Software Engineering › Key terms › Y12 Secure Software Architecture › Error handling
Error handling
Term Y12 Secure Software Architecture
Definition
Detecting and managing problems (try and except in Python) so the program fails safely, shows a generic message and does not leak internal details.
Example: try: int(x) except ValueError: print("Enter a number")
Found in: syllabus, school notes.
Where it is used in the test
Syllabus area: Y12 Secure Software Architecture.
Question types it can appear in
- Python: try / except
- Short answer: Define, outline or explain it and tie it to the scenario.
- Multiple choice: Pick the option that matches the definition or example.
Where it has appeared in the paper
Secure Software Architecture (Part A, B). Part letters follow each paper’s own layout.
Related past questions
- 2025 HSC Q19 (3 marks): Developing secure code (Python) Secure Software Architecture (Part A) · 3 marks
- Sample exam Q18b (3 marks): Developing secure code (Python input validation) Secure Software Architecture (Part B) · 3 marks
These are the questions the flashcard set links to this term. Open each one and compare your answer with its marking criteria.
Study links
- Flashcard: Error handling in Secure Software Architecture (Year 12) · study that set
- Memorise: Defensive data input handling: validation, sanitisation, error handling
- Notes: Defensive data input handling: validation, sanitisation, error handling (Secure Software Architecture (Year 12))
- Notes: Design, develop and implement code using defensive data input handling practices,… (Secure Software Architecture (Year 12))
- Notes: Interpret and apply fundamental software development steps to develop secure code,… (Secure Software Architecture (Year 12))
- Notes: Web development system: front end, back end, databases (Programming for the Web (Year 12))
How to use it in an answer
A model sentence
“Detecting and managing problems (try and except in Python) so the program fails safely, shows a generic message and does not leak internal details.” Then apply it: try: int(x) except ValueError: print("Enter a number")
In a short answer, give the definition in your own words first, then tie it to the situation in the question. Do not copy the example above unless it fits the scenario.
Command words used with it
No linked question shows the command word for this term. Across the past python and short answer questions in this bank the words used most are: Explain, Outline, Describe, Compare, Classify, Analyse. Check the actual word in your question.
Technique for the question types
- Python: Write code that runs: indentation, quotes, define functions before calling them, print the required output, meet every listed requirement.
- Short answer: One clear point per mark, use the stimulus and course terms, and answer the command word.
- Multiple choice: Read all four options, rule out wrong ones, pick one; no penalty for guessing so never leave blank.
What the marking guidelines and feedback say
Marker feedback: process string inputs; use a selection structure; code must execute in the environment; use correct indentation; call functions in the main program after defining them.
Remember to call the function in the main program after defining it, e.g. print(validate_username(input('Username: '))).
Worked answers from the marking guidelines
2025 HSC Q19 (3 marks): Developing secure code (Python) (3 marks): criteria and sample answer
Criteria
3: Correct code for the problem. 2: Partially correct code that includes a correct selection structure OR password creation. 1: Some understanding of the scenario and Python.
Sample answer
uName = input('What is your username?') password = input('What is your password?') passwordP1 = uName[:3] passwordP1= passwordP1 + '123' if passwordP1 == password: print ('Welcome!') else: print ('Incorrect password entered')
Sample exam Q18b (3 marks): Developing secure code (Python input validation) (3 marks): criteria and sample answer
Criteria
3: Correct function in Python to check whether a username satisfies the rules. 2: Partially correct function. 1: Some understanding of the problem and Python.
Sample answer
def validate_username(username): valid = True
# length check
if len(username) < 8:
valid = False
elif (not username[0].isupper()):
valid = False
elif (not username[-2].islower()):
valid = False
elif (not username[-1].isdigit()):
valid = False
return valid
Common mistakes
- Python questions (2025 HSC exam Q19): process string inputs; use a selection structure; code must execute in the environment; use correct indentation; call functions in the main program after defining them.
- Python questions (2025 HSC exam Q26): replicate the grid; use the random library; use selection and looping to access the list; include a method of checking the number of values; use meaningful variable names and constants; avoid overly complex structures such as nested IF loops.
- Use the term exactly as the syllabus words it, then link it to the scenario in the question; the 2025 feedback repeatedly rewards using the stimulus.
- Answer the command word: outline gives main points only, explain gives a reason or cause, discuss gives both sides.
Related terms
Same group in the syllabus: Defensive data input handling · Input validation · Sanitisation · Application programming interface (API) · Excessive data exposure · Memory management · Session management · Exception management