Question

A second line is necessary to instantiate the array (since it is an object of System.Array type) and to determine the size of the array. What is the purpose of the second line in instantiating the array?

1) To initialize the elements of the array
2) To declare the type of the array
3) To allocate memory for the array
4) To determine the length of the array

Answer 1

The second line in instantiating an array is used to allocate memory for the array, which is necessary to store elements and determine its fixed size.

Step-by-step explanation:

In the context of creating arrays in programming, specifically when dealing with an object-oriented language like Java or C#, the second line of code that instantiates an array serves a specific purpose. While the first line is often used to declare the type and name of the array, the second line is used to allocate memory for the array and sets its fixed size. This is critical because the size determines how many elements the array will hold, and allocating memory is what allows the array to store elements.

The correct answer to the given question is 3) To allocate memory for the array. This step is separate from initializing the elements (which may happen automatically or require a separate set of instructions), declaring the type of the array (which is done in the first line), or determining the length of the array (the allocated memory and the length are directly related, but the length property typically becomes accessible after memory allocation).