Question 1

Explain the purpose of priming and update reads in a program.

Accepted Answer

The answer of Explain the purpose of priming and update...

Question 2

What is an accumulator? What does it mean to initialize and update an accumulator in a program?

Accepted Answer

The answer of What is an accumulator? What does it...

Question 3

Write two different Do...Loop clauses that stop the loop when the value in the intAmount is less than or equal to the value in the intLimit variable.Use the Until keyword in the first clause,and use the While keyword in the second clause.

Accepted Answer

The answer of Write two different Do...Loop clauses that stop...

Question 4

Explain the difference between a looping condition and a loop exit condition.

Accepted Answer

The answer of Explain the difference between a looping condition...

Question 5

What is the Refresh method? Write the syntax for this method.

Accepted Answer

The answer of What is the Refresh method? Write the...

Question 6

What is a list box? Provide two of the Windows standards for its use on a form.

Accepted Answer

The answer of What is a list box? Provide two...

Question 7

The strCode variable contains an uppercase letter.Write two different Do...Loop clauses that process the loop instructions as long as the value in the strCode variable is either A or B.Use the Until keyword in the first clause,and use the While keyword in the second clause.

Accepted Answer

The answer of The strCode variable contains an uppercase letter.Write...

Question 8

The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
-An application allows the user to enter a salary amount.The application should then calculate and display the possible bonuses based on that salary,using bonus rates of 3-6% in increments of .5%.
' displays bonus amounts using rates
' of 3% - 6% in increments of .5%
Dim dblSalary As Decimal
Dim decBonus As Decimal
TryParse(txtSalary.Text,decSalary)
lblBonus.Text = String.Empty
For decRate As Decimal = 0.03 To 0.06 Step 0.5
decBonus = decSalary + decRate
lblBonus.Text = lblBonus.Text & decRate.ToString("P1")& " " & decBonus.ToString("C2")& ControlChars.NewLine
Next decRate

Accepted Answer

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

Question 9

Write a pretest loop that adds together the integers 2,4,6,8,10,12,14,16,18,and 20.Use the intNum variable to keep track of the integers.Store the result in the intResult variable (which contains the number 0).Use the For...Next statement.

Accepted Answer

The answer of Write a pretest loop that adds together...

Question 10

Case 1 - XYZ Solutions
You have just started working for XYZ Solutions as a programmer. Your first assignment is to review and correct various code so that you can become familiar with the company’s programs.
-Your supervisor wants you to change the Do...Loop in the previous problem to a For...Next loop.He also wants the message to display only three times.Which of the following For clauses should you use?

Accepted Answer

Since the supervisor wants the message to display only three times, we need to loop only three times. Therefore, we should use the For clause that starts from 1 and loops to 3. Hence, B is the correct choice.

Question 11

The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
-'fill list boxes with values for men's pant sizes for
'pant waist and pant length
For intWaist As Double = 28 to 46
lstWaist.Items(intWaist.ToString("N0"))
Next intWaist
SelectedItem = "28"
For intLength As Integer = 26 to 36 Step .5
lstLength.Items.Add(dblLength.ToString("N1"))
Next dblLength
lstLength.SelectedIndex = "26"

Accepted Answer

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

Question 12

Case 1 - XYZ Solutions
You have just started working for XYZ Solutions as a programmer. Your first assignment is to review and correct various code so that you can become familiar with the company’s programs.
-You changed the Do clause to the correct For clause in the previous problem.You also changed the Loop keyword to the Next keyword for the For...Next loop.What else needs to be changed about the Do loop?

Accepted Answer

When converting a Do loop to a For loop, the explicit declaration and incrementation of the counter variable, which are necessary in a Do loop, become redundant because the For loop syntax inherently includes initialization, condition checking, and incrementing of the counter variable.

Question 13

Write a pretest loop that adds together integers from 1 to 50.Use the intNumber variable (which contains the number 1)to keep track of the integers.Store the result in the intResult variable (which contains the number 0).Use the Do...Loop statement and the While keyword.

Accepted Answer

The answer of Write a pretest loop that adds together...

Question 14

Explain the difference between using the keywords While and Until within a Do...Loop statement.

Accepted Answer

The answer of Explain the difference between using the keywords...

Question 15

Write a counter-controlled loop that adds 5,10,15,20,25,and 30 to the lstMinutes control.

Accepted Answer

The answer of Write a counter-controlled loop that adds 5,10,15,20,25,and...

Question 16

Write the assignment statements needed to increment the intCount counter by 1 and update the decBalance variable by the value stored in the decOrderAmount variable.

Accepted Answer

The answer of Write the assignment statements needed to increment...

Question 17

What is a counter? What does it mean to initialize and update a counter in a program?

Accepted Answer

The answer of What is a counter? What does it...

Question 18

Explain the difference between a pretest loop and a posttest loop.

Accepted Answer

The answer of Explain the difference between a pretest loop...

Question 19

What is a counter-controlled loop and when is it used in a program? What statement provides the most efficient way to write a counter-controlled loop?

Accepted Answer

The answer of What is a counter-controlled loop and when...

Question 20

Case 1 - XYZ Solutions
You have just started working for XYZ Solutions as a programmer. Your first assignment is to review and correct various code so that you can become familiar with the company’s programs.
-The following code in a different program is not working properly.The message should display the value of the intCounter variable if the intCounter variable contains a balance that is less than or equal to 15.The message does not display.What mistake did the previous programmer make? intCounter = 1
Do Until intCounter <= 15
MessageBox.Show(intCounter)
IntCounter += 1
Loop

Accepted Answer

The code is currently using the "Do Until" loop which will continue looping until the condition is false, meaning intCounter is greater than 15. To display the value of intCounter if it is less than or equal to 15, the "While" keyword should be used instead to check if intCounter is less than or equal to 15 and only loop while that condition is true.

Quiz 6: The Repetition Structure