Question 1

Which of the following code segments assigns the string "Great Year" to the Text property of a label named lblMessage when the value in the variable decSales is either greater than 50,000 or equal to 50,000?

Accepted Answer

The code segment checks if the value in decSales is greater than or equal to 50,000 using the >= operator. If it is, it sets the Text property of lblMessage to "Great Year". Option A checks for values greater than 50,000 only, Option C checks for values less than 50,000, and Option D has a syntax error as there should not be a space between < and = in the condition.

Question 2

What value will be assigned to intIndex when the following statements execute? Dim strTarget As String = "asdsakfljfdgasldfjdl"
Dim intIndex = strTarget.IndexOf"as", 1, 10)

Accepted Answer

D

Question 3

Which statement assigns the string strAddress to label lblAddress while removing only trailing spaces?

Accepted Answer

The TrimEnd() function will remove only the trailing spaces from the string, and then it can be assigned to the label's text property using the Text property.

Question 4

Which function accepts a string as its argument and returns True if the string contains only numeric digits?

Accepted Answer

The IsNumeric function accepts a string as its argument and returns True if the string contains only numeric digits. Option A (IsNumber) does not exist as a VBA function. Option C (CStr) and Option D (ToString) are used for converting data types and do not verify if a string contains only numeric characters.

Question 5

Because only one radio button in a group can be selected at any given time, they are said to be ____.

Accepted Answer

Radio buttons are mutually exclusive because only one can be selected at a time, and selecting one deselects all others in the same group.

Question 6

Suppose you want to determine whether a variable, decPayAmount, is between 1200 and 1400, inclusively. If it is, you want to set lblMessage text to "Pay amount is in the range". Which of the following code segments will accomplish this?

Accepted Answer

The correct code checks if decPayAmount is greater than or equal to 1200 AND less than or equal to 1400. This can be achieved with the condition "decPayAmount >=1200 And decPayAmount <=1400". Option A has the conditions in the wrong order and uses "And" instead of "Or". Option B uses "Or" instead of "And". Option D has the conditions in the wrong order and uses "Or" instead of "And".

Question 7

What value will be assigned to intIndex when the following statements execute? Dim strTarget As String = "asdsakfljfdgasldfjdl"
Dim intIndex = strTarget.IndexOf"as", 1)

Accepted Answer

The `IndexOf` method in the given code searches for the substring "as" starting from index 1 in the string "asdsakfljfdgasldfjdl". The first occurrence of "as" after index 0 is at index 12, hence the value assigned to `intIndex` is 12.

Question 8

The first character in a string has an index of .

Accepted Answer

In most programming languages, indexing starts from 0, so the first character in a string is assigned an index of 0.

Question 9

What value is assigned to the variable strSnip when the following statements execute? Dim strSnip As String
Dim strFullString As String = "Washington"
StrSnip = strFullString.Substring1, 3)

Accepted Answer

The Substring method in VB.NET starts at a specified character position and continues for a specified number of characters. Here, it starts at position 1 (0-based indexing, so the second character) and extracts 3 characters, resulting in "ash" from "Washington".

Question 10

What value is assigned to decTaxes by the following program segment, assuming that the user enters 50000 into the textbox txtSalary.Text? Dim decSalary, decTaxes As Decimal
DecSalary = CDec txtSalary.Text)
If decSalary > 50000) Then
DecTaxes = .40 * decSalary
ElseIf decSalary > 40000) Then
DecTaxes = .30 * decSalary
ElseIf decSalary > 30000) Then
DecTaxes = .20 * decSalary
Else
DecTaxes = .10 * decSalary
End If

Accepted Answer

The answer of What value is assigned to decTaxes by...

Question 11

What value is assigned to decTaxes by the following program segment, assuming that the user enters 30000 into the textbox txtSalary.Text? Dim decSalary, decTaxes As Decimal
DecSalary = CDectxtSalary.Text)
If decSalary > 50000) Then
DecTaxes = .40 * decSalary
ElseIf sngSalary > 40000) Then
DecTaxes = .30 * decSalary
ElseIf sngSalary > 30000) Then
DecTaxes = .20 * decSalary
Else
DecTaxes = .10 * decSalary
End If

Accepted Answer

Since the salary entered is 30000, it does not meet any of the conditions for higher tax brackets and falls into the "Else" category, which assigns decTaxes as .10 * decSalary, resulting in 3000.

Question 12

Visual Basic uses values to represent characters such as A, B, and C in memory.

Accepted Answer

The answer of Visual Basic uses values to represent characters...

Question 13

Suppose you want to verify that the user has entered a value into a text box named txtInput. Which of the following code segments responds with an appropriate message if the user does not enter a value?

Accepted Answer

Option D uses the correct syntax to check if txtInput.Text is empty and displays an appropriate message. Option A is close, but the not-equal sign should be <>, not < >. Option B checks for a space character instead of an empty string. Option C is also close, but the not-equal sign should be <>, not < > and it uses the class String instead of string.Empty.

Question 14

What value is assigned to the variable strSnip when the following statements execute? Dim strSnip As String
Dim strFullString As String = "Washington"
StrSnip = strFullString.Substring7)

Accepted Answer

The Substring() method returns a substring of the specified length starting from the specified position in the source string. In this case, we start at position 7 (which is the letter "t" in "Washington") and the length is not specified, which means it will keep going until the end of the string. Therefore, the value of strSnip will be "ton".

Question 15

If the Boolean expression A is True and B is False, the value of the logical expression A Or B is .

Accepted Answer

In a logical OR operation, the result is True if at least one of the operands is True. Since A is True, A Or B evaluates to True.

Question 16

What value will be assigned to intIndex when the following statements execute? Dim strTarget As String = "asdsakfljfdgasldfjdl"
Dim intIndex as Integer = strTarget.IndexOf"GAS")

Accepted Answer

Since "GAS" is not found in the string "strTarget", the value assigned to intIndex will be -1.

Question 17

A flag is a _variable that signals when some condition exists in the program.

Accepted Answer

A flag variable is typically a Boolean variable that can have two states - true or false - and is used to signal when some condition exists in the program. This allows the program to perform different actions based on the value of the flag. Local and class-level variables are not necessarily flags, and standard variables do not inherently have the functionality of a flag.

Question 18

If the Boolean expression A is True and B is False, the value of the logical expression A And B is .

Accepted Answer

The logical operator "And" requires both operands to be True in order for the result to be True. Since B is False, the result of A And B is False.

Question 19

To convert a copy of a string to all uppercase letters, use the method of the String object.

Accepted Answer

The correct method of the String object to convert a copy of a string to all uppercase letters is ToUpper. This method returns a new string in which all the characters are converted to uppercase.

Question 20

The _keyword is required to use relational operators in a Case statement.

Accepted Answer

The "Is" keyword is required to use relational operators in a Case statement in programming languages like Visual Basic. It allows for comparisons beyond simple equality.

Quiz 4: Making Decisions