Arizona State University (ASU) CSE100 Principles of Programming with C++ Midterm 1 Practice Exam

Accessing elements in an array in C++ is done using indexing, which starts from zero. This means that the first element of the array is accessed with index 0, the second element with index 1, and the third element with index 2. Therefore, to access the third element of an array named "arr," you would use `arr[2]`.

This indexing convention allows for straightforward retrieval of array elements, and when you write `arr[2]`, you are directly specifying to fetch the element located at that specific index in the array. This approach is a fundamental part of working with arrays in C++, as it utilizes the language's syntax and array handling capabilities correctly.

The other options provided do not conform to the proper C++ syntax for accessing array elements. For instance, using `arr[3]` would attempt to access the fourth element of the array (which doesn’t correspond to the third element), while `arr(2)` suggests a function call, which is not applicable to arrays. Lastly, `arr.get(2)` is also incorrect as the syntax `get` is not used for standard array element access in C++. Each of these options fails to reflect the proper mechanism for accessing elements based on zero