Microsoft

HR is very nice and gives very helpful support. The interview process includes 5 rounds, and every round requires solving an algorithm problem and writing code on a whiteboard. You also need to write some tests to go through your code.

Code Review or Design Interview: For technical roles, there may be a code review or system design interview during the on-site process. You might be asked to solve problems on a whiteboard or demonstrate your approach to designing systems.

Ask about basic embedded interfaces like SPI and I2C. Discuss algorithms to sort data. Then, ask very detailed questions about the projects I have done before, using C++11 standard library.