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 the purpose of returning by value as a const in operator overloading?

To modify the operand
To avoid modifications on temporary objects
To allow changes on the returned object
To enforce type safety

The correct answer is: To avoid modifications on temporary objects

When overloading an operator, returning by value as a const ensures that the returned object cannot be modified. This is done to avoid any potential modifications on temporary objects, which can lead to unexpected behavior in the code. Option A is incorrect because operator overloading should not modify the operands, but rather perform an operation on them. Option C is incorrect because using const indicates that the returned object should not be modified. Option D is incorrect because enforcing type safety is not the primary purpose of returning by value as a const in operator overloading.