NSC Information Technology Defensive programming: The application form below was u

Question

The application form below was used by a talent search organisation for candidates to enter a song writing competition.

BEST SONG WRITER COMPETITION

Name ______________________________________ 
Surname ___________________________________
Gender: [ ] Male [ ] Female    Submit

Genre of music ______________________________

Date of birth _______________________________

5.1.1 Three selection components were used in the application.
Motivate the use of selection components rather than entry fields for obtaining information from users.

5.1.2 The information captured in the application above will be saved in a text file.
State the benefit of saving the applicants’ details in a text file rather than using an array.

5.1.3 The form requires a button to 'Close' the application.
Why would a bit button be more suitable to be used instead of a standard button?

5.2 The following segment of code was used as a part of a gaming contest. 
A number from 1 to 6 must be randomly generated. If the number is even, the square root of the number must be calculated, otherwise the square of the number must be calculated.

procedure frm05.btnQueue5_2Click(Sender: TObject);
var
  iNumber, iSqrt, iSquare: Integer;
  rDivision: Real;
begin
  iNumber := RandomRange(1,7);
  if iNumber mod 2 = 0 then
  begin
    iSqrt := SQRT(iNumber);
  end
  else
  begin
    iSquare := iNumber * iNumber;
  end;
  rDivision := iNumber / 0;
  ShowMessage(FloatToStr(rDivision));
end;

There are many errors in the segment of code above.
Give the line number in the code where EACH of the following errors occur and explain the reason for the error:

5.2.1 Syntax error
5.2.2 Logical error
5.2.3 Runtime error

5.3 A variable bFlag has been declared as a Boolean data type.
Indicate whether the following statements are CORRECT or INCORRECT:

5.3.1 The following two lines of code will result in the same answer:
Line 1: if bFlag then
Line 2: if NOT bFlag = True then

5.3.2 The statement NOT bFlag will always produce 'false' as the result.

5.4 Classes and objects are key aspects in object-oriented programming.
5.4.1 An access modifier determines the accessibility of the variables and methods of a class.
Give the default access modifier status of an attribute of a class.

5.4.2 Why will a method such as a toString method declared as public?

5.5 The person responsible for the IT department at the contest has been given the task to determine the output for a program segment, represented by the flowchart below.

[Flowchart]

The trace table below has been compiled to determine what the output of this program segment will be if the text Y&$6%@ has been entered as input.

Copy and complete the trace table in your ANSWER BOOK.

Text                  Count    Index    Text (Index) = one of Y&$6%@?
Index <= Length?    Count >=3 AND Length>=8?   Display

Y&$6%@

The application form below was used by a talent search organisation for candidates to enter a song writing competition - NSC Information Technology - Question 5 - 2023 - Paper 2

Worked Solution & Example Answer:The application form below was used by a talent search organisation for candidates to enter a song writing competition - NSC Information Technology - Question 5 - 2023 - Paper 2

Motivate the use of selection components rather than entry fields for obtaining information from users.

State the benefit of saving the applicants’ details in a text file rather than using an array.

Why would a bit button be more suitable to be used instead of a standard button?

Give the line number in the code where EACH of the following errors occurs and explain the reason for the error: 5.2.1 Syntax error

5.2.2 Logical error

5.2.3 Runtime error

5.3.1 The following two lines of code will result in the same answer:

5.3.2 The statement NOT bFlag will always produce 'false' as the result.

5.4.1 Give the default access modifier status of an attribute of a class.

5.4.2 Why will a method such as a toString method declared as public?

Copy and complete the trace table in your ANSWER BOOK.

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