Assume int[][] x = {{1, 2}, {3, 4}, {5, 6}}, what are x.length and x[0].length?   3 and 3 You Answered  2 and 2 Correct answer  3 and 2   2 and 3

1. Break Down the Problem

We need to determine the dimensions of a 2D integer array x. Specifically, we need to identify:

• The number of rows in the array (x.length).
• The number of columns in the first row of the array (x[0].length).

2. Relevant Concepts

In Java:

• x.length gives the total number of rows in the 2D array.
• x[0].length gives the number of columns in the first row of the array.

3. Analysis and Detail

• The array x is defined as {{1, 2}, {3, 4}, {5, 6}}.
• This represents a matrix with 3 rows and 2 columns.
• Thus:
  • For x.length, since there are 3 rows, x.length = 3.
  • For x[0].length, since the first row is {1, 2}, which contains 2 elements, x[0].length = 2.

4. Verify and Summarize

• Our calculations show:
  • x.length = 3 (there are three rows in the array).
  • x[0].length = 2 (the first row has two elements).

Final Answer

The values are:

• $x.length = 3$
• $x[0].length = 2$

Therefore, the correct answer is: 3 and 2.