Question 1

The term modal refers to

Accepted Answer

The term modal refers to a type of form that prevents the user from interacting with any other form in the application until the modal form is closed. This means that the focus cannot be shifted to any other form until the displayed modal form is hidden.

Question 2

The__________ event occurs just before a form closes.

Accepted Answer

The FormClosing event occurs just before a form is closing, allowing you to perform any necessary tasks before the form is closed.

Question 3

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.

Accepted Answer

When a user clicks on a menu item in the MenuStrip control, the relevant Click event procedure is triggered. By placing code in this event procedure, the programmer can make the menus useful and responsive to user interaction.

Question 4

The__________ control is used to print a form.

Accepted Answer

The PrintForm control is specifically designed to print a form in a Windows Forms application, capturing the current visual representation of the form and sending it to the printer.

Question 5

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

Accepted Answer

The statement Clipboard.SetText(str) sets the value of str as the current contents of the Clipboard, replacing any previous content.

Question 6

Namespace-level variables are declared with the keyword __________.

Accepted Answer

Namespace-level variables should be declared as Public, so that they are accessible from any code within the namespace. The keyword 'Dim' is used to declare variables within a specific procedure or function, while 'Private' is used to declare variables that are only accessible within the class/module they are declared in. 'Global' is not a keyword in VB.NET.

Question 7

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?

Accepted Answer

The AutoPopDelay property determines how long the tooltip will remain visible after it appears. The AutomaticDelay property determines how long it takes for the tooltip to appear after the mouse hovers over the text box. Duration is not a valid property for a tooltip control, and AutoDelay is not a property at all.

Question 8

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?

Accepted Answer

AutomaticDelay property determines the initial delay before the ToolTip appears.

Question 9

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.

Accepted Answer

When working with the MenuStrip control, the programmer is allowed to set up access keys by placing an ampersand in front of a character of text.

Question 10

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

Accepted Answer

Menus are designed using the MenuStrip control in the Toolbox in Visual Studio.

Question 11

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.

Accepted Answer

If we take the remainder of 65 divided by 3, we get 2. Therefore, adding 0, 1, or 2 to 65 and converting the resulting ANSI value to a character will always give us A, B, or C, respectively.

Question 12

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))

Accepted Answer

The Random.Next(0, 3) method generates a random number that is greater than or equal to 0 and less than 3. Therefore, it can never generate the number 3.

Question 13

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

Accepted Answer

A random number generator object can be declared using various programming languages such as Python and Java.

Question 14

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)

Accepted Answer

The provided code snippet contains several syntax errors and inconsistencies that would prevent it from compiling or running as intended. For example, "rndNum" is not defined or instantiated as a Random object, and the method to generate a random number is incorrectly written. Additionally, there's a typo in the MessageBox.Show line ("nam1" should be "num1").

Question 15

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)

Accepted Answer

The code creates a new instance of the Random class called "rndNum" and generates a random integer between 1 (inclusive) and 7 (exclusive) using the Next method. The resulting value is then assigned to the variable "num1" and displayed in a message box. Since the range includes 1 and 6, the possible integer values that can be displayed are 1, 2, 3, 4, 5, and 6.

Question 16

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

Accepted Answer

The Clipboard object is commonly used in programming to allow the user to copy and paste information from one location to another, such as from one application to another, or even within the same application. This can greatly improve user productivity and efficiency.

Question 17

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

Accepted Answer

Pressing Ctrl+V in a text box will insert whatever is currently stored in the Clipboard at the current cursor position.

Question 18

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?

Accepted Answer

The statement Clipboard.SetText(txtBox.Text) sets the text in the Clipboard to whatever is currently in the txtBox, which in this case is "Hello". Therefore, the word "Hello" will be placed in the Clipboard.

Question 19

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?

Accepted Answer

The message that appears when the mouse hovers over a text box, after a ToolTip control has been placed in the component tray, is set with the property named similarly to "ToolTip on ToolTip1". This property links the ToolTip control to a specific control on the form, allowing you to set a hover message for that control.

Question 20

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?

Accepted Answer

The statement Clipboard.SetText("") specifically sets the Clipboard's content to an empty string, effectively clearing it, regardless of what was previously entered in the txtBox.

Quiz 9: Additional Controls and Objects