lots of concurrency related questions
Embedded Software Developer Interview Questions
6,907 embedded software developer interview questions shared by candidates
Ex: Debugging with gdb, semaphores/ mutexes
Aligned malloc, software timer implementation, pointer access/memory layout/memory access faults, matrix manipulation.
Inter process communication & deadlock
-Recruiter cold called after my resume was submitted for another position. -Applied to a DSP FW engineer position - 1st round - Technical + behavioral + resume based questions with Hiring Manager - Got positive feedback, but manager wants me to interview for a different position (virtual onsite interview) - Applied to the position, not exactly matching but there was some relevance - Onsite (6 rounds total including with recruiter) -1st round - General questions around embedded systems, resume based, Q format values. 1 coding - find number of 1's in a number - 2nd round - Technical questions around Wireless communications, FFT's, how to decide on FFT length for a certain sample rate. (Found it difficult as wireless is not what I prepared for) - 3rd round - Discussion around my resume, some questions and probing around embedded system design. Coding questions including - find size of structure which has variable specifying bit field, code a function to change endianness of a value - 4th round - With manager, again discussion on resume, technical aspects of the job (This was a light round in terms of technicality) - 5th round - Technical questions on Wireless communication, different modulation. One coding question to convert soft bits of qpsk to hard bits where size of soft bits is 6 bits in a continuous data stream. - Recruiter round was about why apple, why did you leave last job, why are you looking to switch now.
Q. Design a Circular buffer for a UART based peripheral that receives streaming data at a given baud rate. Q. How can you ensure that DMA callbacks write to certain area in memory instead of the default SRAM?
your experience on resume, volatile, bit manipulation, find bugs in the C code
Medium level leetcode question related to arrays and string manipulation.
Build a system that opens a door with a microcontroller.
Technical f2f will be on all topics starting from c basics to linux. They can question from any topic. But the difficulty depends on the type of background we came(EEE/ECE/CS) from and our c programming knowledge.
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