When initializing a 2D array with int arr[2][3];, how many elements will it contain?

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Study for the University of Central Florida EGN3211 Final Exam. Practice with flashcards and multiple choice questions, each question with hints and explanations. Prepare effectively and boost your engineering analysis and computation skills for success!

When you declare a two-dimensional array in C, such as int arr[2][3];, it consists of rows and columns defined by the dimensions in the brackets. In this case, you have specified there will be 2 rows and 3 columns.

To calculate the total number of elements in this 2D array, you multiply the number of rows by the number of columns. Therefore, with 2 rows and 3 columns, the calculation is as follows:

2 (rows) * 3 (columns) = 6 elements.

Thus, the 2D array arr will indeed contain 6 elements, confirming that option A is the correct choice. This understanding is crucial in programming because knowing how many elements are actually allocated in memory can influence how you access and manipulate the array data structure effectively.