5.1 The travel agency uses the interface below as a booking form for holiday accommodation - NSC Information Technology - Question 5 - 2017 - Paper 2

Verified data means that the user has confirmed the correctness of the information they have entered. This can include checking against a checklist or confirmation prompts that display the entered information for the user to review and approve.

For example, after filling out the booking form, the travel agency might show a summary of the booking details for users to verify before final submission.

The component suggested for data input in QUESTION 5.1.1, which specifies input types like combo boxes or radio buttons, helps ensure that valid data is entered by limiting user choices to predetermined options. By using these components, the system can prevent invalid inputs that do not match the specified types of accommodation. For example, if a combo box is used for 'Type of accommodation,' users can only select from valid types like 'campsite,' '4-bedroom house,' 'B&B,' and 'hotel.' This effectively reduces the likelihood of data entry errors.

A logical error occurs when a program runs without crashing but produces incorrect results or outputs. This can be due to flawed logic or miscalculations in the code. For instance, if the algorithm incorrectly calculates totals or mismanages loop counters, it may lead to the wrong number being stored or displayed.

Replace x and y with the appropriate indices to store the total in the array. The corrected statement would be:

arrVisitors[counter1, 3] ← total

This places the total visitor count for each month in the third column of the 2D array.

The correct position to insert this statement in the algorithm is option A: Between lines 6 and 7. This placement ensures that the total is recorded after it has been correctly calculated and before the algorithm proceeds to the next iteration.

The changes needed in lines 2 to 5 of the algorithm are:

1. Line 2: Change the loop to determine totals for each location.

   For counter1 ← 1 to 12
   total ← 0
   
   For counter2 ← 1 to 2
   total ← total + arrVisitors[counter2, counter1]
   

   This adjustment ensures that the algorithm adds the correct values from the array by swapping the indices in the summation process.

To swap the values for 'Fun park' and 'Animal park' for May, you can use the following pseudocode:

temp ← arrVisitors[5, 1]
arrVisitors[5, 1] ← arrVisitors[5, 2]
arrVisitors[5, 2] ← temp

This code temporarily holds one of the values in a variable, thus allowing for the safe exchange of the two values within the array.

OOP stands for Object-Oriented Programming. It is a programming paradigm based on the concept of 'objects,' which can contain data and code that manipulates that data.

The purpose of a constructor method in a class is to initialize objects when they are created. It sets the initial values of attributes and can allocate resources as needed. Constructors ensure that necessary set-up steps are followed whenever an instance of a class is instantiated.

It is not necessary to have 'numberOfDays' as an attribute of the class because its value can be calculated from other attributes, such as 'startDate' and 'endDate.' By dynamically calculating this value, it reduces redundancy and keeps the object streamlined.

Declaring the method 'calcDays()' as a private method means that it cannot be accessed from outside the class. This practice encapsulates the method's functionality within the class, ensuring that the calculation of days can only be influenced by the object's internal data, which helps maintain data integrity.

A setStartDate() method may be useful to allow updates to the starting date of a booking after its initial creation. This flexibility can be crucial in scenarios where customers need to modify their bookings, ensuring that the object's state accurately reflects any changes without requiring a complete recreation of the object.

The purpose of a toString() method is to provide a string representation of an object. This method typically returns a formatted string that includes the class's attributes, enabling easier readability and debugging, and facilitating output when objects are printed or logged.