C Programming Interview Test: Theory and Code Review

Prepare for C programming interviews by testing and strengthening both your theoretical knowledge and practical code analysis skills.

This course is designed around interview-style questions covering the most important areas of the C programming language. You will review fundamental concepts such as data types, operators, control flow, functions, arrays, pointers, structures, storage duration, type conversions, and the preprocessor.

The course also focuses on topics that frequently cause problems in real software projects and technical interviews. These include pointer misuse, buffer overflows, memory leaks, dangling pointers, use-after-free errors, integer overflow, undefined behavior, incorrect allocation sizes, string handling mistakes, and operator-precedence bugs.

In addition to theoretical questions, you will examine short C code samples and determine what they do, whether they are valid, and how they can be improved. Each question includes the correct answer and a detailed explanation. Incorrect choices are also explained so that you can understand not only which answer is correct, but why the alternatives are wrong.

The questions use a mixture of multiple-choice, multiple-selection, fill-in-the-blank, debugging, and code-review formats. This structure helps you practise the types of problems commonly encountered during technical screenings and developer interviews.

This course is suitable for students, junior developers, embedded software engineers, and experienced programmers who want to refresh their C knowledge. By completing the tests, you will identify knowledge gaps, improve your code-review skills, and approach C programming interviews with greater confidence.