Question 1

Write the statement to declare a procedure-level two-dimensional array named dblRates using the following table of data:
 $$\begin{array} { | l | l | } 
\hline 5 & 5.75 \
\hline 6 & 6 \
\hline 7 & 6.25 \
\hline 8 & 6.5 \
\hline 9 & 6.75 \
\hline
\end{array}$$

Accepted Answer

The answer of Write the statement to declare a procedure-level...

Question 2

Case 1 - Tony’s Pizza & Pasta
The restaurant uses an application to update and display menu items and the related price information.
-You have decided the Daily "Chef's Specials" need to be stored in a two-dimensional array rather than two parallel one-dimensional arrays.Which of the following statements will declare the array as a procedure-level array named strDailySpecial? The number of rows is based on the number of days in the week,and Sunday remains the first element for the days of the week.
A)Dim strDailySpecial(6, 1) As String
B)Dim strDailySpecial(7, 2) As String
C)Dim strDailySpecial(1, 6) As String
D)Dim strDailySpecial(2, 7) As String

Accepted Answer

This declaration creates a 2-dimensional array with 7 rows (corresponding to the 7 days of the week) and 2 columns (for the name and description of the daily special). Sunday will be the first row since arrays are 0-based in VB.NET.

Question 3

Write the statements to traverse the strCategory array and display each element's value in the lstCategory control.Use a For Each...Next statement.

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Question 4

How do the elements in parallel one-dimensional arrays relate to each other? Provide an example.

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Question 5

Explain the difference between a simple variable and an array.

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Question 6

The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
-Private Sub btnGetHighest_Click(ByVal sender As Object,ByVal e As System.EventArgs)Handles btnGetHighest.Click
' displays the highest prize amount and the
' number of people who won that amount
Dim intPrizes(10)As Integer = {50,25,100,25,100,
25,75,50,40,60}
Dim intHighSub As Integer = intPrizes.GetHighest()
Dim intHighPrize As Integer = intPrizes(0)
Dim intWinners As Integer = 1
For intX As Integer = 1 To intHighSub
If intPrizes(intX)= intHighPrize Then
intWinners *= 1
Else
If intPrizes(intX)< intHighPrize Then
intHighPrize = intPrizes(intX)
intWinners = 1
End If
End If
Next intX
lblHighest.Text = intHighPrize.ToString("C0")
lblWinners.Text = intWinners.ToString
End Sub

Accepted Answer

The answer of The following sample of code contains errors....

Question 7

The following array is declared and initialized:
Dim dblMilesPerTrip()As Double = {542,28,79.5,322.6,114}
Write the statements to total the values in the array.

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Dim...

Question 8

Write the statement to declare a twelve-row,two-column procedure-level array named strLocations,initializing each element to the keyword Nothing.

Accepted Answer

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Question 9

Write the statement to declare a seven-element procedure-level array named strItemCode with each element initialized to the keyword Nothing.

Accepted Answer

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Question 10

Case 1 - Tony’s Pizza & Pasta
The restaurant uses an application to update and display menu items and the related price information.
-Daily "Chef's Specials" are stored using two one-dimensional parallel arrays.The days of the week are stored in the strDays array,with Sunday as the first element.The daily special for each day is stored in a parallel array named strSpecial.Which of the following statements assigns Friday's special,which is rigatoni,to the appropriate element?
A)strSpecial(6) = rigatoni
B)strSpecial(5) = rigatoni
C)strSpecial(6) = "rigatoni"
D)strSpecial(5) = "rigatoni"

Accepted Answer

Since Sunday is the first element, Friday would be the fifth element in the array. Also, since "rigatoni" is a string and not a variable, it needs to be enclosed in quotes. Therefore, the correct statement would be strSpecial(5) = "rigatoni".

Question 11

Write the statement to declare a five-element procedure-level array named decGPA,and initialize the array with the following values: 2.58,3.85,3.6,1.45,2.75.Then write a statement to assign the number 2.55 to the last element in the array.

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Question 12

Write the statement that assigns the string "Treasurer" to the element located in the third row,second column in the strOfficers array.

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Question 13

The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
-Private Sub btnDisplay_Click(ByVal sender As Object,ByVal e As System.EventArgs)Handles btnDisplay.Click
' displays the pay rate associated with a pay code
Dim strCodes()As String = {PT1,PT2,FT1,FT2,FT3}
Dim dblRates()As Integer = {10.5,12,13.5,14}
Dim strSearchForCode As String
Dim intSub As Integer
' assign the code to a variable
txtCode.Text = strSearchForCode
' search the strCodes array for the pay code
' continue searching until the end of the array
' or the pay code is found
Do Until intSub > strCodes.Length OrElse
strSearchForCode = strCodes(intSub)
intSub = intSub + 1
Loop
' determine whether the pay code was found
If intSub < strCodes.Length Then
lblRate.Text = dblRates(1).ToString("C0")
Else
MessageBox.Show("Invalid Pay Code",
"Employee Pay Application",
MessageBoxButtons.OK,
MessageBoxIcon.Information)
End If
txtCode.Focus()
End Sub

Accepted Answer

The answer of The following sample of code contains errors....

Question 14

Write the statement to declare a six-element class-level array named strAnimal,and initialize the array with the following values: dog,cat,mouse,bird,snake,fish.

Accepted Answer

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Question 15

Describe two advantages to using arrays to store data.

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Question 16

Write the statements to traverse the strCategory array and display each element's value in the lstCategory control.Use a Do...Loop statement.

Accepted Answer

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Question 17

Write the statement that assigns the length of the strBooks array to the intNumElements variable.Then write the statement that assigns the highest subscript in the array to the intHighestSub variable.

Accepted Answer

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Question 18

Write the statement to declare a four-element procedure-level array named intNum with each element initialized to 0.Then write the statements necessary to add the number 5 to each element in the intNum array.

Accepted Answer

The answer of Write the statement to declare a four-element...

Question 19

Case 1 - Tony’s Pizza & Pasta
The restaurant uses an application to update and display menu items and the related price information.
-Which of the following statements assigns the daily special of lasagna to Tuesday?
A)strDailySpecial(3, 2) = lasagna
B)strDailySpecial(3, 2) = "Tuesday"
C)strDailySpecial(2, 1) = "lasagna"
D)strDailySpecial(3, 2) = "lasagna"

Accepted Answer

Option C correctly assigns the string "lasagna" to a hypothetical array or data structure at the position that likely represents Tuesday (the second day of a typical week, assuming the array is 0-indexed) and the first item of that day, which could represent the daily special.

Question 20

The following array is declared and initialized:
Dim dblMilesPerTrip()As Double = {542,28,79.5,322.6,114}
Write the statements to sort the values in the array in descending order.

Accepted Answer