They asked me about my experience with SPI and I2C, and what the differences between them are.
Firmware Development Engineer Interview Questions
2,356 firmware development engineer interview questions shared by candidates
What is Flashing? and Could you describe Firmware architecture?
How to convert 5 volt signal to 3.3 volt logic?
Pointers, TCP and UDP, debugging, past projects
Given a sequence of positive integers, always incrementing by 1 (i.e. 1, 2, 3, .... n+1), write a function that returns only the ODD values (in the same order)
Basic OS, Bitwise manipulations
How do you detect loops in linked list?
Reverse the elements in an array
How to debug if the image stored in flash is incorrect or has a problem?
1st round - Was asked questions 1, 2, 5, 8 and 12 from this list: https://rmbconsulting.us/publications/a-c-test-the-0x10-best-questions-for-would-be-embedded-programmers/ 2nd round - 6 sessions of 45 mins each with different members of the team 1st session - write memcpy in assembly 2nd session - implement count #1s in a var, discussed pipelining 3rd session - implemebt bitwise pair switch in C, design on a whiteboard a digital circuit that would model behaviour from a given timing diagram 4th session - implement fct that tells you if number has an even or odd # of 1s, read over a piece of buggy code and fix it, discuss I2C protocol 5th session - given an array, return number that appears most often 6th session - explain LD r2, mem ; ADD R2,R3 at pipeline level explain ld instruction at memory management, how that address gets translated from virtual to physical address write code to get 64 bit timer from two 32 bit registers Write enqueue and dequeue for circular buffer
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