technologies India Interview Questions, Process, and Tips

Q1. How to mass provision devices using AWS IoT
Ans. 
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
Answered by AI
Add your answer
Q2. How to provision devices using Azure IoT
Ans. 
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
Answered by AI
Add your answer
Q3. What all protocols have you worked on in IoT
Ans. 
I have worked on protocols such as MQTT, CoAP, HTTP, and LoRaWAN in IoT projects.
• MQTT (Message Queuing Telemetry Transport)

• CoAP (Constrained Application Protocol)

• HTTP (Hypertext Transfer Protocol)

• LoRaWAN (Long Range Wide Area Network)
Answered by AI
Add your answer
Q4. How I2C protocol works
Ans. 
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 t...read more
Answered by AI
Add your answer
Q5. If 2 masters on I2C send data at once which one will take preference ?
Ans. 
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.
Answered by AI
Add your answer

Q1. What is the difference between structure and union
Ans. 
Structure is a data type that allows storing different data types in a single variable, while union is a data type that allows storing only one value at a time.
• Structure allows storing multiple data types in a single variable, while union allows storing only one value at a time

• In structure, each member has its own memory location, while in union all members share the same memory location

• Example: struct Person { char na...read more
Answered by AI
Add your answer
Q2. What is the volatile keyword and it's purpose
Ans. 
The volatile keyword is used in C/C++ to indicate that a variable may be changed unexpectedly by external factors.
• Used to prevent compiler optimizations that assume the variable's value will not change.

• Commonly used for variables shared between threads or accessed by interrupt service routines.

• Example: volatile int sensorValue; // variable updated by hardware interrupts
Answered by AI
Add your answer

Linked list , data structures

Q1. Explain about yourself
Add your answer
Q2. Asked past experience
Add your answer

Q1. Bitwise operation and memory layout in c
Ans. 
Bitwise operations are used to manipulate individual bits in memory. Memory layout in C refers to how data is stored in memory.
• Bitwise operations include AND, OR, XOR, and NOT.

• They are often used for tasks like setting or clearing specific bits, checking if a bit is set, or toggling bits.

• Memory layout in C determines how variables are stored in memory, including their size, alignment, and order.

• It is important to under...read more
Answered by AI
Add your answer
Q2. Explain few terms in LTE
Ans. 
LTE stands for Long-Term Evolution, a standard for wireless communication in mobile networks.
• LTE is a 4G wireless communication technology

• It provides high-speed data transmission and low latency

• LTE uses OFDMA for downlink and SC-FDMA for uplink

• LTE supports multiple antennas for improved signal quality (MIMO)

• LTE Advanced (LTE-A) is an enhanced version with higher data rates and capacity
Answered by AI
Add your answer
Q3. In one path goes wrong in mimo does snr and data both or any one goes bad
Add your answer

Q1. Basic steps for debugging
Ans. 
Debugging involves identifying and resolving issues in software or hardware systems.
• Identify the problem by reproducing the issue

• Isolate the cause by narrowing down the possible sources

• Gather relevant data and analyze it

• Develop and execute a plan to fix the issue

• Verify the fix by testing and retesting

• Document the debugging process and the solution
Answered by AI
Add your answer
Q2. What is difference between calloc and melloc
Ans. 
calloc and malloc are memory allocation functions in C. calloc initializes the allocated memory to zero, while malloc does not.
• calloc is used to allocate and initialize memory for an array of elements, while malloc is used to allocate memory for a single element.

• calloc takes two arguments - the number of elements and the size of each element, while malloc takes only the size of the element.

• calloc returns a pointer to t...read more
Answered by AI
Add your answer