BIS 311 Final Exam Solution

BIS 311 Final Exam Solution

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BIS 311 Final Exam Solution

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)

ConststrCOURSE 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)

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

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)

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)

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)

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)

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)

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)