14. Which test is a valid test of the algorithm?
Answer: C
Input 98.6. Ensure output is 'OK.'
The algorithm correctly outputs 'OK' when the input number is within the specified range of 98.3 to 98.9. Since 98.6 falls within this range, this test is valid.
A) Input 99.9. Ensure output is '98.9.'
This option is incorrect because the algorithm is designed to output either 'OK' or 'Not OK,' not a numerical value like '98.9.' Therefore, this test does not effectively validate the algorithm's functionality.
B) Input 99.9. Ensure output is 'OK.'
This option is also incorrect as an input of 99.9 is outside the specified range of 98.3 to 98.9. The expected output should be 'Not OK,' making this test invalid for assessing the algorithm.
C) Input 98.6. Ensure output is 'OK.'
This option is correct, as 98.6 is within the valid range of 98.3 to 98.9. The output should indeed be 'OK,' validating the algorithm's proper function.
D) Input 98.6. Ensure output is 'Not OK.'
This option is incorrect since 98.6 falls within the valid range. The expected output should be 'OK,' thus this test does not correctly assess the algorithm's intended behavior.
Conclusion
The correct answer is option C, as it accurately tests the algorithm's output when provided with a valid input within the specified range. All other options either present incorrect expected outputs or test conditions that do not align with the algorithm's defined parameters.