NATIONAL CERTIFICATE (VOCATIONAL) PRINCIPLES OF COMPUTER PROGRAMMING (Second Paper: Practical) NQF LEVEL 3 NOVEMBER 2009

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LEVEL 3 NOVEMBER 2009 (10041023) 27 November

1 NATIONAL CERTIFICATE (VOCATIONAL) PRINCIPLES OF COMPUTER PROGRAMMING (Second Paper: Practical) NQF LEVEL 3 NOVEMBER 2009 ( ) 27 November (X-Paper) 09:00 13:00 This question paper consists of 15 pages.

2 ( ) -2- NC1900(E)(N27)V TIME: 4 HOURS MARKS: 150 INSTRUCTIONS AND INFORMATION Answer ALL the questions. Read ALL the questions carefully. 3. Number the answers according to the numbering system used in this question paper. INSTRUCTIONS TO CANDIDATES AND LECTURERS Candidates must be seated in the computer laboratory 30 minutes before the start of the examination to ensure that all computers have the appropriate programs. The questions in this question paper will be done on the computer by making use of a database program (MSAccess) and VB.Net 2005 or VB.Net 2005 Express. Candidates must make sure that they print their work immediately after they have completed a question. Ensure that your examination number is printed on each printout. NO QUESTION WITHOUT A PRINTED EXAMINATION NUMBER WILL BE MARKED. In the event of a power failure or a computer or printer breakdown, the invigilator will make the necessary arrangements for students to continue and the actual time lost will be given to them once they resume working. All work on the computer should be saved at regular intervals to prevent loss of work in the event of a power failure. NO additional time may be allowed for such lost work. No candidate may print his/her work for another candidate, or make a memory stick available to another or access other candidates' work on the network. Any attempt to access information from or transfer information to another candidate in whatever manner is a contravention of the examination rules and regulations and will be viewed in an extremely serious light.

3 ( ) -3- NC1900(E)(N27)V All printouts or screen prints done during the session MUST be handed in. Make sure that your examination number appears on all pages. Students may NOT copy the source code of VB.Net to MSWord and then print it from the word processor. Steps to make a SCREEN DUMP: 10.1 Run the solution Hold in the ALT key and press PRINT SCREEN (This will copy the active screen) Open the MSWord program in Windows and PASTE the screen Add your examination number to the top right-hand side of your screen Print from here You are allowed to make use of the Help files on VB.NET. The following files will appear on your hard drive: 12.1 C:\NOV 2009 PRACTICAL\CLASS LIST\ 12.2 C:\NOV 2009 PRACTICAL\ICECREAM\ 12.3 C:\NOV 2009 PRACTICAL\

$Open the solution CLASS LIST (C:\NOV 2009 PRACTICAL\CLASS LIST) on the hard disk and complete this question by following the instructions below.$

4 ( ) -4- NC1900(E)(N27)V QUESTION 1: PROGRAMMING VB.NET The following question refers to a VB.Net solution that has been saved on your hard drive. Open the solution CLASS LIST (C:\NOV 2009 PRACTICAL\CLASS LIST) on the hard disk and complete this question by following the instructions below. You are part of a team who works for a company that designs school administration packages. Your job is to add the code to the user interface. Buttons GroupBox Labels ListBox TextBoxes The above list was used to name the controls on the user interface screen. Use this as a reference to complete the program code.

(10041023) -5- NC1900(E)(N27)V WORKING OF THE PROGRAM EXPLAINED Step 1: Step 2: Step 3: Step 4: Step 5: Step 6: Step 7: Step 8: Amount of students is entered into the Amount Students TextBox, Enter

5 ( ) -5- NC1900(E)(N27)V WORKING OF THE PROGRAM EXPLAINED Step 1: Step 2: Step 3: Step 4: Step 5: Step 6: Step 7: Step 8: Amount of students is entered into the Amount Students TextBox, Enter Amount button is clicked and then the Student Detail, GroupBox, with the Student Detail will be enabled. The Student Name and Student Surname are keyed in; the process will use a loop to count how many entries have been made by the user. Click Enter Student button. Key in the next student. When the last student's name is keyed in, the MessagesBox appears. Names and Class of students are written into the ListBox on the right-hand side of the form. Fields are cleared when Clear button is clicked. Program exits when Exit button is clicked. GENERAL HINT: The program should make use of TWO counters.

6 ( ) -6- NC1900(E)(N27)V 1.1 Add your examination number to LABEL 4 on the form and as a comment in your code. HINT: Use the following data in your program. There are FIVE students. Name Surname Jabu Nkosi Busi Mabena Eden Zulu Ernest Botha Suzi Quatro (1) 1.2 Declare the variables and the array. (3) 1.3 The program has to store the NAMES and SURNAMES of the students in an array called AmountArray() of the type string. (3) 1.4 The GroupBox must be enabled when the amount has been keyed in into the txtamount TextBox. (1) 1.5 When the user clicks Enter Amount, the TextBox for the amount has to be cleared. (1) 1.6 Redimension the array to the new size of the amount of students. (1) 1.7 Make use of a counter variable. (2) 1.8 The program has to test if the user keyed in an amount bigger than zero (0). (2) 1.9 When the user clicks the Enter Student button, the Name and Surname have to be entered into the array. (3) 1.10 The TextBox for Name and Surname has to be cleared when the user clicks the Enter Student button. (1) 1.11 Move the focus back to the txtname TextBox. (1) 1.12 When the user has entered the final name, a MessageBox has to appear, saying Limit Reached. (2) 1.13 The names and surnames of the students have to be written to the ListBox from the array using a For - Next loop. (4) 1.14 There should be a space between the Name and the Surname when they are displayed in the ListBox. (1)

7 ( ) -7- NC1900(E)(N27)V 1.15 The names of the students have to be sorted in alphabetical order. Use the ListBox sort method. (2) 1.16 The Clear button has to clear all TextBoxes. Make use of a Procedure. (3) 1.17 The Exit button has to close the program. (1) 1.18 Add descriptive comments to each subprocedure. (4) 1.19 Make a screen dump of the completed form. Make sure that your examination number appears on the form as specified in QUESTION 1.1. (2) 1.20 Print the source code. (2) [40] QUESTION 2: DEBUGGING PROGRAM INSTRUCTIONS You are working as a junior programmer in a company that writes programs for small enterprises. The current project is in its final phase and is handed over to you to complete. Open the solution C:\NOV 2009 PRACTICAL\ICECREAM) on the hard drive. This program calculates and displays incorrect results. It is your job to find these errors in the program. Use the test data below to test the program. The last column shows the output that is expected. TEST DATA Ice-Cream Sales Cold Drink Sales Correct Output 20 3 R R R R80.50

8 ( ) -8- NC1900(E)(N27)V 2.1 Change the original code so that the output would be the same as in the CORRECT OUTPUT column in the table above. Below is the code from the hard disk. Public Class frmicecream ' Replace this COMMENT with your EXAMNUMBER Private Sub btnenterdata_click(byval sender As System.Object, ByVal e As System.EventArgs) Handles btnenterdata.click ' This program Calculates the Average Dim Icecream As Single Dim Colddrinks As Single Dim Average As Integer Icecream = txticecream.text Colddrinks = txtcolddrinks.text Average = Icecream + Colddrinks / 2 lblanswer.text = " The average = " & Average End Sub End Class (6) 2.2 Add your examination number as a comment. (1) 2.3 Print the source code. Save the solution and use the code for the next question. (1) [8] QUESTION 3 The program now gives the correct output results, but there is still some refining to be done. The program is not user-friendly. This means that the program should cater for mistakes made by the average user. You now have to make the program more user-friendly and stable. You may have to make the user interface (form) bigger to fit the new controls that have to be added. 3.1 The program must have an Exit button that will give the user an option to leave the program. (2) 3.2 After the user has entered the data and the calculation has been done, the data from the two TextBoxes must be cleared. (1) 3.3 The program should warn the user when a value smaller than ONE (1) has been entered in any of the TextBoxes. HINT: Make use of the same Label in which the answer for the calculations is displayed. (6) 3.4 Provide the user with a button to clear ALL the values in the program. (2)

9 ( ) -9- NC1900(E)(N27)V 3.5 To make the code more streamline, you are instructed to make use of a Function to calculate the average. You have to create your own function and it should be called CalcAverage(). (6) 3.6 Make a screen dump of the new user interface. Add your examination number to the name of the form. (2) 3.7 Print the edited source code and save the solution. (1) [20] QUESTION 4 You are given a task by the science teacher at your college to write a complete program which will allow the user to convert degrees Celsius to degrees Fahrenheit or vice versa. Use a function to do the conversions. The conversion formulae are: f = (9/5) * c + 32 for converting Celsius to Fahrenheit C = (f -32) * (5/9) for converting Fahrenheit to Celsius The main program offers the choice between C to F or F to C. 4.1 Make use of TWO GroupBoxes. In GroupBox 1 the user can convert C to F and in GroupBox 2 F to C. (2) 4.2 The user will make use of a button to enable the GroupBox in which the conversion has to be made. (4) 4.3 Provide a Clear button to the form. The Clear button has to disable both of the GroupBoxes. (2) 4.4 Provide an Exit button to the form. (2) 4.5 The user will click on the Calculate button to show the results of the calculations. Only ONE button should be used for both types of conversions. (2) 4.6 Answers have to be displayed as follows, for example: -40 deg C = -40 deg Far 45 deg Far = 7.2 deg C Create the program and convert 56 deg C to deg Fahrenheit. The user should not be allowed to enter values bigger than 200 or smaller than -200 deg. (8) 4.7 Add the needed comments to your code. Your examination number should appear as a comment at the top of your code. (4)

(10041023) -10- NC1900(E)(N27)V 4.8 Make a screen dump of your program with the above conversion. (1) 4.

10 ( ) -10- NC1900(E)(N27)V 4.8 Make a screen dump of your program with the above conversion. (1) 4.9 Print the source code. (1) 4.10 An appropriate screen design should be used. Make a screen dump. BELOW IS AN EXAMPLE OF WHAT THE SCREEN SHOULD LOOK LIKE Label for answer. Centre text. (6) [32]

11 ( ) -11- NC1900(E)(N27)V QUESTION 5: ACCESS - DATABASE You are working for a company that sells furniture to wholesalers. Your company needs a database to help with the keeping of stock. Various reports will have to be generated from queries and forms. You have been provided with sample data by your superior to help you to setup and test the database. The database has to consist of TWO (2) tables that are joined (relation). Use the information below to set up to 2 tables using MSAccess. You can use your own field names. The field names have to be descriptive of its content. Save the database as ABC Furniture and your examination number. For both tables you have to decide on the following: Field Name Data type Field size Decide on a primary key for both tables TABLE1 Stock Detail Product name longest name 20 Product code e.g. COU34565 Amount in stock - company keeps maximum of 20 items Re-order level e.g. 3 Date ordered e.g. 23/02/2009 Price Rxxxxx.xx On order Yes/No Create the data structure for Table 1, using the above information and key in the following data and save the table as Stock Detail and your examination number. Product name Product code Amount in stock Reorder level Date ordered Price ASD Fax 230 Fax /12/2008 R N LIM Chair De-Lux Lim /03/2009 R Y EXX DVD Recorder Exx /11/2008 R N HANDY Cam 230 Han /12/2008 R Y Lamp Shade pink Lam /10/2008 R50.00 N Gas Heater 3 burner Gas /10/2008 R N Coffee Table Pine Cof /03/2009 R Y Carpet Persian Red Car /12/2008 R N Cabinet Cab /02/2009 R N On order

(10041023) -12- NC1900(E)(N27)V TABLE2 Customer Detail Product code e.g. COU34565 Cust ID e.g. BEARS23 Date purchased 24/02/2009 Cost Rxxxxx.

12 ( ) -12- NC1900(E)(N27)V TABLE2 Customer Detail Product code e.g. COU34565 Cust ID e.g. BEARS23 Date purchased 24/02/2009 Cost Rxxxxx.xx Create the data structure for Table 2, using the above information and save it as Customer Detail and your examination number 5.1 Set up a one-to-one relationship (join) between the two tables. You must decide which fields will be used to join the two tables. Make a screen dump of the relationship. (1) 5.2 Print the database structure for the following: Stock Detail Customer Detail (7) (6) Use: -> Tools Analyse Documenter Select table and print. 5.3 Print the data of Stock Detail and use landscape orientation. (2) 5.4 Sort the data in ascending order according to the amount of On order and the Amount in stock and print it again. (2)

$The clipart can be found in the directory C:\NOV 2009 PRACTICAL\COUCH PICTURE on the hard disk. Insert your examination number as part of the name of the form, make a screen dump and print it. (4) 5.$

13 ( ) -13- NC1900(E)(N27)V 5.5 Create a form that you can use to add the new data in the table below. Edit the form to look like the figure below. The clipart can be found in the directory C:\NOV 2009 PRACTICAL\COUCH PICTURE on the hard disk. Insert your examination number as part of the name of the form, make a screen dump and print it. (4) 5.6 Add the following data to the table: Product name Product Amount in Re-order Date Price On code stock level ordered order MAX TV Max /12/2008 R N VCR COMBO Tx5 Vcr /03/2009 R Y MYFY STOVE T45 Myf /11/2008 R N VACUUM F2400 Vac /03/2009 R Y CARPET CHEAP Car /03/2009 R45.00 Y MATTRESS Queen Mat /10/2008 R N WASHING MACH 34 Was /03/2009 R Y TUMBLE WET-DRY Tum /12/2008 R N BOOKSHELF 45 Boo /02/2009 R N Sort the data according to the On order level ascending and print the data. (2) 5.7 Create the following query: Stock items of which there are less than 10 on hand The price is more than R Display ONLY the following fields: Amount in stock, Re-order level, Reorder date, Product name Print the SQL statement. Save the query as Stock_Query1. (6)

(10041023) -14- NC1900(E)(N27)V 5.8 Run the query and print it. (3) 5.9 Create a new form in which the client (code: BEARS23) purchases can be captured.

14 ( ) -14- NC1900(E)(N27)V 5.8 Run the query and print it. (3) 5.9 Create a new form in which the client (code: BEARS23) purchases can be captured. The form should look like the figure below: The client buys two items on 01/03/2009: 1. MYFY STOVE T45 2. BOOKSHELF 45 He buys again two items on 03/03/2009: 1. VACUUM F ASD Fax 230 Save the form as BEARS23 and your examination number. Make a screen dump of the form and print it. (5) 5.10 Print ONLY the data for BEARS23. (2)

15 ( ) -15- NC1900(E)(N27)V Create a corporate report using the Stock_Query Group on the Re-order level of the stock Change the heading of the report to Re-order Report Add your examination number to the top, right-hand side of the report Adjust the alignment of the columns to make the report more readable Sort according to the name of the product The report must be in stepped layout and printed portrait Save the report as your examination number Make a printout of the report. (10) [50] TOTAL: 150

NATIONAL CERTIFICATE (VOCATIONAL) OFFICE DATA PROCESSING NQF LEVEL 3 SUPPLEMENTARY EXAMINATION 2010

NATIONAL CERTIFICATE (VOCATIONAL) OFFICE DATA PROCESSING NQF LEVEL 3 SUPPLEMENTARY EXAMINATION 2010 (3061023) 22 February (Y-Paper) 13:00 16:00 INSTRUCTIONS MUST BE HANDED TO INVIGILATORS AND CANDIDATES