Deck 4: The Selection Structure

Question 1

The ____ operator is evaluated last in the following expression: 9 * 2 - 8 > 5 + 2 / 2.

A) -
B) +
C) >
D) *

Answer 1

C

Question 2

You can include an identifying label on a group box by setting the group box's Identity property.

Answer 2

False

Question 3

The expression 12 > 0 AndAlso 12

Answer 3

True

Question 4

If the intInventory variable contains the value 28, the condition If intInventory will evaluate to ____.

A) Yes
B) No
C) True
D) False

Question 5

The diamond symbol is used in a flowchart for a calculation task.

Question 6

The ____ operator is evaluated first in the following expression: 9 * 2 - 8 > 5 + 2 / 2.

A) -
B) +
C) >
D) *

Question 7

The Not operator would make a True statement False, but would not make a False statement True.

Question 8

A programmer must phrase the condition of a selection structure so that it results in either a true or a false answer only.

Question 9

Comparison operators are also referred to as ____ operators.

A) relational
B) arithmetic
C) logical
D) Boolean

Question 10

Comparison operators are always evaluated after arithmetic operators in a conditional expression.

Question 11

Which of the following has the most limited scope?

A) a variable declared at the beginning of a procedure
B) a variable declared within the true path of a selection structure
C) a static variable declared at the beginning of a procedure
D) a class-level variable

Question 12

If dblMiles >= 500 Then dblMiles = dblMiles * 0.45
Else
DblMiles = dblMiles * 0.25
End If
The dblMiles variable contains the number 575 before the code above is processed. What value will be in the variable after the code is processed?

A) 0
B) 143.75
C) 225
D) 258.75

Question 13

The expression 2 * 3 + 1 > 1 * 2 + 3 Or 7 + 2

Question 14

The And operator always checks both conditions, while the AndAlso operator does not always evaluate the second condition.

Question 15

Before using a string in a comparison, you can use either the ToUpper method or the ToLower method to convert the string to uppercase or lowercase, respectively, and then use the converted string in the comparison.

Question 16

A variable that has ____ scope can be used anywhere within the procedure.

A) block
B) statement
C) method
D) procedure

Question 17

Use the ____ flowchart symbol to represent the condition in both the selection and repetition structures.

A) oval
B) rectangle
C) parallelogram
D) diamond

Question 18

What is the value of the following expression: 9 * 2 - 8 > 5 + 2 / 2?

A) 10
B) 6
C) False
D) True

Question 19

Which of the following conditions will evaluate to True when the intPackages variable contains the value 100?

A) If intPackages = 100 Then
B) If intPackages 0 Then
C) If intPackages > 1 Then
D) All of the above would evaluate to True.

Question 20

When coding a selection instruction in Visual Basic, the code that follows the Else statement includes those instructions that will be executed when the condition is true.

Question 21

Logical operators are sometimes referred to as ____ operators.

A) relational
B) arithmetic
C) comparison
D) Boolean

Question 22

You use the ____ method to select all of the text contained in a text box.

A) All
B) SelectAll
C) AllText
D) GetAll

Question 23

In the MessageBox.Show( text , caption , buttons , icon [, defaultButton ]) method, which of the following arguments controls the symbol appearing in the message box?

A) text
B) caption
C) buttons
D) icon

Question 24

The Backspace key is represented by the ____ constant.

A) ControlChars.Back
B) ControlChars.BackSpace
C) ControlChars.Backspace
D) ControlChars.Backspc

Question 25

A control's ____ event occurs each time the user presses a key while the control has the focus.

A) PressEnter
B) KeyEnter
C) KeyPress
D) FocusPress

Question 26

Case-Based Critical Thinking Questions Case 1 - Jack of All Trades
Jack of All Trades rents small power equipment to commercial and residential customers. The strCustomer variable is used to determine whether a customer is commercial (C) or residential (R). Commercial customers receive a 10% discount if they are members of the Rental Rewards Program. Residential customers receive a 5% discount if they are members.
Which of the following If clauses would evaluate to True and apply the 10% discount for a commercial customer?

A) If strCustomer "C" AndAlso strMember "Y"
B) If strCustomer = "C" AndAlso strMember = "Y"
C) If strCustomer "R" OrElse strMember = "Y"
D) If strCustomer = "C" OrElse strMember = "Y"

Question 27

A text box's ____ event occurs when the text box receives the focus.

A) Focus
B) It
C) Key
D) Enter

Question 28

In the MessageBox.Show( text , caption , buttons , icon [, defaultButton ]) method, which of the following arguments controls the words appearing on the message box title bar?

A) text
B) caption
C) buttons
D) icon

Question 29

Consider the expression 3 * 2 ^ 2 15 - 3. Which operation is performed second?

A) ^
B) /
C) *
D) +

Question 30

If the intQuantity and decPrice variables contain the numbers 3 and 15.75, respectively, the condition If intQuantity > 0 AndAlso intQuantity 20 will evaluate to ____.

A) True
B) False
C) Yes
D) No

Question 31

To prevent a text box from accepting inappropriate characters, you first use the e parameter's ____ property to determine the key that the user pressed.

A) KeyStruck
B) KeyEnter
C) KeyChar
D) KeyPress

Question 32

Consider the expression 3 * 2 ^ 2 15 - 3. Which operation is performed first?

A) ^
B) /
C) *
D) +

Question 33

Case-Based Critical Thinking Questions Case 1 - Jack of All Trades
Jack of All Trades rents small power equipment to commercial and residential customers. The strCustomer variable is used to determine whether a customer is commercial (C) or residential (R). Commercial customers receive a 10% discount if they are members of the Rental Rewards Program. Residential customers receive a 5% discount if they are members.
The application needs to display a message box to remind the clerk to ask customers to join the Rental Rewards Program when they check out. This message box should only display if the customer is not currently in the program. Which of the following If clauses would evaluate to True and display the message box for the clerk?

A) If strMember "Y" Then
B) If strMember = "Y" Then
C) If strMember = "N" Then
D) a and c

Question 34

The ____ method displays a message box that contains text, one or more buttons, and an icon.

A) MessageBox.Display
B) MessageBox.Group
C) MessageBox.Show
D) MessageBox.Output

Question 35

Which of the following statements assigns the contents of the txtGrade control, in uppercase, to the strGrade variable?

A) If strGrade = txtGrade.Text.ToUpper Then
B) strGrade.ToUpper = txtGrade.Text
C) strGrade = txtGrade.Text.ToUpper
D) txtGrade.Text.ToUpper = strGrade

Question 36

Case-Based Critical Thinking Questions Case 1 - Jack of All Trades
Jack of All Trades rents small power equipment to commercial and residential customers. The strCustomer variable is used to determine whether a customer is commercial (C) or residential (R). Commercial customers receive a 10% discount if they are members of the Rental Rewards Program. Residential customers receive a 5% discount if they are members.
The message provided when a customer is not a current member of the Rental Rewards Program is "Enroll this customer in the Rental Rewards Program?". The clerk must enter a decision before the application can continue. Which of the message box buttons should be used?

A) OK
B) OKCancel
C) YesNo
D) Information

Question 37

With the KeyPress event, use the e parameter's ____ property to cancel the key if it is an inappropriate one.

A) Check
B) KeyEnter
C) KeyChar
D) Handled

Question 38

In the MessageBox.Show( text , caption , buttons , icon [, defaultButton ]) method, which of the following arguments controls the words appearing in the message box?

A) text
B) caption
C) buttons
D) icon

Question 39

Consider the expression 3 * 2 ^ 2 15 - 3. Which operation is performed last?

A) ^
B) -
C) >
D) AndAlso

Question 40

You can use a(n) ____ to visually separate related controls from other controls on the form.

A) radio button
B) check box
C) group box
D) icon area

Question 41

What is a group box and how is it used?

Question 42

Write an If statement that allows only numbers and a decimal place to be accepted.

Question 43

Case-Based Critical Thinking Questions Case 1 - Jack of All Trades
Jack of All Trades rents small power equipment to commercial and residential customers. The strCustomer variable is used to determine whether a customer is commercial (C) or residential (R). Commercial customers receive a 10% discount if they are members of the Rental Rewards Program. Residential customers receive a 5% discount if they are members.
If a customer decides to enroll in the Rental Rewards Program, the Member Information Form displays for the clerk to enter the membership data for the customer. Which of the following statements sends the focus to the txtFirstName control and highlights any text within it?

A) SelectAll(txtFirstName.text)
B) txtFirstName.SelectAll()
C) Focus(txtFirstName.text)
D) txtFirstName.Focus()

Question 44

Your professor wants an application that allows a student to enter two grades and calculate the average of those grades. The application should display the message "Pass" if the average of the grades is 70 or greater. The application should display the message "Fail  if the average of the grades is less than 70. Write the pseudocode for the solution to this problem.

Question 45

Problems - Correcting Code Errors
The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
An application needs to display the message "Please add water" when the amount of water has fallen below the safe limit. Rewrite the following If statement to correct all errors:
If intWaterLimit
lblWarning = "Please add water"
End If

Question 46

Write a statement that changes the contents of the txtStatus control's text property to uppercase and stores it in the strStatus variable.

Question 47

Write an If clause to determine whether the dblTemp variable contains a number that is between 65 and 75.

Question 48

Write an If clause that will determine if the strColor variable contains either the string "red" or the string "blue".

Question 49

Gino's Subs & Pies wants an application that allows a user to enter a customer's order total and address. When a customer purchases $30 or more of food, Gino's offers free delivery. The delivery fee for all other orders is $10. The calculation should display the total amount the customer owes, including any delivery fee. Draw the flowchart for the solution to this problem.

Question 50

Write an If clause to determine whether the user pressed the Backspace key.

Question 51

Problems - Correcting Code Errors
The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
An application needs to display whether or not a student has been accepted to college. The program needs to display either "Accepted" or "Not Accepted". A student must have an SAT score of 1750 or higher and a GPA of 3.3 or higher. Rewrite the following If statement to correct all errors:
If intSAT = 3.3 Then
lblMessage.Text = "Not Accepted"
Else
lblMessage.Text = "Accepted"
End If

Question 52

Write an If...Then...Else statement that displays the string "Balance Due" in the lblMessage control when the decBalance variable contains a number that is greater than 0; otherwise, assign the string "Thank you for your payment."

Question 53

List the three most commonly used icons for display in a message box.

Question 54

What is a selection structure? What is the difference between a single-alternative and dual-alternative selection structure?

Question 55

Write a statement that creates a message box that displays an OK button, an Information icon, "Harris Pharmacy" in the title bar, and the message "Please enter a pickup time for your order".

Question 56

Case-Based Critical Thinking Questions Case 1 - Jack of All Trades
Jack of All Trades rents small power equipment to commercial and residential customers. The strCustomer variable is used to determine whether a customer is commercial (C) or residential (R). Commercial customers receive a 10% discount if they are members of the Rental Rewards Program. Residential customers receive a 5% discount if they are members.
The button selected by the clerk will determine the next task performed by the computer. The application is using the ____ of the MessageBox.Show method.

A) Boolean value
B) return value
C) selection structure
D) function

Question 57

An application needs to calculate a discount for customers who are either preferred customers or senior citizens. Preferred customers have a discount code of  "P". Senior citizens have a discount code of "S". The discount code is stored in the strCode variable. Write an If clause to calculate a discount for all preferred members and senior citizens using the strCode variable.

Question 58

Write an If...Then...Else statement that assigns the number 2000 to the intBonus variable when the decSales variable contains a number that is greater than or equal to $50,000; otherwise, assign the number 500.

Question 59

Complete the chart shown below.