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Can you explain the function of the "extern" keyword in C?
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General
Explain both the declaration vs. definition aspect and the linkage characteristics of extern, with examples of how it's commonly used in multi-file embedded projects.
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Hard Difficulty
Hard questions require advanced understanding and critical thinking. Here, your problem-solving skills are key, as these questions often involve complex scenarios needing in-depth analysis and well-structured responses.
Embedded Coding question
Embedded Coding questions assess your ability to program for resource-constrained devices. Show your understanding of hardware interfaces, memory management, real-time constraints, and efficient algorithm implementation for embedded systems.