False positives and false negatives in Software testing

Simply put,

False Positive is the situation when the functionality is working, but yet it is marked as ‘failed’ in testing/practical application

False Negative is the situation when the functionality is not working, but yet it is marked as ‘passed’ in testing/practical application

Real-life examples

1. Software coding: Thorough testing results in correct and valid code to get rejected (due to mismatch of understanding between coder and tester)

2. Healthcare sector: Low-cost medical tests administered detects illness that warrants further elaborate testing (which then reveals absence of the illness)

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