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!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is NOT allowed for a union in C++?

Having member functions
Including constructors and destructors
Being used as a base class during inheritance
Having access control modifiers

The correct answer is: Being used as a base class during inheritance

Unions in C++ are not allowed to be used as base classes during inheritance. This is because unions only store one variant of data at a time, which can lead to issues when using inheritance. It is possible for the derived class to end up with incorrect data types and values when inheriting from a union class. All other options are allowed for a union in C++, including member functions, constructors and destructors, and access control modifiers.