Final answer:
The statement is True for strongly typed languages where a 2D array must consist of elements of the same type, whether primitive or object, to ensure type safety. However, dynamically typed languages allow for different types within the same array.
Step-by-step explanation:
The statement that each element in a 2D array must be of the same type, either primitive or object, is True. In programming, when you define a two-dimensional array, you specify the type of all the elements it will hold. This is because, under the hood, a 2D array is actually an array of arrays, and the type declaration applies uniformly across all these nested arrays.
For example, in Java, if you declare an array like this: int[][] my2DArray = new int[10][20];, you are creating a 2D array that will hold integers only. Similarly, if you create an array with String[][] my2DArray = new String[10][20];, this array is meant for String objects. The language enforces strict type consistency to prevent runtime errors and ensure type safety.
Therefore, it's not possible to have, for example, an integer and a string in the same 2D array in strongly typed languages like Java or C#. However, in dynamically typed languages like Python or JavaScript, you can mix types within an array because these languages are more flexible about types.