Deck 9: Additional Controls and Objects

Question 1

With a simple combo box, the list drops down when the user clicks on the arrow and then disappears after a selection is made.

Answer 1

False

Question 2

Which of the following statements will remove all items from the list box?

A) lstBox.Items.RemoveAll
B) lstBox.Clear
C) lstBox.Items.Clear
D) For i As Integer = 1 to lstBox.Items.Count lstBox.Items.RemoveAt(i) Next

Answer 2

C

Question 3

For a list box named lstBox, the following statement will delete from its list the item whose index is the value num.

Answer 3

True

Question 4

A list that has dropped down disappears when the user clicks on an item or presses the Enter key.

Question 5

The value of cboBox.Items(n) is the nth item in the combo box.

Question 6

Which of the following expressions refers to the contents of the first row of the combo box?

A) cboBox.Items(0)
B) cboBox.Items(1)
C) cboBox.Items.First
D) cboBox.Items(First)

Question 7

In a Simple combo box, the list is always visible.

Question 8

The value of cboBox.Text is the currently highlighted item.

Question 9

If no item in a combo box is selected, the value of lstBox.SelectedIndex is 0.

Question 10

The statement lstBox.Items.RemoveAt(lstBox.SelectedIndex) deletes the item currently highlighted in lstBox.

Question 11

For a list box named lstBox, the following statement will delete the first occurrence of the value of num from its list.

Question 12

The number of items in cboBox is cboBox.Items.Count.

Question 13

Which of the following is the default setting for a combo box's DropDownStyle property?

A) List
B) Simple
C) DropDown
D) DropDownList

Question 14

Which of the following controls does not have a DropDownStyle property that must be specified at design time?

A) ListBox
B) Simple ComboBox
C) DropDown ComboBox
D) DropDownList ComboBox

Question 15

The DropDownStyle property of a combo box must be set at design time.

Question 16

The value of cboBox.Text is the contents of the text box at the top of the combo box.

Question 17

Combo boxes have most of the same properties, events, and methods as list boxes.

Question 18

Which of the following controls has a drop down arrow and an attached text box that allows users to type selections?

A) ListBox
B) Simple ComboBox
C) DropDown ComboBox
D) DropDownList ComboBox

Question 19

Which of the following expressions refers to the contents of the last row of the combo box?
(A)cboBox.Items(lstBox.Items.Count)
B) cboBox.Items(lstBox.Items.Count - 1)
C) cboBox.Items(Count)
(D)cboBox.Items.Count

Question 20

For a scroll bar, the value of the Value property is

A) any number.
B) a number between the values of the SmallChange and LargeChange properties.
C) a number between the values of the Minimum and Maximum properties.
D) true or false.

Question 21

Which of the following controls is NOT used to select an item from a list?

A) List Box
B) ComboBox
C) Timer Control
D) OpenFileDialog

Question 22

With a scroll bar control, the default values of the Minimum and Maximum properties are 1 and 100 respectively.

Question 23

The following statement can be used to assign the Plane.bmp image to the picBox picture box control at runtime.

Question 24

The largest possible value for the Value property in a scroll bar is determined by

A) the LargeChange property.
B) the Minimum property.
C) the Value property.
D) the Maximum property.

Question 25

To move the scroll box of a scroll bar a large distance

A) click on the scroll box.
B) click on the furthermost arrow button.
C) click on the bar between the scroll box and the furthermost arrow.
D) It can only be moved by writing code.

Question 26

In order to begin timing with the timer control, which one of the following must be true?

A) the timer control's Name property must include the prefix tmr
B) the timer control's Interval property must be set to 1
C) the timer control's Enabled property must be set to False
D) the timer control's Enabled property must be set to True

Question 27

When the SizeMode property of a picture box control is set to StretchImage, a picture placed in the control will be resized to fit the picture control.

Question 28

A form contains a horizontal scroll bar control named hsbXpos, and the statement lblFace.Top = hsbXpos.Value is placed inside the hsbXpos.Scroll event procedure (where lblFace identifies a label on the form, and the hsbXpos's Minimum and Maximum properties are set at their default values). What will happen when the hsbXpos.Scroll event is triggered by moving the scroll bar's scroll box to the right?

A) lblFace will move to the left
B) lblFace will move up
C) lblFace will move down
D) lblFace will move to the right

Question 29

For a timer control named Timer1, the Timer1.Enabled event is triggered each time Timer1.Interval milliseconds elapses.

Question 30

The timer control is invisible during run time.

Question 31

The distance that the scroll box of a scroll bar will move when an arrow on the scroll bar is clicked is determined by

A) LargeChange.
B) SmallChange.
C) Value.
D) Maximum.

Question 32

The correct code for replacing the selected text in txtBox with the contents of the Clipboard is:

A) txtBox.SelectedText = Clipboard.Text
B) txtBox.SelectedText = Clipboard.SetText
C) txtBox.SelectedText = Clipboard
D) txtBox.SelectedText = Clipboard.GetText

Question 33

Which of the following steps turns off a timer control?

A) Set the Interval property to zero.
B) Set the Enabled property to False.
C) Make the timer control invisible.
D) None of the above

Question 34

The SizeMode property of a picture box control cannot be altered at run time.

Question 35

MenuStrip controls respond to which one of the following events?

A) Change
B) Click
C) Double
D) Load

Question 36

The main properties of a scroll bar are set in millimeters.

Question 37

The Clipboard object is used for all of the following except which one?

A) Copy text to the Clipboard.
B) Paste text from the Clipboard.
C) Clear the screen.
D) Clear the Clipboard.

Question 38

Which of the following methods is used to load a new picture into a picture box control?

A) picBox.Picture = filespec
B) picBox.Image = filespec
C) picBox.Image = Image.FromFile(filespec)
D) picBox.Picture = LoadPicture(filespec)

Question 39

Which of the following settings of a timer's Interval property will raise a timer event every 5 seconds?

A) 5
B) 5000
C) 5 seconds
D) 5000 milliseconds

Question 40

The size of a picture assigned to a picture box control is limited by the original size of the picture.

Question 41

The term modal refers to

A) the user not being allowed to shift the focus to any other form until the displayed modal form is hidden.
B) the BorderStyle property is set to "3-Fixed Double."
C) the ability to reposition a form at run time.
D) the ability to display more than one form at one time.

Question 42

The__________ event occurs just before a form closes.

A) FormClosing
B) Closing
C) CloseForm
D) FormEnding

Question 43

When working with the MenuStrip control, the programmer makes the menus useful by placing code in the relevant Click event procedure for each menu item.

Question 44

The__________ control is used to print a form.

A) PrintDocument
B) FormPrinter
C) Print
D) PrintForm

Question 45

The statement Clipboard.SetText(str) replaces the current contents of the Clipboard with the value of str.

Question 46

Namespace-level variables are declared with the keyword __________.

A) Dim
B) Private
C) Public
D) Global

Question 47

After a ToolTip control has been placed into the component tray of the Form Designer, the setting of what property determines how long a tooltip will remain visible when the mouse hovers over a text box?

A) AutomaticDelay
B) AutoPopDelay
C) Duration
D) AutoDelay

Question 48

After a ToolTip control has been placed into the component tray of the Form Designer, the setting of what property determines the amount of time required for a tooltip to appear when mouse hovers over a text box?

A) AutomaticDelay
B) AutoPopDelay
C) Duration
D) AutoDelay

Question 49

When working with the MenuStrip control, the programmer is not allowed to set up access keys by placing an ampersand in front of a character of text.

Question 50

Menus are designed with the MenuStrip control invoked from the Toolbox.

Question 51

Given that the ANSI value for the letter A is 65, the pair of statements below will always display one of A, B, or C.

Question 52

A form contains a button called btnDisplay, and the following code is placed inside btnDisplay's Click event procedure. At run time, which one of the following cannot possibly be displayed in the message box when the user clicks on btnDisplay? Dim rndNum As New Random Dim num1 As Integer num1 = rndNum.Next(0, 3) MessageBox.Show(CStr(num1))

A) 3
B) 2
C) 1
D) 0

Question 53

A random number generator object can be declared with the following statement.

Question 54

A form contains a button called btnDisplay, and the following code is placed inside btnDisplay's Click event procedure. At run time, identical values will be displayed for num1 and num2 in the message box.
Dim num1, num2 As Integer
num1 $= \operatorname { rndNum } \cdot \operatorname { Next } ( 0,3 )$
num2 $=$ rndNum. Next $( 0,3 )$
MessageBox. Show (nam1 & " " & num2)

Question 55

The output of the following lines of code will be a randomly selected whole number from 1 through 6, inclusive. Dim rndNum As New Random num1 = rndNum.Next(1, 7) MessageBox.Show(num1)
Dim rndNum As New Random()
num1 $=$ rndNum. $\operatorname { Next } ( 1,7 )$
MessageBox. Show (num1)

Question 56

The Clipboard object is used to move or copy information from one location to another, including from one Windows application to another.

Question 57

Pressing Ctrl+V with the cursor in a text box inserts the contents of the Clipboard at the cursor position.

Question 58

A form contains a text box named txtBox and a button named btnClip. The statement Clipboard.SetText(txtBox.Text) is placed inside btnClip's Click event procedure. At run time, what will be placed into the Clipboard if the user enters the word "Hello" into txtBox and then clicks on btnClip?

A) the word "txtBox"
B) the word "Hello"
C) the Clipboard will be emptied of all contents
D) the word "btnClip"

Question 59

After a ToolTip control has been placed into the component tray of the Form Designer, the message that appears when the mouse hovers over a text box is set with which of the following properties?

A) ToolTip
B) Message
C) ToolTip on ToolTip1
D) ToolTipMessage

Question 60

A form contains a text box named txtBox and a button named btnClip. The statement Clipboard.SetText("") is placed inside btnClip's Click event procedure. At run time, what will be placed into the Clipboard if the user enters the word "Hello" into txtBox and then clicks on btnClip?

A) the word "txtBox"
B) the word "Hello"
C) the Clipboard will be emptied of all contents
D) the word "btnClip"

Question 61

Give a statement that draws a red diagonal from the upper-left corner of the picture box to the lower-right corner.

A) gr.DrawLine(Color.Red, 0, 0, picOutput.Width, picOutput.Height)
B) gr.DrawLine(Pens.Red, 0, 0, picOutput.Height, picOutput.Width)
C) gr.DrawLine(Pens.Red, 0, 0, picOutput.Width, picOutput.Height)
D) gr.DrawLine(Pens.Red, picOutput.Width, 0, 0, picOutput.Height)

Question 62

Give a statement that draws a blue line from the upper-left corner of the picture box to the center of the picture box.

A) gr.DrawLine(Pens.Blue, 0, 0, picOutput.Width/2, picOutput.Height/2)
B) gr.DrawLine(Pens.Blue, picOutput.Height, picOutput.Width, 0, 0)
C) gr.DrawLine(Pens.Blue, 0, 0, picOutput.Height/2, picOutput.Width/2)
D) gr.DrawLine(Pens.Blue, picOutput.Width/2, 0, 0, picOutput.Height/2)

Question 63

Forms only can be closed with statements of the form Me.Close.

Question 64

The radius of the circle drawn by the statement gr.DrawEllipse(Brushes.Red, 10, 20, 40, 40) is

A) 10 pixels.
B) 20 pixels.
C) 40 pixels.
D) 80 pixels.

Question 65

The center of the circle drawn by the statement gr.DrawEllipse(Brushes.Red, 10, 20, 40, 40) has coordinates

A) (30, 40).
B) (10, 20).
C) (20, 40).
D) (40, 40).

Question 66

The statement gr.FillRectangle(Brushes.Red, 10, 20, 30, 40) draws a solid rectangle of width 40 pixels.

Question 67

The_________ is used to specify the startup form for a program.

A) Toolbox
B) Properties window
C) Project Designer
D) Toolbar

Question 68

The statements gr.DrawLine(Pens.Red, 10, 20, 30, 40) and gr.DrawLine(Pens.Red, 30, 40, 10, 20) draw the same line.

Question 69

A program contains two forms with the names Form1 and Form2. Form1 contains a button called btnDisplay, and the following code is placed inside btnDisplay's Click event procedure.
Form2.ShowDialog
MessageBox.Show("Hello")
Which of the following statements is true after the user clicks on btnDisplay at run time?

A) Form2 appears behind Form1 and the user will be able to set the focus to either form.
B) Form2 appears in front of Form1 and the user will only be able to set the focus to Form2.
C) A message box displaying the text "Hello" appears in front of Form2 and Form1.
D) A message box displaying the text "Hello" appears behind Form2 and Form1.

Question 70

What is the effect of the statement gr.DrawString("Hello", Me.Font, Brushes.Blue, 50, 60)?

A) Display the word Hello in blue.
B) Display the word Hello beginning 50 pixels from the left side of the picture box.
C) Display the word Hello with the top of the word 60 pixels from the top of the picture box.
D) All of the above

Question 71

The statements gr.DrawLine(Pens.Red, 0, 0, 30, 40) and gr.DrawLine(Pens.Red, 10, 20, 40, 60) draw lines of the same length.

Question 72

The statements gr.DrawLine(Pens.Red, 0, 0, 30, 40) and gr.DrawLine(Pens.Red, 0, 0, 40, 30) draw lines of the same length.

Question 73

A modal form cannot lose the focus until the form disappears.

Question 74

The__________ method is used to display a form as a modal form and give it the focus.

A) ShowForm
B) ShowDialog
C) ShowModal
D) ShowModalForm

Question 75

Give a statement that displays the value of the string variable strVar with yellow letters.

A) gr.DrawString(strVar, Me.Font, Yellow, 50, 50)
B) gr.DrawString(strVar, Me.Font, Brushes.Yellow, 50, 60)
C) gr.DrawString(strVar, Me.Font, Pens.Yellow, 50, 60)
D) gr.DrawString(strVar, Me.Font, Color.Yellow, 50, 60)

Question 76

When working with multiple forms, only one form can be visible at the same time.

Question 77

A class-level variable declared in one form can be accessed by other forms if it is declared with the keyword Public.

Question 78

The distance from the top of the picture box to the top of the circle drawn by the statement gr.DrawEllipse(Brushes.Red, 10, 20, 40, 40) is

A) 10 pixels.
B) 20 pixels.
C) 40 pixels.
D) 80 pixels.

Question 79

Code in one form can refer to controls in another form.

Question 80

The first form loaded when a program starts running is called the _ form.

A) default
B) startup
C) initial
D) favored