C Programmer Interview Questions

3,509 c programmer interview questions shared by candidates

**Interview Questions:** 1. Can you explain how the Garbage Collector works in .NET and its significance? 2. We provided a LeetCode easy-level problem related to arrays. The challenge was to identify a specific pattern and manipulate array elements accordingly. 3. A practical SQL problem was given where the task was to combine data from multiple tables using JOIN operations. The scenario tested the understanding of INNER JOIN, LEFT JOIN, and RIGHT JOIN, as well as the ability to filter and sort the merged data set.
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C# Developer

Interviewed at Motorola Solutions

4.2
Oct 10, 2023

**Interview Questions:** 1. Can you explain how the Garbage Collector works in .NET and its significance? 2. We provided a LeetCode easy-level problem related to arrays. The challenge was to identify a specific pattern and manipulate array elements accordingly. 3. A practical SQL problem was given where the task was to combine data from multiple tables using JOIN operations. The scenario tested the understanding of INNER JOIN, LEFT JOIN, and RIGHT JOIN, as well as the ability to filter and sort the merged data set.

Onsite. How to prevent iterator invalidation? How to do memory management for std::map. std::sort and how to handle it efficiently using custom function, lambda function,...A medium LC question related to sliding window and max heap. compile time error check. How to work with very big number that go above the range for long long int.
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Senior C++ Developer

Interviewed at Intercontinental Exchange

3.3
Nov 16, 2024

Onsite. How to prevent iterator invalidation? How to do memory management for std::map. std::sort and how to handle it efficiently using custom function, lambda function,...A medium LC question related to sliding window and max heap. compile time error check. How to work with very big number that go above the range for long long int.

1. Modern C++11, 14,17, 20 features. They asked what i know from C++23/26 as well. I said that i don't remember. 2. Mostly, we can expect what they can ask from C++. Be clear about C++ concepts. For example: All types of constructors, explicit usage, auto, decltype, threads, async programming. STL, search and sorting and time complexity. 3. Prepare few well-known coding logics. 4. They did not focus on how a process handles concurrent connections using select, pselect, poll or epoll. Their main focus was how deep you know the modern C++ and are you able to think and implement some logic.
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Senior C++ Developer

Interviewed at Intercontinental Exchange

3.3
Aug 8, 2024

1. Modern C++11, 14,17, 20 features. They asked what i know from C++23/26 as well. I said that i don't remember. 2. Mostly, we can expect what they can ask from C++. Be clear about C++ concepts. For example: All types of constructors, explicit usage, auto, decltype, threads, async programming. STL, search and sorting and time complexity. 3. Prepare few well-known coding logics. 4. They did not focus on how a process handles concurrent connections using select, pselect, poll or epoll. Their main focus was how deep you know the modern C++ and are you able to think and implement some logic.

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