Quiz 4-Sections 3.4 and 3.5-October 8
Section 3.4 Strings
1.
What is the correct syntax for displaying the value of the String variable myString in a text
box?
(A)
(B)
(C)
(D)
2.
Which statement will assign the words “Hello World” to a text box?
(A)
(B)
(C)
(D)
3.
=
=
=
=
Hello & World
"Hello " & World
Hello & " World"
"Hello" & " World"
txtBox.Empty = True
txtBox = ""
txtBox.Text = ""
txtBox.Wipe()
What character is used to signify the beginning of a comment statement?
(A)
(B)
(C)
(D)
5.
txtBox.Text
txtBox.Text
txtBox.Text
txtBox.Text
Which statement can be used to clear the contents of a text box?
(A)
(B)
(C)
(D)
4.
txtBox.Text = "myString"
txtBox.Text = myString
txtBox.Text.myString
txtBox.Text = Str(myString)
asterisk
exclamation mark
apostrophe
backslash
The joining of two strings together to form a new string is called
(A)
(B)
(C)
(D)
concatenation.
addition.
compaction.
substrings.
6.
What will be the output of the following lines?
Dim alphabet, soup As String
alphabet = "abcdefghijklmnopqrstuvwxyz"
soup = alphabet.ToUpper
txtBox.Text = alphabet.Substring(0, 5) & soup.Substring(0, 5)
(A)
(B)
(C)
(D)
7.
abcdeABCDE
ABCDEABCDE
eE
EE
To continue a long statement on another line, use
(A)
(B)
(C)
(D)
an underscore character.
an ampersand character.
Ctrl + Enter.
a space followed by an underscore character.
Section 3.5 Input and Output
1.
Which format statement should be used when you want to output your results in tabular
format with the first column 10 characters wide, the second 5, and the third 10?
(A)
(B)
(C)
(D)
Dim
Dim
Dim
Dim
fmtStr
fmtStr
fmtStr
fmtStr
as
as
as
as
String
String
String
String
=
=
=
=
"{10}{5}{10}"
"{0}{1}{2}"
"{0, 10}{1, 5}{2, 10}"
"{0, 10; 1, 5; 2, 10}"
2.
Which declaration statement is used when you want to read data from the file DATA.TXT?
(A)
(B)
(C)
(D)
3.
Dim
Dim
Dim
Dim
sr As IO.StreamReader = IO.File.OpenText("DATA.TXT")
sr As IO.StreamReader = IO.File.OpenText(DATA.TXT)
DATA.TXT As IO.File.OpenText
IO.File.OpenText("DATA.TXT")
Suppose the first two lines of the file DATA.TXT contain the strings Clint and 1930. What
is displayed by the following lines of code?
Dim name As String, birthYear As Integer
Dim sr As IO.StreamReader = IO.File.OpenText("DATA.TXT")
name = sr.ReadLine
birthYear = CInt(sr.ReadLine)
txtBox.Text = "In 2005, " & name & " will be " & (2005 – birthYear)
sr.Close()
(A)
(B)
(C)
(D)
4.
Clint, 1930
In 2005, Clint will be 2005 – 1930
In 2005, "Clint" will be 75
In 2005, Clint will be 75
What will be displayed when the following lines are executed?
Dim x As Double = 2
Dim y As Double = 3
Dim fmtStr As String = "{0,-5}{1, -5}"
lstOutput.Items.Add("1234567890")
lstOutput.Items.Add(String.Format(fmtStr, x, y))
(A) 1234567890
23
(B) 1234567890
2
3
(C) 1234567890
2
3
(D) 1234567890
2
3
5.
If sr is a StreamReader, then a statement of the form var = sr.ReadLine reads an item of
data from a file and assigns it to the string variable var. (T/F)
6.
Write a statement that assigns the first character of the value of strVar1 to strVar2.