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Testing 2
Invalid and erroneous data: Test rejection of unacceptable values
Syntax errors: Break the language's grammar
Logic errors: Valid code can produce the wrong behaviour
Runtime errors: Failures arise during execution
Testing 3
Test plans: Record inputs expected outcomes actual outcomes and actions
Refining an algorithm: Correct the cause and retain intended behaviour
Practical task: Design write test and refine a substantial program
Connections
Testing 2 → Testing 3: Diagnose the error category, correct its cause and repeat relevant tests.
