CSS 331 - Exam II Review: Chapter 5
Do...Loop
A ________ body must contain an instruction that will stop the loop.
when the computer should continue the processing the loop body when the computer should stop processing the loop body.
A looping condition indicates ___________. A loop exit condition indicates ___________.
Accumulator
An _________ is typically updated by incrementing (rather than decrementing) its value by an amount that varies. The amount can be either positive or negative, interger, or non-integer.
overflow error
An ____________ occurs when the value assigned to a memory location is too large for the location's data type.
Initialized and Updated
Counters and Accumulators need to be ______ and _______.
DEFAULT ANSWER
DEFAULT QUESTION On page 219 and 220, there is a chapter 5 summary. It is a THEORY that our instructor also takes exam questions from this. My advice is to STUDY THE CHAPTER SUMMARY as well.
DEFAULT ANSWER
DEFAULT QUESTION On page 224 and 225, Figure 5-46 to answer the questions from 8 to 11.
Ex.: Dim intNum As Integer = 1 Do lblNums.Text = lblNums.Text & intNum.ToString & " " intNum += 1 Loop Until intNum > 5
Do...Loop statement to code a posttest loop. Syntax: Do . loop body instructions to be processed either while the condition is true or until the condition becomes true . Loop {While | Until} Condition
Ex.: Dim intNum As Integer = 1 Do While intNum <= 5 lblNums.Text = lblNums.Text & intNum.ToString & " " intNum += 1
Do...Loop statement to code a pretest loop. Syntax Do {While | Until} Condition . loop body instructions to be processed either while the condition is true or until the condition becomes true . Loop
Ex.: For intNum As Integer = 1 To 5 lblNum.Text = lblNums.Text & intNum.ToString & " " Next intNum displays the numbers from 1 to 5 in the lblNums control
For...Next statement to code a counter-controlled loop. Syntax: For counter [As dataType] = startValue To endValue [Step stepValue] . loop body instructions . Next counter
Four
How many times will the string literal "Hi" appear in the lblMsg control? Dim intCount As Integer Do lblMsg.Text = lblMsg.Text & "Hi" & ControlChars.NewLine intCount += 1 Loop While intCount > 4
Four
How many times will the string literal "Hi" appear in the lblMsg control? Dim intCount As Integer Do While intCount > 4 lblMsg.Text = lblMsg.Text & "Hi" & ControlChars.NewLine intCount += 1 Loop
Three - because only even numbers between 6 and 13
How many times will the string literal "Hi" appear in the lblMsg control? For intCount As Integer - 6 To 13 Step 2 lblMsg.Text = lblMsg.Text & "Hi" & ControlChars.NewLine Next intCount
4, 35, 3, 12, 1
If a list box's Sorted property is set to FALSE, how will the numbers 4, 35, 3, 1, and 12 be displayed in the list box? a. 4, 35, 3, 1, 12 b. 1, 3, 4, 12, 35 c. 1, 12, 3, 35, 4 d. 35, 12, 4, 3, 1
1, 12, 3, 35, 4
If a list box's Sorted property is set to TRUE, how will the numbers 4, 35, 3, 1, and 12 be displayed in the list box? a. 4, 35, 3, 1, 12 b. 1, 3, 4, 12, 35 c. 1, 12, 3, 35, 4 d. 35, 12, 4, 3, 1
For clause
If the counter variable is declared in the ______, it has block scope and can be used only within the For...Next loop.
pre-test; post-test
In a _________ loop, the condition is evaluated before the loop body is processed. in a _________ loop, the condition is evaluated after the loop body is processed.
diamond
In a flowchart, you use the decision symbol ( ______ ) to represent a loop's condition.
14
The computer will stop processing the loop: For intCount As Integer - 6 To 13 Step 2 lblMsg.Text = lblMsg.Text & "Hi" & ControlChars.NewLine Next intCount when the intCount variable contains the number _______.
posttest, pretest
The instructions in a ____________ loop might not be processed at all, where as the instructions in a ____________ loop are always processed at least once. a. posttest, pretest b. pretest, posttest
Items
The items in a list box belong to which collection? a. Items b. List c. ListItems d. Values
post-test
The loop body in a __________ loop will always be processed at least once. depending on the result of the condition, the loop body in a pretest loop may never be processed.
100
The loop controlled by the correct For clause from the review question, (Which of the following For clauses indicates that the loop instructions should be processed as long as the intX variable's value is less than 100?), will end when the intX variable contains the number ________
Ex.: Variables strCity strState intSalary Contents Atlanta GA 42500 Concatenated String: strCity & strState strCity & " " & strState strCity & ", " & strState
To concatenate strings: Use the concatenation operator &
form's AcceptButton
To make the btnCalc control the default button, you need to set the ___________ property. a. btnCalc's AcceptButton b. btnCalc's DefaultButton c. form's AcceptButton d. form's DefaultButton
30
What will be the following code display in the lblSum control? Dim intSum As Integer Dim intY As Integer Do While intY < 3 For intX As Integer = 1 To 4 intSum += intX Next intX intY += 1 Loop lblSum.Text = intSum.ToString
*** ***
What will the following code display in the lvlAsterisks control? For intX As Integer = 1 To 2 For intY As Integer = 1 To 3 lblAsterisks.Text = lvlAsterisks.Text & "*" Next intY lblAsterisks.Text = lvlAsterisks.Text & ControlChars.NewLine Next intX
ascending order
When a list box's Sorted property is set to True, the list box items appear in _______________; otherwise, they appear in the order they are added to the list box.
the For clause's startValue, endValue, and stepValue.
When using the For...Next statement, the number of iterations the loop will perform is controlled by ____________. The _________, __________, and _________ must be numeric and can be positive or negative, integer or non-integer. If you omit the stepValue, a stepValue of positive 1 is used.
SelectedValueChanged
Which event occurs when the user selects a different item in a list box? a. SelectionChanged b. SelectedItemChanged c. SelectedValueChanged d. None of the Above
For intX As Integer = 10 To 99
Which of the following For clauses indicates that the loop instructions should be processed as long as the intX variable's value is less than 100? a. For intX As Integer = 10 To 100 b. For intX As Integer = 10 To 99 c. For intX As Integer = 10 To 101 d. None of the Above
-Financial.Pmt(0.035, 2, 10000)
Which of the following calculates the monthly payment (expressed as a positive number) for a loan of $10,000 for 2 years with a 3.5% annual interest rate? a. -Financial.Pmt(0.035, 2, 10000) b. -Financial.Pmt(0.035 / 12, 2 * 12, 10000) c. -Financial.Pmt(2 * 12, 0.035 / 12, 10000) d. -Financial.Pmt(10000, 0.035 / 12, 2 * 12)
Do Until intPopulation < 5000
Which of the following clauses will stop the loop when the value in the intPopulation variable is less that the number 5000? a. Do While intPopulation >= 5000 b. Do Until intPopulation < 5000 c. Loop While intPopulation >= 5000 d. All of the Above
Add
Which of the following methods is used to add items to a list box? a. Add b. AddList c. Item d. ItemAdd
SelectedIndex
Which of the following properties stores the index of the item selected in a list box? a. Index b. SelectedIndex c. Selection d. SelectionIndex
All of the Above
Which of the following statements can be used to code a loop whose instructions you want processed 10 times? a. Do...Loop b. For...Next c. All of the Above
dblTotal += dblSales
Which of the following statements is equivalent to the statement dblTotal = dblTotal + dblSales? a. dblTotal += dblSales b. dblSales += dblTotal c. dblTotal =+ dblSales d. dblSales =+ dblTotal
lstNames.SelectedItem = 4
Which of the following statements selects the FOURTH item in the lstNames control? a. lstNames.SelectIndex = 3 b. lstNames.SelectIndex = 4 c. lstNames.SelectedIndex = 3 d. lstNames.SelectedItem = 4
Debug, Stop Debugging
You can stop an endless (infinite) loop by clicking _______ and then click Stop Debugging. Or, you can click the ______________ button (the red square) on the Standard toolbar.
String Collection Editor, Items collection's Add method
You can use either the _______________ or the _____________ to add items to a list box.
add a list box to a form
You can use the ListBox tool in the toolbox to __________.
ControlChars.NewLine
You can use the ____________ constant to advance the insertion point to the next line.
repetition; (loop); loop
You use a _________ structure ( ____ ) when you need the computer to repeatedly process one or more program instructions. The _____ condition can be phrased as either a looping condition or a loop exit condition. The condition must evaluate to True or False.
Counter
________ is usually updated by either incrementing or decrementing its value by a constant amount, which can be either positive or negative, integer or non-integer.
Counter, Accumulator
_________ is usually 1 or 0. __________ is usually 0.
Do...Loop statement
a Visual Basic statement that can be used to code both pretest loops and posttest loops
For...Next statement
a Visual Basic statement that is used to code a specific type of pretest loop, called a counter-controlled loop
List box
a controlled used to display a list of items from which the user can select zero items, one item, or multiple items
Collection
a group of individual objects treated as one unit
select zero items, one item, or multiple items
a list box's SelectionMode property determines whether the user can _________.
Posttest loop
a loop whose condition is evaluated AFTER the instructions in its loops body are processed
Pretest loop
a loop whose condition is evaluated BEFORE the instructions in its loop body are processed
Endless loop
a loop whose instructions are processed indefinitely; also called an infinite loop
Counter-controlled loop
a loops whose processing is controlled by a counter; the loop body will be processed a precise number of times
Accumulator
a numeric variable used for accumulating (adding together) something
Counter
a numeric variable used for counting something
CancelButton Property
a property of a form; used to designate the button that can be selected by pressing the "Esc" key
AcceptButton property
a property of a form; used to designate the default button
Multiline Property
a property of a text box; indicates whether the text box can accept and display either one or multiple lines of text
ReadOnly Property
a property of a text box; specifies whether or not the user can change the contents of the text box
ScrollBars Property
a property of a text box; specifies whether the text box has no scroll bars, a horizontal scroll bar, or both horizontal and vertical scroll bars
ControlChars.NewLine constant
advances the insertion point to the next line
Load event
an event associated with form; occurs when the application is started and the form is displayed the first time
Infinite loop
another name for an endless loop
Loop
another name for the repetition structure
SelectedItem Property
can be used to select an item in a list box and also to determine which item is selected; stores the value of the selected item
SelectedIndex Property
can be used to select and item in a list box and also to determine which item is selected; stores the index of the selected item
Decrementing
decreasing value
SelectionMode property
determines the number of items that can be selected in a list box
Incrementing
increasing value
Real numbers
number with a decimal place
Dictionary order
numbers are sorted before letters, and a lowercase letter is sorted before its uppercase equivalent
SelectedIndexChanged event
occurs when an item is selected in a list box
SelectedValueChanged event
occurs when an item is selected in a list box
Overflow error
occurs when the value assigned to a memory location is too large for the location's data type
String Collection Editior
provides an easy way to add items to a list box's Items collection
ControlChars.Tab constant
represents the Tab key
Block scope
scope of the variable declared in a "For...Next" statement's For clause; indicates that the variable can be used only within the "For...Next" loop
Sorted Property
specifies whether the list box items should appear in the order they are entered in the list box or sorted order
Count property
stores an integer that represents the number of items in the Items collection
Clear method
the Items collection's method used to clear (remove) items from a list box
Concatenation Operator
the ampersand (&); used to concatenate strings
Default Button
the button that can be selected by pressing the Enter key even when the button does not have the focus; designated by setting the form's AcceptButton property
Items collection
the collection of items in a list box
&
the concatenation operator in Visual Basic
Repetition structure
the control structure used to repeatedly process one or more program instructions; also called a loop
Default list box item
the item automatically selected in a list box when the application is started and the interface appears
Looping condition
the requirement that must be met for the computer to CONTINUE processing the loop body instructions
Loop exit condition
the requirement that must be met for the computer to STOP processing the loop body instructions
Add method
these Items collection's method used to add an item to a list box
Financial.Pmt method
used to calculate the periodic payment on either a loan or an investment
