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When the item of luggage leaves the check-in area, it is sorted and delivered to the aircraft - Edexcel - GCSE Computer Science - Question 7 - 2020 - Paper 1
Question 7
When the item of luggage leaves the check-in area, it is sorted and delivered to the aircraft. (a) A printed label is attached to each item. Each label is made up o... show full transcript
Worked Solution & Example Answer:When the item of luggage leaves the check-in area, it is sorted and delivered to the aircraft - Edexcel - GCSE Computer Science - Question 7 - 2020 - Paper 1
Step 1
Sub-part (a)(i) - Look Up Table
Answer
To determine whether a label is valid, it’s essential to analyze the structure of the label and inspect it against the predefined valid labels. The generalized structure of the label is as follows:
- First character: 'D' or 'I'
- Second field: Destination airport code
- Third field: Airline code
- Fourth field: Flight number
- Last field: Four-digit item number
This structure ensures that each label conforms to accepted standards.
Step 2
Sub-part (a)(ii) - Validate Label Formatting
Answer
To validate the format of the labels:
- Ensure the first character is either 'D' or 'I'.
- Check that each section of the label is separated by hyphens, with no extraneous characters.
- The airline code and flight number must be present in the correct order.
- The final segment must consist of exactly four digits.
Following these criteria will confirm a properly formatted label.
Step 3
Sub-part (b) - Output Box for 'Pushing'
Answer
The implementation of an output box for 'pushing' would involve creating a structured output mechanism that displays the end result. This could include:
- Defining a clear output box format.
- Ensuring the output box updates dynamically based on user input.
- Making sure the information displayed is relevant to the items processed.
By adhering to these functional requirements, the output box can effectively serve its purpose.