Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++'

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Test your C++ skills with our quiz based on Bruce Eckel's 'Thinking in C++'. Dive into object-oriented programming, advanced topics, and fundamentals. Perfect for learners and experts alike. Assess your knowledge and become a C++ master!

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What is a potential risk of casting away constness of a variable?

Increased memory usage
Breaking code safety and possibly introducing bugs
Improving code performance
None, it's always safe

The correct answer is: Breaking code safety and possibly introducing bugs

When a variable's constness is cast away, it means that the variable can now be modified even though it was declared as const. This can lead to potential issues with code safety and introduces the risk of bugs. Modifying a variable that was intended to be constant can lead to unintended consequences and errors in a program. Options A and C are incorrect because casting away constness does not directly impact memory usage or code performance. Option D is incorrect because casting away constness does introduce a potential risk.