VCE Software Development U3O1 Word Scramble: Data sources and files to Graphical user interfaces (Modules 114–124)
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Date:
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Word scramble
Unscramble the letters and write each key term on the line.
1
LEE.RMLRT.XETENEEMETE
Python module that parses an XML file into a tree of elements. Use find() and findall() to reach elements and .text to read their values.
2
ADITAILNVO
An automatic check that data is reasonable and in the right form when entered. It blocks bad data early, but it cannot prove the data is true (a valid age of 15 could still be wrong).
3
LAONTIDAVI KCCHE
A test that an entry is sensible. Types include presence, data type, range, length, format and list. Each one tests a different property of the entry.
4
FI LRPUV.TASIE() == '':
An existence check tests that a value was actually entered. strip() removes spaces, so this is True for empty or space-only input, and an error message can be shown.
5
YPTE KCEHC
A check that input is the expected data type, using .isdigit(), try/except around int() or float(), or isinstance(). input() is always text, so check before converting.
6
1 <= GEA <= 210
A range check: tests that a number lies between a minimum and a maximum (inclusive here). Values outside the limits, such as 0 or 121, are rejected as invalid.
7
HEILW OTN AILDV:
A loop that keeps asking for input again until the answer is valid, so bad data (like an age of -5) can't get into your program. Show an error message each time.
8
FED SX_VALAE_IDT(IETG):
A validation function that runs the existence, type and range checks in order and returns True or False, so the same checks can be reused for many inputs and tested.
9
IGU
A graphical user interface: windows and controls like buttons and text boxes the user clicks or types in. The program waits for events, such as a click, and responds to each one.
10
ORTO = KK.TT()
Creates the main tkinter window after import tkinter as tk. Call root.mainloop() at the end to show the window and wait for events like clicks.
Answer Key
VCE Software Development U3O1 · Modules 114–124
1LEE.RMLRT.XETENEEMETE → xml.etree.ElementTree — Python module that parses an XML file into a tree of elements. Use find() and findall() to reach elements and .text to read their values.
2ADITAILNVO → validation — An automatic check that data is reasonable and in the right form when entered. It blocks bad data early, but it cannot prove the data is true (a valid age of 15 could still be wrong).
3LAONTIDAVI KCCHE → validation check — A test that an entry is sensible. Types include presence, data type, range, length, format and list. Each one tests a different property of the entry.
4FI LRPUV.TASIE() == '': → if value.strip() == '': — An existence check tests that a value was actually entered. strip() removes spaces, so this is True for empty or space-only input, and an error message can be shown.
5YPTE KCEHC → type check — A check that input is the expected data type, using .isdigit(), try/except around int() or float(), or isinstance(). input() is always text, so check before converting.
61 <= GEA <= 210 → 1 <= age <= 120 — A range check: tests that a number lies between a minimum and a maximum (inclusive here). Values outside the limits, such as 0 or 121, are rejected as invalid.
7HEILW OTN AILDV: → while not valid: — A loop that keeps asking for input again until the answer is valid, so bad data (like an age of -5) can't get into your program. Show an error message each time.
8FED SX_VALAE_IDT(IETG): → def is_valid_age(text): — A validation function that runs the existence, type and range checks in order and returns True or False, so the same checks can be reused for many inputs and tested.
9IGU → GUI — A graphical user interface: windows and controls like buttons and text boxes the user clicks or types in. The program waits for events, such as a click, and responds to each one.
10ORTO = KK.TT() → root = tk.Tk() — Creates the main tkinter window after import tkinter as tk. Call root.mainloop() at the end to show the window and wait for events like clicks.