Home Learn step by step Memorise Key terms Flashcards Notes Master answers Past questions Multiple choice Mock exam Practice & marker

Software Engineering › Learn step by step › Y12 Software Automation

Item 308 of 426 · Year 12: Software Automation, 15 of 35

Decision tree

Diagram Key terms bank

Jump to a topic

See every item in the sequence

Definition

Decision tree Y12 Software Automation Diagram

A flowchart-like model where each internal node tests a condition, branches are outcomes and leaves are decisions or predictions.

Example: Is it raining? yes: take umbrella; no: next test.

Found in: syllabus, course specifications, sample exam and familiarisation guidelines, school notes.

Decision tree (diagram) Diagrams and tools Diagram

Represents all possible combinations of decisions and their resulting actions. Each path leads to another decision or a final action.

Example: If temperature > 25 then fan on.

Found in: syllabus, course specifications, sample exam and familiarisation guidelines, school notes.

Short version to memorise (key terms bank)

Diagram of decisions and resulting actions (also an ML model).

Where you'll use it in the test

Syllabus area: Y12 Software Automation Diagrams and tools.

Question types it can appear in

Drawing: Decision tree: Draw or complete a decision tree (sample Q20, fam Q7) Decision tree (diagram): Draw or label it in the online drawing tool.
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

Software Automation (Part B, C). Part letters follow each paper’s own layout.

How to use it

A model sentence

General advice, built from the definition and example above

Diagram: “A flowchart-like model where each internal node tests a condition, branches are outcomes and leaves are decisions or predictions.” Then apply it: Is it raining? yes: take umbrella; no: next test.

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

General advice

No linked question shows the command word for this term. Across the past drawing 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.

Go deeper

Flashcard: Decision tree in Software Automation (Year 12) · study that set
Flashcard: Decision tree (diagram) in Diagrams and Modelling Tools (Years 11 and 12) · study that set
Memorise: Decision trees
Memorise: Drawing rules: DFD, structure chart, storyboard, decision tree, class diagram, ERD
Key terms bank entry: Decision tree
Notes: Part 3. Where this has been examined (see ../../question_bank.md) (Software Automation (Year 12))
Full term page: every question, note and marking comment for Decision tree

Check yourself

Describe or sketch “Decision tree”: what it shows, its parts and when you would use it.

Reveal the answer

Decision tree: A flowchart-like model where each internal node tests a condition, branches are outcomes and leaves are decisions or predictions.

Example: Is it raining? yes: take umbrella; no: next test.

Decision tree (diagram): Represents all possible combinations of decisions and their resulting actions. Each path leads to another decision or a final action.

Example: If temperature > 25 then fan on.

Could be tested as: Drawing, Short answer, Multiple choice.

Quick multiple choice

In a decision tree, a leaf node represents:

The root of the tree
A final outcome or classification
A question about the data
A weighting between neurons

Show the answer

Internal nodes test conditions, branches are outcomes of tests and leaves are the final decisions.

Source: original (written for this study pack; not a NESA question). Open it in the multiple-choice bank.