Consider the following 2-dimensional array.Which expression gives the number of elements in the third row?
A)counts[2].size()
B)counts.length[2]
C)counts.length
D)counts[2].length

Question

Consider the following 2-dimensional array.Which expression gives the number of elements in the third row?  
A)counts[2].size() 
B)counts.length[2] 
C)counts.length 
D)counts[2].length

Quizplus · Accepted Answer

The number of elements in the third row can be determined by accessing the length of the array at index 2 (since arrays are 0-indexed). Therefore, the expression that gives the number of elements in the third row is `counts[2].length`. Option A would give the same result, as `counts[2].size()` is equivalent to `counts[2].length`, but it is not commonly used for arrays. Option B is incorrect because arrays do not have a `length` property for each index, but rather a `length` property for the entire array. Option C gives the length of the entire array, which is not useful for finding the number of elements in a single row.

Consider the Following 2-Dimensional Array