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Software Developer C Interview Questions

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5,472 software developer c interview questions shared by candidates

1) What is multithreading? 2) How do you create threads and how do you resolve thread issues? 3) How would you update an UI element when two threads are accessing it simultaneously? 4) How would you prevent two instances of an application from opening? 5) What is async programming and how to create task based method? 6) Out vs Ref? 7) What is Dependency injection? 8) Did you work between managed and unmanaged codes (C++ and C#)? 9) Which design patterns did you use? What is singleton? 10) What is background worker? 11) Do you have any question?
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C#/Winform Developer

Interviewed at Schneider Electric

4.2★
Sep 27, 2018

1) What is multithreading? 2) How do you create threads and how do you resolve thread issues? 3) How would you update an UI element when two threads are accessing it simultaneously? 4) How would you prevent two instances of an application from opening? 5) What is async programming and how to create task based method? 6) Out vs Ref? 7) What is Dependency injection? 8) Did you work between managed and unmanaged codes (C++ and C#)? 9) Which design patterns did you use? What is singleton? 10) What is background worker? 11) Do you have any question?

4 tasks in Codility. The first one was about C++ basics like dynamic_cast etc, 4-choice Second one classic parsing exercise in C++ using string, maps, arrays, however very badly specified so that correct solution was simply not feasible in given time, unless you neglect most possible inputs and "go straight to dumbest implementation" that might or might not pass Codility scoring test. Third question is about dynamic programming, in-depth search of cheapest route. Fourth was numerical exercise, relative calculation on angles maybe easy but certainly might be tricky.
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C++ Senior Software Developer

Interviewed at TomTom

3.8★
Aug 19, 2021

4 tasks in Codility. The first one was about C++ basics like dynamic_cast etc, 4-choice Second one classic parsing exercise in C++ using string, maps, arrays, however very badly specified so that correct solution was simply not feasible in given time, unless you neglect most possible inputs and "go straight to dumbest implementation" that might or might not pass Codility scoring test. Third question is about dynamic programming, in-depth search of cheapest route. Fourth was numerical exercise, relative calculation on angles maybe easy but certainly might be tricky.

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