First Exam Review Questions
1. How to clear the pictureboxes, textboxes, and labels?
Solution:
Text1.Text=””
Label1.Caption=””
Picture1.Cls
2. What is the output of the
following Code:
a. Print “AB” & “CD”
b. Print “AB”; ”CD”
c. Print “AB” , “CD”
d. Print “AB” & 1
e. Print “AB” ; 4
f. Print 3 & “AB” & 1
g. Print 3 ; “AB” ; 1
h. Print 3 , “AB” , 1
i. Print 4 ; “AB”
j. Print 1 ; 2
k. Print 1 , 2
3. what is the output of the following code?
right(left(“abcd”,2),1)
len(left(“abcdefgh”,4))
4. what is the result of int(rnd*15)+7? Sol: Displays a random Integer from 7 to 21 (7 and
21 included).
5. what is the result of 5 - Int(Rnd*5)? Sol: Displays a random Integer from 1 to 5 (1 and
5 included).
6. For the following code segment which choice is the more correct?
Private Sub cmdSubmit_Click()
txtPhrase.Font.Name = “Courier New”
End Sub
1. Changes the text box’s font to “Courier New”
2. Changes the command button font to command
3. Changes the textbox text to read “Courier New”
7. What is wrong with the following event procedure?
Private Sub cmd_Click()
txtPhrase.Font.Italic = “Italic”
EndSub
1.
2.
3.
4.
5.
6.
The button has no Name!
No space between End and Sub
“Italic” is an invalid Assignment
nothing
1,2,3
2, 3
8. Determine the output of the following code?
a=2
b=3
c = b^3 + a /2
picDisplay.Print c, C, B
1.
2.
3.
4.
5.
14
c
28
28
14
C
C
0
28
14
27
B
3
3
3
9. Determine the output of the following code?
a=2
b = a*a^2/(4-2)
c = 64/a^3+2
picDisplay.Print b; tab(8); c
1.
2.
3.
4.
5.
4
4
0
10
0
2
10
10
4
0
10. What is the output if we double click the cmdSubmit?
Private Sub cmdSubmit_Click()
a= (2 +3 * 4)/2
picOutput.print “a”, a
EndSub
1. a
2. 7
3. a
a
4. a
10
7
7
7
7
7
11. assume that the file “data.txt” contains:
What is the output of the following code?
12. assume that the file “data.txt” contains:
What is the output of the following code?
13. Determine the output of the following code?
Private Sub Command1_Click()
a=2
a=3
Print a;
b=a*a^2
a=a^a
Print a;
c = 64 / a ^ 3 + 2
Print a
a = 23 - x
Print a
End Sub
14. Determine the output of the following code?
Private Sub Command1_Click()
a=3
Print a - 1;
a=a-1
a=a-1
Print a;
Print a - 1; a + 1; a + 1
Print a
End Sub
15. assume that the files “data1.txt” and “data2.txt” contain:
Determine the output of the following code?
Open "data1.txt" For Input As #1
Open "data2.txt" For Input As #3
Input #3, Num1, Num2
Input #1, Num3, Num4
Print Num1 + Num3
Print Num2 + Num4
Input #1, Num1
Input #3, Num3
Print Num1 + Num3
Close #1
Close #3
16. Determine the output of the following code?
Private Sub Command1_Click()
a=2
a=3
picBox1.Print a;
b=a*a^2
a=a^a
picBox1.Print a;
c = 64 / a ^ 3 + 2
picBox1.Print a
a = 23 - x
picBox1.Print a
picBox1.Cls
End Sub
1. Nothing print
2. 3 27 27
23
3. 23
4. 3 27 27 23
17. When the user clicks a button, _________ is triggered.
a. An event
b) a method c)
a setting
18. What will be the contents of the variable x after the following statement is
executed?
x= Sqr(((9+7)/(4*2))+2)
Ans=2
19. What is the output of the following code?
Private Sub Command1_Click()
Dim s1 As String, s2 As String, s3 As String
s1 = "abcd"
s2 = "hello"
s3 = "CS116Visual Basic.&"
picBox1.Print Mid(s3, 10, 5)
picBox1.Print Mid(s3, 5)
picBox1.Print Len(s2 & s1)
picBox1.Print Mid(Left(s2 & s3 & s1, 10), 5, 6)
picBox1.Print Len(Mid(Left(s2 & s3 & s1, 10), 5, 6))
picBox1.Print Right(s3, Sqr(7 + Int(2.1)))
picBox1.Print Mid(s2 & s3, Len(s1), Len(s1) + 5)
End Sub
20. Determine the output of the following code?
Dim s1 As String, s2 As String, s3 As String
s1 = "abcd"
s2 = "hello"
s3 = "CS116Visual Basic.&"
picBox1.Print InStr(s2, s3)
picBox1.Print InStr(s2, "he")
picBox1.Print InStr(s2, "h e")
picBox1.Print InStr(s2, "ll")
picBox1.Print InStr(s2, "lo")
picBox1.Print InStr(s3, " ")
picBox1.Print InStr(s2, "basic")
picBox1.Print InStr(12, s3, "s") ' start from position 12
End Sub
21. what would be a good name for a text box to hold a persons first name
a) txtFirstName b) txt First Name
c) FirstName d) txt_x
22. The following statements Int(Rnd*19 /2) will generate a number in the
range of _______________?
a) 0 through 19
b)0 through 20
c) 0 through 9
d) 1 through 9
23. Determine the output of the following code?
Private Sub Command1_Click()
picBox1.Print Int(9.2)
picBox1.Print Int(-9.2)
picBox1.Print Int(9.5)
picBox1.Print Int(9.8)
picBox1.Print Int(-9.9)
End Sub
24. what is displayed by txtBox.Text = Chr(65) & “BC”
sol= ABC
25. the visual basic verb that creates a variable is _____?
a) Declare
b) Dim
C) Create
D) none of these
26. Determine the output of the following code?
Private Sub Command1_Click()
picBox1.Print FormatPercent(2 / 3, 4)
picBox1.Print FormatPercent(0.125)
picBox1.Print FormatPercent(0.125, 0)
picBox1.Print FormatNumber(1500600.235)
picBox1.Print FormatNumber(1500600.235, 1)
picBox1.Print Format(600.2, "@@@@@@")
Dim x As Integer, y As Single
x = 10
y = 0.531
s1 = FormatNumber(x, 0)
s2 = FormatPercent(y, 2)
picBox1.Print x; y
picBox1.Print s1; s2
End Sub
27. Determine the output of the following code?
Private Sub Command1_Click()
Dim x As Integer
Dim y As String
Dim z As Single
picBox1.Print
picBox1.Print
picBox1.Print
picBox1.Print
y
x
w
z
End Sub
28. Determine the output of the following code?
Dim str as String
Str=”Irbid-Jordan”
picBox1.Print Left(str,Instr(str,”J”))
Solution= Irbid-J
29. consider the following event procedure
Private Sub cmdTest_Click()
n = txtNum1.Text
m = txtNum2.Text
picBox1.Print “n+m = ”; n + m
End Sub
If the user enters the value 10 in the text box (txtNum1), and 20 in the text box 2
(txtNum2) what will be the output of the above code
Solution: n+m = 1020