C Online Coding Tests

Create and send C coding assessments in 60 seconds, even if you’re not techy.
Hand over qualified C candidates for your engineering team to interview.

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About our C coding tests 

We provide your organization with realistic and useful C coding tests that accurately assess candidates’ C abilities. Even if you don’t have a technical background, you can build C code exams in under a minute using tools like CoderPad Screen.

We have created our tests to precisely cover important ideas like object-oriented programming, data structures, algorithms, and more. Our industry specialists have carefully selected them to ensure their applicability to real-world situations and their efficacy in evaluating candidates’ talents.

There is an ability to modify the tests and add their own coding activities for hiring managers who wish to go further.

  • Recommended duration: 20-60 min
  • Average number of questions: 20
  • Type of exercises: Multiple choice, coding exercises
  • Test levels: Junior, Senior, Expert

ℹ️ Explore our questions bank and test our candidate experience yourself

C sample questions

Example question 1

What is the purpose of the #include directive in C, and how is it used?

Example question 2

In this exercise, you have to analyze records of temperature to find the closer to zero.

Sample temperatures. Here, -1.7 is the closer to 0.

Implement the function closest_to_zero to return the temperature closer to zero which belongs to the array ts. The parameter size corresponds to the size of ts.


  • If ts is empty, return 0 (zero).
  • If two numbers are as close to zero, consider the positive integer as the closer to zero (eg. if ts contains -5 and 5, return 5).


  • Temperatures are always expressed with floating point numbers ranging from -273 to 5526.

ℹ️ Preview a sample coding test report

Explore Code Playback

Obtain a deeper understanding of the problem solving thought process of your developer applicants.

  • Witness their proficiency in building algorithms and evaluate their approach to solving problems with them.
  • Jot down feedback from different segments of the interview to discuss in subsequent interview rounds.
  • Pay attention to detect and prevent any distasteful actions.

How to test C Skills to hire for your team?

Relying only on resumes may not accurately paint a broad picture of a C developer’s skills and abilities, and self-reported skills may be untrustworthy.

Here are five ways to assess C developers’ coding skills:

  • Review their resume. This may give you further information about their level of language competency and the kind of C projects they have worked on.
  • To assess their C code quality, projects, and participation in C-related projects, look through their GitHub account.
  • Inquire about their use of Stack Overflow or other C communities in their regular work to ascertain their level of skill and involvement in the C development community.
  • Help C developers assess and improve their coding skills by using concrete, C-focused programming assignments.
  • Conduct live coding interviews with a C emphasis where applicants may show their coding prowess, problem-solving capabilities, and understanding of C fundamentals.

💡 To dig deeper > 5 ways to test developers’ skills before hiring

How to approach initial candidate screening effectively?

One worry raised by recruiters about giving coding tests to candidates early in the interviewing process is that it can scare applicants and deter job applications. The candidates will be able to comprehend the goal and feel at comfortable, though, if the situation is handled properly, such as by clearly defining the interview procedure and why it is vital.

You can follow these recommendations to make sure that candidates have a good experience during early testing:

  1. Job Ad: Make certain that the advertisement details each requirement and expectation related to the hiring process. In this way, the applicant won’t feel singled out and can get ready for the interview. Additionally, it is a good idea to explain in advance the time restrictions associated with technical interviews.
  1. Highlight Equal Opportunities and Diversity: Emphasize your organization’s stand on providing equal opportunities and promoting diversity through the testing process. It should be clear that the main goal of the testing is to properly assess the candidate skills irrespective of background.
  1. Concise evaluation: Focus on the abilities needed for the position and keep the evaluation succinct to prioritize quality over quantity. This will prevent any time wastage and guarantee that the applicants can complete the task without incident. The ideal test should be one that can be finished in an hour or less while still meeting all requirements.
  1. Relevance: Eliminate redundancies by ensuring the tests concentrate solely on the skills that are directly applicable to the role. Demonstrating a pragmatic approach by focusing on skills that have a practical impact on day-to-day tasks is appreciated by developers.
  2. Results and feedback: After each round of testing, give applicants feedback on how they performed. You may improve candidates’ experiences by using a product like CoderPad Screen, which automatically creates a concise report and sends it to them. Candidates who do poorly will be able to understand why they were passed over for the following round in this way.

We had no unified approach or tool to assess technical ability. Today, CoderPad Screen enables us to test against a wide selection of languages and is continually updated.

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