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.

How does the C++ compiler ensure that a call to a virtual function binds to the correct function body at runtime?

By creating a fixed function lookup table at compile time
Using a virtual table (VTABLE) and a virtual pointer (VPTR) mechanism
By recompiling parts of the code at runtime
C++ does not support runtime binding

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

The C++ compiler ensures that a call to a virtual function binds to the correct function body at runtime by using a virtual table (VTABLE) and a virtual pointer (VPTR) mechanism. This means that there is a table of function pointers that the compiler creates at compile time, and a virtual pointer references this table at runtime to determine which function to call. Option A is incorrect because the virtual table is not fixed and can be modified at runtime. Option C is also incorrect because the code itself is not recompiled, but the virtual table is dynamically updated. Option D is also incorrect because C++ does support runtime binding through the use of virtual functions.