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Item 309 of 426 · Year 12: Software Automation, 16 of 35
Neural network
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Definition
A model made of connected layers of nodes (neurons): an input layer, one or more hidden layers and an output layer; connection weights are adjusted during training.
Example: 2025 Q25: a neural network is one technique within AI.
Found in: syllabus, course specifications, 2025 HSC marking guidelines, school notes.
Layers of weighted nodes trained by backpropagation.
Where you'll use it in the test
Syllabus area: Y12 Software Automation.
Question types it can appear in
- Short answer: Distinguish a neural network from AI (2025 Q25)
- Multiple choice: Pick the option that matches the definition or example.
- Python: Write or complete it in the online Python tool.
Where it has appeared in the paper
Software Automation (Part A). Part letters follow each paper’s own layout.
Related past questions
- 2025 HSC Q25 (5 marks): Patterns in human behaviour; neural networks (virtual personal assistant) Software Automation (Part A) · 5 marks
How to use it
A model sentence
“A model made of connected layers of nodes (neurons): an input layer, one or more hidden layers and an output layer; connection weights are adjusted during training.” Then apply it: 2025 Q25: a neural network is one technique within AI.
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
- Explain: Relate cause and effect; make the relationship between things evident; provide why and/or how. (2025 HSC Q25 (5 marks): Patterns in human behaviour; neural networks (virtual personal assistant))
Official worked answer
2025 HSC Q25 (5 marks): Patterns in human behaviour; neural networks (virtual personal assistant) (5 marks): official criteria and sample answer
Criteria
5: Explains how the neural network supports the VPA AND includes one positive AND one negative impact. 4: Explains how the NN supports the VPA OR outlines how it supports the VPA and includes one positive AND one negative impact. 3: Outlines features of a neural network AND/OR impacts. 2: Outlines a feature of a neural network OR an impact, OR identifies features/impacts. 1: Some relevant information.
Sample answer
Neural networks recognise natural language patterns to categorise common support queries, such as lost luggage, and use nodes to assist with processing. They assess language tone to gauge frustration or urgency, allowing the virtual personal assistant to recommend specific phrasing for customer service staff. For instance, calming language may be suggested for distressed customers. By tracking customer ratings and turnaround times, the neural network uses weightings to refine recommendations to prioritise high-frequency queries or improve suggestions for poorly rated interactions. While this system streamlines support processes and improves response accuracy, it may also impact the role of customer service staff. As the neural network learns from interactions, staff may rely more on its recommendations, potentially reducing their familiarity with emerging query trends or response strategies. Customers may come to expect faster, more precise service, raising the standard for human interactions.
Go deeper
- Flashcard: Neural network in Software Automation (Year 12) · study that set
- Memorise: Decision trees
- Key terms bank entry: Neural network
- Notes: Research models used by software engineers to design and analyse ML, including decision… (Software Automation (Year 12))
- Master answer: hsc2025-q25 (5 marks, extended response (explain)) (Master model answers: Software Automation)
- Notes: Neural networks (Software Automation (Year 12))
- Full term page: every question, note and marking comment for Neural network
Check yourself
Explain “Neural network” in one sentence, give an example, and name a question type that could test it.
Reveal the answer
A model made of connected layers of nodes (neurons): an input layer, one or more hidden layers and an output layer; connection weights are adjusted during training.
Example: 2025 Q25: a neural network is one technique within AI.
Could be tested as: Short answer, Multiple choice, Python.
Quick multiple choice
In a neural network, what is adjusted during training to improve predictions?
- The number of pixels on the screen
- The names of the nodes
- The weightings on the connections between nodes
- The programming language
Show the answer
C
Training repeatedly compares predictions to known answers and adjusts weights to reduce error (2025 Q25 asked about nodes and weightings).
Source: original (written for this study pack; not a NESA question). Open it in the multiple-choice bank.