1. Which of the following is true?
(A) "Cat" = "cat"
(B) "Cat" < "cat"
(C) "Cat" > "cat"
(D) Relational operators are only valid for numeric values.
2. Which of the following is a valid VB.NET conditional statement?
(A) 2 < n < 5
(B) 2 < n Or < 5
(C) 2 < n Or 5
(D) (2 < n) Or (n < 5)
3. Which statement is true?
(A) "Ford" < "Ford"
(B) Chevy > Chevy
(C) GMC <= GMC
(D) Oldsmobile < Oldsmobile
4. Which statement is false?
(A) "Ford" >= "Ford"
(B) "Chevy" <= "chevy"
(C) GMC <= GMC
(D) Oldsmobile < Oldsmobile
5. The three main logical operators are ________, _________, and ________.
(A) And, Or, Not
(B) And, Not, If
(C) Or, Not, If
(D) False, And, True
6. When using the logical operator “And”, what part of the expression must be true?
(A) only the left part.
(B) only the right part.
(C) both parts.
(D) either the left or right part, but not both.
7. When using the logical operator “Or”, 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.
8. 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.
9. 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
10. 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
11. Which value for x would make the following condition true: (x >= 5) And (x <= 6)
(A) x is equal to 7
(B) x is equal to 5
(C) x is equal to 5.001
(D) B and C
12. "
13. The following two statements are equivalent. (T/F)
Not (a < b)
a > b
14. In VB.NET, the letter j is considered to be greater than the letter y. (T/F)
15. The And operator requires that both conditions be true for the compound condition to be true. (T/F)
16. The following condition evaluates to true. (T/F)
("DOG" > "CAT") And ("CAT" > "BIRD") And ("BIRD" > "aardvark")
17. Assume that A, B, and C are conditions, with A being true, B being true, and C being false. Give the truth value of each of the following conditions.
(a) A And (Not B)
(b) A And Not (B Or C)
(c) Not (A And B)
18. Is the following condition True or False (assume a = 2, b = 3, and c = 3)?
(a = c) Or (b = c)
19. < and = are examples of relational operators. (T/F)
20. Conditions can involve variables, operators and functions. (T/F)
21. Two stings are compared working from left to right, character by character, to determine which one should precede the other. (T/F)
22. Write a condition to express each of the following:
(a) X is strictly between –10 and 10.
(b) Exactly one of X and Y is greater than 6.
(c) Both X and Y are positive or both X and Y are negative.
1. Consider the following two sets of code.
(a) If (a = 1) And (b = 1) Then (b) If a = 1 Then
txtBox.Text = "Hi" If b = 1 Then
End If txtBox.Text = "Hi"
End If
End If
Which one of the following statements is true?
(A) (a) and (b) will produce different outputs.
(B) (b) is not a valid set of VB.NET instructions.
(C) The two sets of code are equivalent, but (a) is preferred to (b) because (a) is clearer.
(D) The condition statement in (a) is not valid.
2. What will be displayed by the following program when the button is clicked?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim a, b, c, x As Double
a = 5
b = 3
c = 6
If a > c Then
x = 1
Else
If b > c Then
x = 2
Else
x = 3
txtBox.Text = CStr(x)
End If
End If
End Sub
(A) 1
(B) 2
(C) 3
(D) None of the above.
3. Consider the following program.
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim x, y, z As Double
Dim sr As IO.StreamReader = IO.File.OpenText("DATA.TXT")
x = CDbl(sr.ReadLine)
y = CDbl(sr.ReadLine)
z = CDbl(sr.ReadLine)
If ((x > y) Or (x > z)) And (z >= 100) Then
txtBox.Text = "Hello, "
Else
txtBox.Text = "Good-bye, "
End If
sr.Close()
txtBox.Text &= "Larry."
End Sub
Which of the following sets of data in the three lines of the file DATA.TXT will produce the output "Hello, Larry."?
(A) 2, 3, 101
(B) 3, 2, 100
(C) 2, 3, 100
(D) 3, 2, 4
4. 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
z = x + y
Else
z = y - x
End If
txtBox.Text = CStr(z)
End Sub
(A) 6
(B) 3
(C) 0
(D) No output
5. What will be the output of the following program when the button is clicked?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim word1, word2, newword As String
word1 = "shower"
word2 = "about"
newword = word1.Substring(0, 4) & word2.Substring(0, 3)
If newWord.IndexOf("how") = -1 Then
txtBox.Text = "The new word was not found."
Else
txtBox.Text = "Found it."
End If
End Sub
(A) The new word was not found.
(B) Found it.
(C) Syntax error
(D) No output
6. What will be the output of the following program when the button is clicked?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim num As Integer = 10
DisplayMult(num)
num = 5
DisplayMult(num)
num = 2
DisplayMult(num)
End Sub
Sub DisplayMult(num As Integer)
If num <= 3 Then
txtOutput.Text &= CStr(3 * num)
Else
If num > 7 Then
txtOutput.Text &= CStr(7 * num)
End If
End If
End Sub
(A) 7014
(B) 30614
(C) 706
(D) No output
7. What will be the output of the following lines of code?
Dim phrase As String = "A penny saved is worth nothing."
If phrase.IndexOf("pen") <> -1 Then
txtBox.Text = CStr(phrase.IndexOf("pen"))
Else
txtBox.Text = CStr(-1)
End If
(A) pen
(B) 2
(C) 0
(D) A penny saved is worth nothing.
8. Which of the following is not a logical operator in VB.NET?
(A) Not
(B) And
(C) Or
(D) Then
9. What will be displayed when the button is clicked?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim num As Double = 9
txtBox.Text = CStr(CalculateSquareRoot(num))
End Sub
Function CalculateSquareRoot(ByVal NumberArg As Double) As Double
If NumberArg < 0 Then
MsgBox("Error - cannot find square root - result set to zero")
Return 0
Else
Return Math.Sqrt(NumberArg)
End If
End Function
(A) 0
(B) 3
(C) 6
(D) An error will occur.
10. A(n) _____________ allows a program to decide on a course of action based on whether a certain condition is true or false.
(A) Or block
(B) If block
(C) And block
(D) Else block
11. Constructs in which an If block is contained inside another If block are called:
(A) multi-If blocks
(B) nested If blocks
(C) sequential If blocks
(D) none of the above
12. What word(s) will appear in the list box when the button is clicked?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim num As Integer = 5
If num = 2 Then
lstBox.Items.Add("Two")
ElseIf num > 3 Then
lstBox.Items.Add("Great")
ElseIf num = 5 Then
lstBox.Items.Add("Equal")
End If
End Sub
(A) Two, Great, and Equal
(B) Great and Equal
(C) Great
(D) Equal
13. When an If block has completed execution, the program instruction immediately following the If block is executed. (T/F)
14. The following lines of code are correct. (T/F)
If (txtAge.Text >= 62) Then
txtOutput.Text = "You are elegible to collect Social Security."
End If
15. The following lines of code are correct. (T/F)
If age >= 13 And < 20 Then
txtOutput.Text = "You are a teenager."
End If
16. The Else part of an If block may be omitted if no action is associated with it. (T/F)
17. Given that x = 7, y = 2, and z = 4, the following If block will display "TRUE". (T/F)
If (x > y) Or (y > z) Then
txtBox.Text = "TRUE"
End If
18. Given that x = 7, y = 2, and z = 4, the following If block will display "TRUE". (T/F)
If (x > y) And (y > z) Then
txtBox.Text = "TRUE"
End If
19. Every If block must have a Then and an Else. (T/F)
20. No more than one ElseIf statement may occur in any one If block. (T/F)
21. No more than one Else statement may occur in any one If block. (T/F)
22. The following line of code is valid. (T/F)
If letter = ("The quality of mercy is not strained").Substring(7, 1) Then
1. Why is the following Select Case block invalid in VB.NET?
Select Case myName.Substring(0, 1)
Case myName < "D"
txtBox.Text = "Your name starts with A, B, or C."
End Select
(A) There should not be a standard conditional statement 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.
2. Suppose that the selector in a Select Case block is the string variable myvar. Which of the following is NOT a valid Case clause?
(A) Case "
(B) Case "739"
(C) Case (myVar.Substring(0, 1)
(D) Case myVar.Length
3. What will be the output of the following program when the button is clicked?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim name As String =
"
Select Case name
Case "George"
txtBox.Text = "George"
Case "
txtBox.Text = "
Case "
txtBox.Text = "
Case Else
txtBox.Text = "
End Select
End Sub
(A) WashWashington
(B)
(C) WASHINGTONWashington
(D) No output
4. What is the problem (if any) with the following Select Case block which is intended to determine the price of a movie depending on the patron's age?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim age as Integer, price As Double
age = CInt(InputBox("Enter your age:"))
Select Case age
Case Is >= 65 'Senior citizen
price = 4.50
Case Is >= 5 'Regular price
price = 6.00
Case Is >= 0 'Child (no charge with parents)
price = 0
Case Else
txtBox.Text = "Entry error"
End Select
End Sub
(A) Everyone will get in free at the child rate.
(B) The output will always be "Entry error."
(C) The Case Is statements have bad syntax.
(D) There is nothing wrong.
5. What will be the output of the following program when the button is clicked?
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim a, b, c, acronym As String
a = "federal"
b = "aviation"
c = "administration"
acronym = a.Substring(0, 1) & b.Substring(0, 1) & c.Substring(0, 1)
Select Case acronym
Case "FAA"
txtBox.Text = "Federal Aviation Administration"
Case "DEA"
txtBox.Text = "Drug Enforcement Agency"
Case Else
txtBox.Text = "Unknown acronym. Sorry."
End Select
End Sub
(A) Federal Aviation Administration
(B) Drug Enforcement Agency
(C) Syntax error
(D) Unknown acronym. Sorry.
6. 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.
7. What will be displayed in the list box when the following code runs? (Choose two.)
Select 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
lstBox.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) Y will be displayed if the value of num is 12
8. Different items appearing in the same value list of a Select Sase block must be separated by a(n) ____________.
(A) semi colon
(B) comma
(C) colon
(D) pair of quotation marks
9. Which Case clause will be true whenever the value of the selector in a Select Case block is between 1 and 5 or is 8?
(A) Case 1 To 8
(B) Case 1 To 5, 8
(C) Case 1 To 8, 5
(D) Case 1 To 5; 8
10. Which Case clause will be true whenever the value of the selector in a Select Case block is greater than or equal to 7?
(A) Case Is >7
(B) Case Is = 8
(C) Case Is >= 7
(D) Case Is <= 8
11. 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
12. The Case Else part of a Select Case block is optional. (T/F)
13. One may use an If block within a Select Case block. (T/F)
14. One may use a Select Case block within an If block. (T/F)
15. Every Select Case block can be replaced by If blocks. (T/F)
16. One may use a Select Case block within another Select Case block. (T/F)
17. Select Case choices are determined by the value of an expression called a selector.(T/F)
18. Items in the value list must evaluate to a literal of the same type as the selector.(T/F)
19. A single Case statement can contain multiple values.(T/F)
20. You can specify a range of values in a Case clause by using the To keyword. (T/F)