C Software Interview Questions

5,471 c software interview questions shared by candidates

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.

Easy question: Read in a string of words separated by spaces in which some words are quoted and output the words 1 line at a time with quotes if applicable. Something like that. This question which was last and I didn't have time to manually enter every character into the HackerEarth "IDE" before the test timed out. I wasn't sure if I could jump back and forth between questions on HackerEarth platform and didn't want to risk it at the time but wish I would have jumped to this question first before the first coding question which was physics type of problem solving exercise not sure why since I'm not a physicists and this was a Health Care HSA applications related software engineering role. My opinion, HackerEarth s*cks and so does any company hiring this way and even if on a whiteboard if asking questions like the physics related one for line of business applications.
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C#/.NET Enterprise Software Engineer

Interviewed at HealthEquity Inc.

3.2
Dec 4, 2018

Easy question: Read in a string of words separated by spaces in which some words are quoted and output the words 1 line at a time with quotes if applicable. Something like that. This question which was last and I didn't have time to manually enter every character into the HackerEarth "IDE" before the test timed out. I wasn't sure if I could jump back and forth between questions on HackerEarth platform and didn't want to risk it at the time but wish I would have jumped to this question first before the first coding question which was physics type of problem solving exercise not sure why since I'm not a physicists and this was a Health Care HSA applications related software engineering role. My opinion, HackerEarth s*cks and so does any company hiring this way and even if on a whiteboard if asking questions like the physics related one for line of business applications.

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