NSC Information Technology Object-oriented programming: You are organising a small LAN e

Question

You are organising a small LAN event. The participants will have to complete a registration form. The information will be used to keep track of their results as well as food orders. Access codes will be needed to gain access to the premises where the event will take place.

5.1 To create the access code the user will have to enter their name and surname. All the vowels and spaces need to be removed. The first and last character must be uppercase and a '#' must be added at the end.

Write an algorithm to create the access code. (7)

5.2 The following UML diagram is given. Answer the following questions.

objLAN
- Name
- Surname
- ID
- Food
- TeamName

+ constructor create
+ toString : string;
+ getTeamName : string;
+ CalculateCost
+ getDOB : string;
+ getGender : char;

5.2.1 What does the ':' indicate? (1)
5.2.2 What is the difference between a mutator and accessor method? Give an example of each making use of objLAN. (4)
5.2.3 What is the purpose of a constructor? (2)
5.2.4 What is the purpose of a toString method? (1)

5.3 Understanding a flow chart is seen as basic knowledge a programmer should have. Another concept that is crucial is the ability to use a trace table to track the input, processing and the expected output.

Put your skills and knowledge to the test, by completing the trace table for the following flow chart.

START
    Engine = 0
    Count = 0
    Number = 0

INPUT Size
    If Size = 1?
        Yes
            Average = Engine / Number
            OUTPUT Average, Count
        STOP
    No
    If Size = 1.5?
        Yes
            Count = Count + 1
    No
        Number = Number + 1
    Engine = Engine + Size

Draw a trace table with the following headings:
- Engine
- Count
- Number
- Size
- Average
- OUTPUT

The input values are the following:
1.8; 2.0; 1.0; 1.3; 1.0; 2.5; 2.0; 1.3; 1.8; 1.3; -1

You are organising a small LAN event - NSC Information Technology - Question 5 - 2017 - Paper 2

Worked Solution & Example Answer:You are organising a small LAN event - NSC Information Technology - Question 5 - 2017 - Paper 2

5.1 Write an algorithm to create the access code.

5.2.1 What does the ':' indicate?

5.2.2 What is the difference between a mutator and accessor method? Give an example of each making use of objLAN.

5.2.3 What is the purpose of a constructor?

5.2.4 What is the purpose of a toString method?

5.3 Draw a trace table.

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Engine	Count	Number	Size	Average	OUTPUT
0	0	0	1.8	-	-
1.8	1	1	2.0	-	-
3.8	2	2	1.0	-	-
4.8	3	3	1.3	-	-
6.1	4	4	1.0	-	-
7.1	5	5	2.5	-	-
9.6	6	6	2.0	-	-
11.6	7	7	1.3	-	-
12.9	8	8	1.8	-	-
...	...	...	...	...	...
16.5	...	...	-1	-	-