What numbers are displayed in the list box when the button is clicked on?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim file As String = "Beatles.txt"
Dim fabFour As String = FillArray(file)
lstBox.Items.Add(Array.IndexOf(fabFour, "Ringo")
lstBox.Items.Add(fabFour.Count - 1)
End Sub
Function FillArray(file As String) As String
Dim names As String = IO.File.ReadAllLines(file)
Return names
End Function
Assume the four lines of the file Beatles.txt contain the following entries: John, Paul, Ringo, George.
A) 3 and 3
B) 3 and 4
C) 2 and 3
D) 2 and 4

Question

What numbers are displayed in the list box when the button is clicked on? 
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click 
Dim file As String = "Beatles.txt" 
Dim fabFour As String = FillArray(file) 
lstBox.Items.Add(Array.IndexOf(fabFour, "Ringo") 
lstBox.Items.Add(fabFour.Count - 1) 
End Sub
 Function FillArray(file As String) As String 
Dim names As String = IO.File.ReadAllLines(file) 
Return names 
End Function 
Assume the four lines of the file Beatles.txt contain the following entries: John, Paul, Ringo, George.
A) 3 and 3
B) 3 and 4
C) 2 and 3
D) 2 and 4

Quizplus · Accepted Answer

The `Array.IndexOf(fabFour, "Ringo")` will return 2 because arrays are zero-indexed and "Ringo" is the third name in the list. `fabFour.Count - 1` will return 3 because `Count` will be 4 (the number of elements in the array) and subtracting 1 from it gives 3.

What Numbers Are Displayed in the List Box When the Button