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 will be the effect of using a global variable in a C++ program?

It can only be accessed within the function it is declared
It reduces the program's execution time
It is available to all parts of the program
It automatically initializes to null

The correct answer is: It is available to all parts of the program

Using a global variable in a C++ program means that the variable can be accessed by any function within the program. This can be useful for when you need to use the same variable in multiple functions. However, it is important to note that global variables can also lead to potential issues such as accidental overwriting and unintended changes. Option A is incorrect because local variables, which are declared within a function, can only be accessed within that function. Option B is incorrect because using a global variable does not affect the execution time of a program. Option D is incorrect because the value of a global variable is not automatically set to null, it depends on how the variable is declared.