In 2nd round it was a Technical interview, so they asked to swap two numbers without using the temp variable, how to set a bit using bitwise operators. what are the constructor and basic class definitions? Along with this some questions on embedded like familiarity with Different Microcontrollers and protocols like UART, I2C, and SPI, Difference between Memory-mapped I/O and I/O mapped I/O, and what is interrupt request, Remaining time was all about my project and Hackathon discussion.