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Inputs, outputs and purpose of an algorithm
Term Check Y11 Programming Fundamentals
Definition
When analysing an algorithm, identify the data it takes in (inputs), the results it produces (outputs), what it is designed to do (purpose) and how it connects to other subroutines.
Example: Inputs: array of marks. Output: the average. Purpose: calculate the class mean.
Check this one: Not found word-for-word in the supplied syllabus, specifications, marking guidelines or notes; the definition is standard computing knowledge, so check it against your class notes.
Where it is used in the test
Syllabus area: Y11 Programming Fundamentals.
Question types it can appear in
- Code reading: Code or algorithm reading: interpret a fragment and state its output or purpose.
- Pseudocode: Use it correctly in the exam pseudocode editor.
- Short answer: State what the algorithm does
Where it has appeared in the paper
The Software Engineering Project (Part A). Part letters follow each paper’s own layout.
Related past questions
- 2025 HSC Q17 (3 marks): Algorithm design The Software Engineering Project (Part A) · 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: Inputs, outputs and purpose of an algorithm in Programming Fundamentals (Year 11) · study that set
- Memorise: Software development steps and algorithm design
How to use it in an answer
A model sentence
“When analysing an algorithm, identify the data it takes in (inputs), the results it produces (outputs), what it is designed to do (purpose) and how it connects to other subroutines.” Then apply it: Inputs: array of marks. Output: the average. Purpose: calculate the class mean.
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 pseudocode 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
- Pseudocode: Write HSC-style pseudocode: capital keywords, paired END words, indentation; initialise variables; output the required result.
- Short answer: One clear point per mark, use the stimulus and course terms, and answer the command word.
What the marking guidelines and feedback say
Marker feedback: use pseudocode control structures accurately; iterate an array and sum it; apply relational operators correctly; use the stimulus to choose the right structures.
Common mistakes
- Check the sources: Not found word-for-word in the supplied syllabus, specifications, marking guidelines or notes; the definition is standard computing knowledge, so check it against your class notes.
- Pseudocode questions (2025 HSC exam Q17): use pseudocode control structures accurately; iterate an array and sum it; apply relational operators correctly; use the stimulus to choose the right structures.
- 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: Computational thinking · Algorithm · Sequence · Selection · Iteration (repetition) · Divide and conquer · Backtracking · Top-down design · Bottom-up design · Abstraction · Refinement · Pseudocode · Flowchart · Subroutine (module, subprogram, procedure)