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

How can the delete operator affect an object in C++?

1. It manually calls the destructor

2. It deallocates memory and calls the destructor

3. It's used to call the object's constructor

4. It converts dynamic memory to static memory

The correct answer is: It deallocates memory and calls the destructor

The delete operator in C++ is used to explicitly deallocate memory that was previously allocated with the new operator. This is done by calling the destructor of the object, freeing up the memory and any other resources used by the object. Option A is incorrect because calling the destructor manually is not necessary and can lead to issues if done incorrectly. Option C is incorrect because the constructor is used to initialize an object, not delete it. Option D is incorrect because the delete operator does not convert memory from dynamic to static, but rather frees up the dynamic memory for reallocation.