Chapter 4

Review Questions

1. Which of the following is a valid condition for an if...Then...Else statement?






state.ToUper( ) = "Alaska" OrElse state.ToUpper( ) =
"Hawaii"






2. Assume you want to compare the string contained in the Text property of
   the firstNameTextBox with the name Bob. Which of the following conditions
   should you use in the If...Then...Else statement?






firstNameTextBox,Text.ToUpper( ) = "BOB"






3. The expression 3 > 6 AndAlso 7 < 4 evaluates to _______.






False






4. The expression 4 > 6 OrElse 10 < 2 * 6 evaluates to _______.






False






5. The expression 7 > = 3 + 4 Or 6 < 4 And 2 < 5 evaluates to _______.






True











If num = 1 Then
nameLabel.Text = "Janet"
ElseIf num = 2 OrElse num = 3 Then
nameLabel.Text = "Paul"
ElseIf num = 4 Then
nameLabel.Text = "Jerry"
Else
nameLabel.Text = "Sue"
End If







6. What will the proceeding code display when the num variable contains the number 2?






Paul






7. What will the proceeding code display when the num variable contains the number 4?






Jerry






8. What will the proceeding code display when the num variable contains the number 6?






Paul






9. What will the proceeding code display when the num variable contains the number 8?






Sue






10. A nested selection structure can appear in _______ of another selection structure






only the false path






11. If the selectorExpression used in the Select Case statement is an integer
    variable named code, which of the following Case clauses is valid?






All of the Above











Select Case num

Case 1
nameLabel.text = "Janet"

Case 2 To 4
nameLabel.Text = "Paul"

Case 5, 7
nameLabel.Text = "Jerry"

Case Else
nameLabel.Text = "Sue"

End Select







12. What will the proceeding Select Case statement display when the num variable contains
    the number 12?






Paul






13. What will the proceeding Select Case statement display when the num variable contains
    the number 3?






Paul






14. What will the proceeding Select Case statement display when the num variable contains
    the number 6?






Jerry






15. Which of the following constants can be used to advance the insertion point to the next
    line in the AnswerLabel?






Advance.NewLine






16. Which of the following methods dteremine whether the cityName variable contains data?






String.IsNullOrEmpty(cityName)






17. If the user clicks the OK button in a message box displayed by the MessageBox.Show method,
    the message box returns the number 1, which is equivalent to which value?






MessageBox.OK






18. Which of the following generates a random integer from 10 to 55,
    inclusive? (The Random object anmed randomGenerator.)






randomGenerator.Next(10,55)






19. Assume the city variable contains the string "Boston" and the state
    variable contains the string "MA" (the city, a comma, a space ad the state) in the
    addressLabel control?






addressLabel.Text = city & ", "state"






20. Assume that a Select Case statement selectorExpression is an Integer
    variable. Which of the following Case clauses tells the computer to process the
    instructions when the Integer varibale contains one of the following numbers:
    1,2,3,4 or 5?






Case 1 To 5