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3,790 c engineer interview questions shared by candidates

1.1. Find the missing element in a sorted array of ints in C. 1.2. Determine if the given char* is a palindrome in C. 2.1. Find the next node in a binary tree in C. 2.2. Find issues in given multi-threaded C code.
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Software Engineer Interview (C++)

Interviewed at Arista Networks

4★
May 22, 2017

1.1. Find the missing element in a sorted array of ints in C. 1.2. Determine if the given char* is a palindrome in C. 2.1. Find the next node in a binary tree in C. 2.2. Find issues in given multi-threaded C code.

// TODO: implement fill_array function that inserts n symbols in the array with c set to random value // TODO: Implement print_letters function that given the array prints only symbols that have c , set to be a letter ('a'-'z') // TODO: Implement reverse_array function that given the array swap the symbols containing letters , 1 a b 2 c 3 -> 1 c b 2 a 3
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C++ Software Engineer

Interviewed at Verity

3.5★
Oct 21, 2018

// TODO: implement fill_array function that inserts n symbols in the array with c set to random value // TODO: Implement print_letters function that given the array prints only symbols that have c , set to be a letter ('a'-'z') // TODO: Implement reverse_array function that given the array swap the symbols containing letters , 1 a b 2 c 3 -> 1 c b 2 a 3

If a bicycle model is moving at velocity V and heading angle θ, what is its velocity in the X and Y directions? This was the only technical question asked. While the math behind it is simple (V * cos(θ), V * sin(θ)), the interviewer showed no interest in hearing my thought process or discussing my actual experience with vehicle models, ROS, or planning systems. No questions were asked about my resume or relevant project experience.
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Senior C++ Robotics Engineer

Interviewed at Cyngn

3.9★
Jul 2, 2025

If a bicycle model is moving at velocity V and heading angle θ, what is its velocity in the X and Y directions? This was the only technical question asked. While the math behind it is simple (V * cos(θ), V * sin(θ)), the interviewer showed no interest in hearing my thought process or discussing my actual experience with vehicle models, ROS, or planning systems. No questions were asked about my resume or relevant project experience.

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