# Embedded systems engineer Interview Questions

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Embedded Systems Engineer interview questions shared by candidates### How to swap 2 variables without using a third variable. And the team leader asked to write a code snippet for assigning 5 colors to the countries on the world map so that no adjacent country has same color.

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Use XOR

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x = x + y; y = x - y; x = x - y;

### Calculate the average rain in a regions when the values are positive, List given with integers, positive and negative

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Took the sum of all positive ints in the list and divided by the count of positive ints Less

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It's essential to demonstrate that you can really go deep... there are plenty of followup questions and (sometimes tangential) angles to explore. There's a lot of Embedded Systems Engineer experts who've worked at Zoox, who provide this sort of practice through mock interviews. There's a whole list of them curated on Prepfully. prepfully.com/practice-interviews Less

### There was mostly technical questions like determine the output of a voltage divider and what it would represent in a 10-Bit decimal number?

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2^10 = 1024 so numbers range from 0-1024

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I was in that interview as well. The question was "what is the range of a 10-bit analog to digital converter?" You have a 1024-bit range with starting index of 0. Thus, 0-1023 is the correct answer. Less

### Questions were asked on Logic Design, Aptitude and also Microprocessors

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My interview was a little bit different. I applied for digital domain initially for the written exam. After clearing the written exam I was sent into the Panel of logic design(there were three panels for three domains i.e. digital, embedded, analog) wherein he asked me some questions on logic design where i was unable to answer them completely. Therefore he gave me a choice to select one among three(C programming, aptitude, logic design) for the questions to be asked. I chose aptitude. He gave me 5 puzzles in which I was able to crack 4 of them. Later I was sent to the Embedded panel where he drilled down on microprocessors. I was able to perform well there. This entire process took around 3 hours to complete. Overall it was a very good experience. They'll surely test you on your subject knowledge. Less

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Microprocessor which concept we have to learn 8085 or 8086