Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++'

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Master C++ with our comprehensive quiz based on 'Thinking in C++'. Test your knowledge through flashcards and multiple-choice questions to enhance your understanding of C++. Prepare effectively for your exam!

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How are references initialized in C++?

  1. They can be initialized at any time

  2. They must be initialized to NULL

  3. They must be initialized when created

  4. They don't need to be initialized

The correct answer is: They must be initialized when created

References in C++ must be initialized when they are created. Unlike pointers, which can be initialized at any time and can point to NULL, references must have a valid object to refer to when they are created. If a reference is not initialized, it will result in a compile-time error. Option D is incorrect because references must always be initialized, even if it is to NULL. Option A is also incorrect because references cannot be initialized after they are created. Option B is partially correct in that references must be initialized, but it is not necessary for them to be initialized to NULL.

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