Question 1

Describe two advantages to using arrays to store data.

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Question 2

Case-Based Critical Thinking Questions 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

The correct statement should assign rigatoni to Friday's special, which is stored in the 5th element of the array. Also, since rigatoni is a string, it should be enclosed in double quotes. Therefore, the correct statement is strSpecial(5) = "rigatoni".

Question 3

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.

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Question 4

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 5

Explain the difference between a simple variable and an array.

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Question 6

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

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Question 7

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 8

Write the statement to declare a procedure-level two-dimensional array named dblRates using the following table of data:

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Question 9

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 10

Case-Based Critical Thinking Questions 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"

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Question 11

Case-Based Critical Thinking Questions 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

In the given scenario, a two-dimensional array is required to store the Daily "Chef's Specials" where the number of rows will be based on the number of days in a week, and Sunday will be the first element for the days of the week. Option A declares the array with 6 rows (based on the number of days in a week) and 1 column (to store the menu item for each day). Therefore, Option A is the best choice. Option B declares the array with 7 rows and 2 columns, which is not required in the given scenario. Option C declares a one-dimensional array with 1 row and 6 columns, which is not suitable for storing the Daily "Chef's Specials". Option D declares an array with 2 rows and 7 columns, which does not meet the requirement of storing the menu items for each day in a week.

Question 12

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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Question 13

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.

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Question 14

Problems - Correcting Logic and Code Errors 
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 = intPrizes(intX) 
intWinners = 1 
End If 
End If 
Next intX 
lblHighest.Text = intHighPrize.ToString("C0") 
lblWinners.Text = intWinners.ToString 
End Sub

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Question 15

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

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Question 16

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.

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Question 17

Problems - Correcting Logic and Code Errors 
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 
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

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Question 18

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

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Question 19

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.

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Question 20

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

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