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!

Practice this question and more.

What common approach do C++ compilers use to support the virtual function mechanism?

Dynamic memory allocation
Function inlining
A virtual table (VTABLE) and a virtual pointer (VPTR)
Lambda functions

The correct answer is: A virtual table (VTABLE) and a virtual pointer (VPTR)

C++ compilers use a virtual table (VTABLE) and a virtual pointer (VPTR) to support the virtual function mechanism. This is because it allows them to effectively link the virtual functions to their appropriate implementations in order to handle polymorphism at runtime. Dynamic memory allocation may be used for allocating objects and their associated virtual tables, but it is not the actual approach used for the virtual function mechanism. Function inlining is a compiler optimization technique and does not specifically relate to virtual functions. Lambda functions, while a feature in C++, do not directly support the virtual function mechanism and are not linked to virtual tables.