Deck 4: Decisions

Question 1

The operator And is a(n) ____________operator.

A) arithmetic
B) relational
C) logical
D) none of the above

Answer 1

logical

Question 2

Which of the following is true?

A) "Cat" = "cat"
B) "Cat" < "cat"
C) "Cat" > "cat"
D) Relational operators are only valid for numeric values.

Answer 2

B

Question 3

Asc("A") is 65. What is displayed by txtBox.Text = Chr(65) & "BC"?

A) ABC
B) A BC
C) 656667
D) Not enough information is available.

Answer 3

A

Question 4

In Visual Basic, the letter j is considered to be greater than the letter y.

Question 5

Which value for x would make the following condition true: Not (x >= 5)

A) x is equal to 7
B) x is equal to 4
C) x is equal to 5.001
D) All of the above

Question 6

The And operator requires that both conditions be true for the compound condition to be true.

Question 7

The statement txtBox.Text = Chr(162) causes Visual Basic to display the cents symbol (ANSI 162) in the text box, regardless of the font in use.

Question 8

When using the logical operator "Or", what part of the expression must be true?

A) only the left part
B) only the right part
C) either the left or right part, but not both
D) either the left or right part

Question 9

The following two statements are equivalent.
Not (a < b)
a > b

Question 10

The condition "Y" = "y" is true.

Question 11

If two simple conditions are true, the compound condition created from them by the Or operator is also true.

Question 12

Asc("A") is 65. What is Asc("C")?

A) 66
B) 67
C) 68
D) "C"

Question 13

Which statement is false?

A) "Ford" >= "Ford"
B) "Chevy" <= "chevy"
C) "GMC" <= "GMC"
D) "Oldsmobile" < "Oldsmobile"

Question 14

Which value for x would make the following condition true: x >= 5

A) x is equal to 7
B) x is equal to 5
C) x is equal to 5.001
D) All of the above

Question 15

Which of the following is a valid Visual Basic conditional statement?

A) 2 < n < 5
B) 2 < n Or < 5
C) 2 < n Or 5
D) (2 < n) Or (n < 5)

Question 16

Which of the following expressions has as its value the words "Hello World" surrounded by quotation marks?

A) "Hello World"
B) Chr(34) & "Hello World"
C) Chr(34) & Hello World & Chr(34)
D) Chr(34) & "Hello World" & Chr(34)

Question 17

Which statement is true?

A) "Ford" < "Ford"
B) "Chevy" > "Chevy"
C) "GMC" <= "GMC"
D) "oldsmobile" < "Oldsmobile"

Question 18

The three main logical operators are____________ , _____________ , and ____________.

A) And, Or, Not
B) And, Not, If
C) Or, Not, If
D) False, And, True

Question 19

"1st Place" < "2nd Place"

Question 20

When is the expression "Not cond1" true?

A) when cond1 is false
B) when cond1 is true
C) when cond1 is either true or false
D) None of the above

Question 21

The following lines of code are correct.
If age >= 13 And < 20 Then
txtOutput.Text = "You are a teenager."
End If

Question 22

The value of "education".EndsWith("on") is True.

Question 23

Assume that A, B, and C are conditions, with A being true, B being true, and C being false. Give the truth value of (A And Not (B or C)).

Question 24

Given that x = 7, y = 2, and z = 4, the following If block will display "TRUE".
If (x > y) Or (y > z) Then txtBox.Text = "TRUE"
End If

Question 25

Assume that A, B, and C are conditions, with A being true, B being true, and C being false. Give the truth value of (Not (A And B)).

Question 26

Conditions can involve variables, operators, and functions.

Question 27

Given that x = 7, y = 2, and z = 4, the following If block will display "TRUE".

Question 28

Two strings are compared working from left to right, character by character, to determine which one should precede the other.

Question 29

The following condition evaluates to True.
"DOG" > "CAT") And ("CAT" > "BIRD") And ("BIRD" > "aardvark")

Question 30

The value of IsNumeric("$20.00") is True.

Question 31

Assume that A, B, and C are conditions, with A being true, B being true, and C being false. Give the truth value of (A And (Not B)).

Question 32

If two simple conditions are true, the compound condition created from them by the And operator is also true.

Question 33

Is the following condition True or False (assume a = 2, b = 3, and c = 3)? (a = c) Or (b = c)

Question 34

The value of IsNumeric("Twenty") is True.

Question 35

The value of "education".StartsWith("ED") is True.

Question 36

< and = are examples of relational operators.

Question 37

What will be the output of the following program when the button is clicked? Private Sub btnDisplay_Click(...) Handles btnDisplay.Click

Dim $x , y , z$ As Double
$x = 3$
$y = 3$
If $x > y$ Then
$\quad z = x + y$
Else
$\quad z = y - x$
End If
txtBox. Text = CStr $( z )$
End Sub

A) 6
B) 3
C) 0
D) No output

Question 38

What will be displayed by the following program when the button is clicked? Private Sub btnDisplay_Click (...) Handles btnDisplay.Click
Dim $\mathbf { a } , \mathbf { b } , \mathbf { c } , \mathbf { x }$ As Double
$\mathbf { a } = 5$
$\mathbf { b } = 3$
$\mathbf { c } = 6$
If $\mathbf { a } > \mathrm { c }$ Then
$\quad \mathbf { x } = 1$
Else
If $\mathbf { b } > \mathrm { c }$ Then
$\quad \mathbf { x } = 2$
Else
$\quad \mathbf { x } = 3$
$\quad$ txtBox. Text = CStr $( \mathbf { x } )$
End If
End If
End Sub

A) 1
B) 2
C) 3
D) None of the above

Question 39

When an If block has completed execution, the program instruction immediately following the If block is executed.

Question 40

The following lines of code are correct.
If (txtAge.Text >= 62) Then
txtOutput.Text = "You are elegible to collect Social Security."
End If

Question 41

No more than one ElseIf statement may occur in any one If block.

Question 42

No more than one Else statement may occur in any one If block.

Question 43

A variable declared inside an If block ceases to exist after the block is exited.

Question 44

The following line of code is valid.

Question 45

What will be displayed in the list box when the following code runs? SSelect Case num
Case 6, 7, 11
lstBox. Items . Add ("W")
Case Is $< 7$
lstBox. Items . Add ("X")
Case Is > 5
lstBox. Items . Add ("Y")
Case Else
ls tBox. Items . Add ("Z")
End Select

A) Z can never be displayed.
B) W, X and Y will be displayed if the value of num is 6.
C) W and Y will be displayed if the value of num is 7.
D) Z will always be displayed.

Question 46

One may use an If block within a Select Case block.

Question 47

In a Select Case block, if more than one Case clause matches the selector,

A) only the statements associated with the first matching Case clause will be executed.
B) all of the statements associated with each matching Case clause will be executed.
C) only the statements associated with the last matching Case clause will be executed.
D) the program will malfunction and stop.

Question 48

The Case Else part of a Select Case block is optional.

Question 49

A variable declared inside a Select Case block cannot be referred to by code outside of the block.

Question 50

Why is the following Select Case block invalid in Visual Basic? Select Case myName. Substring $( 0,1 )$
Case myName $<$ "D"
$\quad$ txtBox. Text = "Your name starts with A, B, or C."
End Select

A) There should not be a standard conditional expression in a value list.
B) There are not enough Case statements.
C) There is no selector.
D) myName.Substring(0, 1) is not valid where it is.

Question 51

A single Case statement can contain multiple values.

Question 52

The following line of code is valid.
If 0 ? grade ? 100 Then

Question 53

One may use a Select Case block within an If block.

Question 54

Every Select Case block can be replaced by If blocks.

Question 55

Items in the value list must evaluate to a literal of the same type as the selector.

Question 56

Every If block must have a Then and an Else.

Question 57

What type of items are valid for use in the value list of a Case clause?

A) literals
B) variables
C) expressions
D) All of the above

Question 58

You can specify a range of values in a Case clause by using the To keyword.

Question 59

One may use a Select Case block within another Select Case block.

Question 60

Select Case choices are determined by the value of an expression called a selector.

Question 61

Which of the following techniques does NOT always toggle the checked and unchecked state of a check box control?

A) Click on the square or its caption with the mouse.
B) Press the spacebar when the square has the focus.
C) Press Alt+Access key (if an access key has been specified).
D) Set the Checked property equal to 1.

Question 62

A radio button named radButton is placed on a form, and the statement MessageBox.Show(radButton.Checked) is placed in its CheckedChanged event procedure. At run time, what result will be displayed in the message box when the user clicks on radButton?

A) 1
B) True
C) 2
D) False

Question 63

A collection of related radio buttons is usually placed in a_________ .

A) List box
B) Text box
C) Collection Editor
D) Group box

Question 64

Clicking on a checked check box unchecks the check box.

Question 65

What is the key difference between a group of check boxes attached to a group box and a group of radio buttons attached to a group box?

A) Only radio buttons can be toggled.
B) Only one radio button at a time can be checked.
C) Check boxes cannot be attached to a group box.
D) The only difference is the shape of the control.

Question 66

Clicking on a checked radio button unchecks the radio button.

Question 67

Which of the following statements turns on the radio button radButton?

A) radButton = True
B) radButton.On = True
C) radButton.Checked = True
D) radButton.Selected = True

Question 68

Which of the following techniques always toggles the "on" and "off" states of a radio button control?

A) Click on the circle or its caption with the mouse.
B) Press the spacebar when the circle has the focus.
C) Press on another radio button in the same group box.
D) Set the Checked property equal to True.
E) None of the above

Question 69

Which of the following is not commonly used to allow the user to select among several options?

A) a collection of radio buttons
B) a collection of check boxes
C) a list box
D) a collection of text boxes

Question 70

At design time, values can be placed into a list box via the _________.

A) String Editor
B) String Collection Editor
C) Collection Editor
D) Items Editor

Question 71

A check box control named chkFirst contains the following code in its CheckedChanged event procedure. Which of the following is true concerning the use of this control?
Dim message As String = "hello"
MessageBox.Show(message)

A) The message "hello" will appear when the user checks the control but not when it is unchecked.
B) The message "hello" will appear when the user unchecks the control but not when it is checked.
C) The message "hello" will appear when the user checks the control and again when it is unchecked.
D) The message "hello" will not appear using this code.

Question 72

The default event procedure for a list box is _________.

A) SelectedIndexChanged
B) Click
C) CheckedChanged
D) IndexChanged

Question 73

. The value of lstBox.Text is the currently selected item of the list box.

Question 74

Suppose there are four radio button controls attached to a group box control on a form. How many radio buttons can be selected (that is, be "on") at any given time?

A) 2
B) 1
C) 3
D) 4

Question 75

When the user clicks on a check box control at run time, which one of the following events is raised (in addition to the Click event)?

A) ControlAdded
B) Invalidated
C) StyleChanged
D) CheckedChanged

Question 76

The default event procedure for a check box is _________.

A) SelectedIndexChanged
B) Click
C) CheckedChanged
D) Checked

Question 77

When a check box is checked, the value of the Checked property will be

A) True.
B) False.
C) 1.
D) 0.

Question 78

The title (as seen by the user) for the group box control is set by which one of the following properties?

A) Text
B) Name
C) Tag
D) Anchor

Question 79

After several controls of the same type have been created, they can be moved inside a group box and thereby become attached to it.

Question 80

With a check box control, toggling the state of the small square raises the CheckChanged event.