NSC Information Technology GUI components: 5.1 You have been asked to assis

Question

5.1 You have been asked to assist in creating an application to control a smart television set (TV). The GUI below has already been designed.

Identify TWO different types of components on the GUI above which can be replaced with more suitable components and motivate why.

5.2 Study the following segment of code:

AssignFile(tFile, 'countries.txt');
Reset(tFile);
While not eof(tFile) do
Begin
  ReadLn(tFile, sCountry);
  readOutput.Lines.Add(sCountry)
End;
CloseFile(tFile);

5.2.1 Explain the purpose of the AssignFile-statement with specific reference to the two arguments tFile and 'countries.txt'.

5.2.2 Explain why an error will occur if the Reset(tFile) in the given code is replaced with Append(tFile).

5.2.3 Explain why no output will be displayed if Reset(tFile) is replaced with Rewrite(tFile).

5.3 The first two steps of the pseudocode to calculate and display the HCF (highest common factor) of two numbers entered by the user are:
Step 1: Input iLower (smaller number)
Step 2: Input iUpper (bigger number)

Complete the pseudocode by writing down the remainder of the steps to solve the problem.
NOTE: The HCF is the biggest number that divides both numbers entered without a remainder.

5.4 You have been supplied with the following segment of code:

Array declaration and initialisation:
arrNames: array [1 .. 5] of String;
arrNames := ('Sam', 'Phillip', 'Adam', 'Steve', 'Ziaan');

Line No.  Sort code:
1     bChanged := True;
2     while bChanged do
3     begin
4         bChanged := False;
5         for i := 1 to length(arrNames) - 1 do
6         begin
7             if (arrNames[i] > arrNames[i + 1]) then
8             begin
9                 sTemp := arrNames[i];
10                arrNames[i + 1] := arrNames[i];
11                arrNames[i] := sTemp;
12                bChanged := True;
13            end;
14        end;
15    end;

Study the code provided above and answer the questions below.

5.4.1 The code provided above sorts the names in the array in alphabetical order.
Which line of code will ensure that the names are sorted in alphabetical order?

5.4.2 Explain why a runtime error will occur if the value of 1 is not provided from the length of the array in line 6.

5.4.3 Describe the purpose of line 9 to line 11 of the provided code by explaining what the code does. You may use a diagram or simple illustration to support your answer.

5.1 You have been asked to assist in creating an application to control a smart television set (TV) - NSC Information Technology - Question 5 - 2024 - Paper 2

Worked Solution & Example Answer:5.1 You have been asked to assist in creating an application to control a smart television set (TV) - NSC Information Technology - Question 5 - 2024 - Paper 2

Identify TWO different types of components on the GUI above which can be replaced with more suitable components and motivate why.

Explain the purpose of the AssignFile-statement with specific reference to the two arguments tFile and 'countries.txt'.

Explain why an error will occur if the Reset(tFile) in the given code is replaced with Append(tFile).

Explain why no output will be displayed if Reset(tFile) is replaced with Rewrite(tFile).

Complete the pseudocode by writing down the remainder of the steps to solve the problem.

Which line of code will ensure that the names are sorted in alphabetical order?

Explain why a runtime error will occur if the value of 1 is not provided from the length of the array in line 6.

Describe the purpose of line 9 to line 11 of the provided code by explaining what the code does.

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