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Code Lab9-12 · Code Lab: Specification and failure analysis

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Structured investigationComputer Science

Code Lab: Specification and failure analysis

Code Lab focus: computational models and testable algorithms. An ordinary trace passes, but a boundary input violates the specification.

Which Grade 9 specification and test evidence establish correct behavior for computational models and testable algorithms?

CourseComputer Science

RigorOn-level

Performance artifactExecutable test and debugging record

Evidence minimum2 evidence forms

Connect the written specification to an ordinary trace and one boundary test.

input
state
trace
specification

1Specify
2Predict trace
3Execute
4Analyze failure
5Debug
6Defend tradeoff
7Transfer

Model

Specification, inputs, and execution model

Execute 3 traces spanning ordinary, boundary, invalid, and adversarial inputs. Record state, output, and the first violated condition.

Specification: Define the expected Code Lab state transition before executing the trace.
Test suite: ordinary input, boundary input, invalid input, adversarial input
Failure signal: A state transition, output, or side effect diverges from the written specification.
Tradeoff: Compare correctness, trace cost, reliability, and consequences for users or data.

Input complexity49Boundary pressure27

Select the specification that can be falsified by ordinary, boundary, and adversarial inputs.

Evidence

Trace and failure analysis

Commit a falsifiable model and run the repeated trials to generate the dataset.

Executable test and debugging record

testable specification
reproducible trace
failed-case diagnosis
defended repair

Original World tools

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