BIS 311 Final Examination Answers
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BIS 311 Final Examination
Answers
Question 1.1. (TCO 1) In the
systems development life cycle, the goal of the design activity is to _____.
(Points : 5)
determine exactly what a new or modified information system should do
create a set of detailed plans or blueprints for the system
build the application
ensure that the application works as desired
Question 2.2. (TCO 2) To plan
the code for a procedure, _____ uses standardized symbols to show the steps the
procedure must follow to reach its goal. (Points : 5)
pseudocode
a TOE chart
a class diagram
a flowchart
Question 3.3. (TCO 3) Computer
memory locations where programmers can temporarily store and change data while
an application is running are _____. (Points : 5)
classes
literals
constants
variables
Question 4.4. (TCO 3) In Visual
Basic, which of the following correctly declares a named constant with the name
strCOURSE that contains the string value “BIS311”? (Points : 5)
Const strCOURSE As String = “BIS311”
String Constant strCOURSE = “BIS311”
Dim strCOURSE As “BIS311”
Const String “BIS311” As strCOURSE
Question 5.5. (TCO 5) A _____
structure is used in an application when a decision needs to be made, followed
by an action derived from that decision. (Points : 5)
selection
sequence
repetition
interrogative
Question 6.6. (TCO 5) If intQty
contains 60, what will be the value of intPrice after executing the following
code?
Select Case intQty
Case 1 To 50
intPrice = 10
Case 51 To 100
intPrice = 8
Case > 100
intPrice = 6
Case Else
intPrice
= 0
End Select (Points : 5)
10
8
6
0
Question 7.7. (TCO 6) The loop
below is classified as a(n) _____ loop.
Dim intNum As Integer = 2
Do
MsgBox( intNum.ToString() )
intNum *= intNum
Loop While intNum < 1000
(Points : 5)
infinite
pretest
posttest
counter-controlled
Question 8.8. (TCO 6) Which
element of the following array contains the value “Red”?
Dim strColors() As String = {“Red”,
“Green”, “Blue”, “Yellow”} (Points : 5)
strColors(4)
strColors(3)
strColors(1)
strColors(0)
Question 9.9. (TCO 7) The _____
of an independent Sub procedure usually begins with the Private keyword.
(Points : 5)
Call statement
argument list
procedure footer
procedure header
Question 10.10. (TCO 7) In the
following function, what should go in the blank in the function header?
Private Function
GetRatio(dblNumerator As Double, dblDenominator As Double) _____
Dim dblRatio As Double
dblRatio = dblNumerator/dblDenominator
Return dblRatio
End Function (Points : 5)
ByVal
ByRef
As Integer
As Double
Question 11.11. (TCO 2) An
application for a shipping company needs to keep track of the length, width,
height, and weight of packages. Using object-oriented programming methods, in
this application, the weight of a package would be represented by a(n) _____.
(Points : 5)
object
attribute
method
class
Question 12.12. (TCO 4) (TCO 4)
Consider the following class definition:
Public Class Box
Public Length As Double
Public Width As Double
Public Height As Double
Public Function GetVolume() As Double
Return Length * Width * Height
End Function
End Class
If crate is an instance of Box,
which of the following statements assigns a value to a property? (Points : 5)
crate.Length = 42
dblVolume = crate.GetVolume()
crate.GetVolume(42)
Call crate.Length(42)
Question 13.13. (TCO 8) A
programmer makes a connection between a Visual Basic application and a database
using the _____. (Points : 5)
Database Integration tool
data box control
Data Source Configuration Wizard
Dataset Designer
Question 14.14. (TCO 9) The
components of a two-tier architecture are _____. (Points : 5)
the primary and the secondary
the client and the server
the master and the subordinate
the alpha and the beta
Page 2
Question 1. 1. (TCOs 1, 2, and
3) You have been asked to develop an application with the following business
requirements: The user will enter an original price. When the user clicks a
Calculate Sale Price button, the application will calculate a sale price by
multiplying the original price by 80%. The application will display the sale
price to the user.
(a) Develop a TOE chart for
this application. You do not need to put it in table form, but list what would
go in the Task column, what would go in the Object column, and what would go in
the Event column for each row of the chart. Your chart should have at least
three rows: one for input, one for processing, and one for output.
(b) Write pseudocode for the
button-click event procedure in this application.
(c) Identify two variables and
one constant that you would declare for this application. For each, provide a
variable or constant name that follows the syntax rules of Visual Basic and the
Hungarian naming convention, and an appropriate Visual Basic data type. (Points
: 30)
Spellchecker
Question 2. 2. (TCO 5) Consider
the following Visual Basic code snippet:
If intScore >= 100 Then
lblMessage.Text = “Great job!”
Else
lblMessage.Text
= “Better luck next time”
End If
(a) What type of control
structure is this? Be as specific as possible, and justify your answer.
(b) Describe step by step how
this code will be executed and what will be displayed to the user for
each of the following values of intScore: 99, 100, and 101.
(c) Rewrite this code snippet
so that it still produces the same results, but changing the condition in the
first line from intScore >= 100 to intScore < 100. (Points : 30)
Spellchecker
(a)
What type of control structure is this? Be as specific as possible, and justify
your answer.
The
control structure is an if statement that returns a message based on the value
of the variable intScore.
(b)
Describe step by step how this code will be executed and what will be displayed
to the user for each of the following values of intScore: 99, 100, and 101.
For 99,
the message displayed on the screen will be “Better luck next time” because 99
is less than 100.
For
100, the message will be “Great job” as the value is included in the scoop on
the variable intScore. i.e. 100 =100 evaluates to true.
For
101, the message will be “Great job” as the value is included in the scoop on
the variable intScore. i.e 101 >100 evaluates to true.
(c)
Rewrite this code snippet so that it still produces the same results, but
changing the condition in the first line from intScore >= 100 to intScore
< 100. (Points : 30)
Question 3. 3. (TCO 6) Consider
the following code snippet:
Dim intTotal As Integer = 0
For intNum As Integer = 1 To 5
intTotal += intNum
Next intNum
MessageBox.Show( intTotal.ToString() )
(a) What type of control
structure is this? Be as specific as possible, and explain your answer.
(b) Identify the counter
variable and the accumulator variable in this loop. Explain your answer.
(c) Describe step by step how
this code will be executed and what value will be displayed in a message box to
the user. (Points : 30)
Spellchecker
(a)
What type of control structure is this? Be as specific as possible, and explain
your answer.
The
control structure is a “for” loop that controls the execution of the condition
and incrementing the intNum variable by 1, until the value 5 is reached.
(b)
Identify the counter variable and the accumulator variable in this loop.
Explain your answer.
The
counter variable is intNum as it is increased by one within the loop and used
to control the loop while the accumulator variable is intTotal because it
stores the incremented value.
(c)
Describe step by step how this code will be executed and what value will be
displayed in a message box to the user. (Points: 30)
The
variable intTotal is initialised to 0, then the counter variable (intNum) is
increased by one at each step until it obtains a value 5, then the loop stops.
The message displayed on the screen will be: 0 1 2 3 4 5.
Question 1. 1. (TCO 7) (a)
Explain the difference between passing by value and passing by reference when
passing variables to a Sub procedure or function.
(b) Describe a specific example
of using a Sub procedure when you would pass a variable by value.
(c) Describe a specific example
of using a Sub procedure when you would pass a variable by reference. (Points :
30)
Spellchecker
(a) Explain the difference between passing
by value and passing by reference when passing variables to a Sub procedure or function.
Passing
by value refers to a method of referencing variables by initialising them to
real values while passing by reference is a reference method that involves
assigning values to functions through other variables.
(b)
Describe a specific example of using a Sub procedure when you would pass a
variable by value.
Function
sum {
Result=12
;}
(c)
Describe a specific example of using a Sub procedure when you would pass a
variable by reference. (Points : 30)
Function
sum {
a=10,
b=12;
Sum=a+b
;}
Question 2. 2. (TCOs 2 and 4)
You have been asked to develop an application to keep track of employees’
scheduled vacations and ensure that all vacations are approved by the manager
and that each employee does not exceed his or her maximum annual vacation time.
Maximum annual vacation time is determined by the number of years the employee
has worked for the firm. You are using object-oriented programming (OOP) to
develop this application.
(a) Describe at least two
classes that you could use in this application and what each class would
represent in the real world.
(b) Describe at least two
properties of each class you identified in part (a) and identify the data type
you would use for each property.
(c) Describe at least one
method of each class you identified in part (a), giving for each the method
name and the action performed by the method. (Points : 30)
Spellchecker
(a)
Describe at least two classes that you could use in this application and what
each class would represent in the real world.
(b)
Describe at least two properties of each class you identified in part (a) and
identify the data type you would use for each property.
(c)
Describe at least one method of each class you identified in part (a), giving
for each the method name and the action performed by the method. (Points : 30)
Question 3. 3. (TCOs 8, 9, and
10) (a) Explain the roles of primary and foreign keys in a relational database.
(b) In a two-tier architecture
with a thin client and fat server, describe the functions performed by the
client and by the server in processing a request by a user for information from
a database.
(c) In a Visual Basic
application that retrieves data from a database, describe the role of a
TableAdapter object. (Points : 30)
Spellchecker
(a) Explain
the roles of primary and foreign keys in a relational database.
(b) In
a two-tier architecture with a thin client and fat server, describe the
functions performed by the client and by the server in processing a request by
a user for information from a database.
.
(c) In
a Visual Basic application that retrieves data from a database, describe the
role of a TableAdapter object. (Points : 30)
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