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Question
Computer Science
Posted about 1 month ago

A programmer develops the procedure maxPairSum () to compute the
sum of subsequent pairs in a list of numbers and return the maximum sum.
For example, for a list of [2, 3, 4, 1], the sums of subsequent pairs are
5 (from 2 + 3), 7 (from 3 + 4), and 5 (from 4 + 1). The procedure should
return the maximum sum of 7.
PROCEDURE maxPairSum (nums) {
i - 1
maxSum - 0
REPEAT UNTIL (i = LENGTH (nums) )
{
sum - nums [i] + nums [i + 1]
{
IF (sum > maxSum)
maxSum - sum
}
i+1
}
RETURN maxSum
}
The programmer tests it with maxPairSum [5, 4, -4, 3, 2]) and
sees a return value of 9.
Can the programmer conclude that the procedure works correctly for all
inputs?
Choose 1 answer:
Yes, that test case is sufficient proof that the procedure works as
A
intended for all possible lists of numbers.
No, since the expected return value is not 9 for that test case.
B
No, but the programmer can conclude that it works for all lists of
C
integers.
D
No, they've only verified that it works for that test case. Additional
analysis and reasoning is necessary.
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Answer from Sia
Posted about 1 month ago
D
Key Concept
Test Coverage
Explanation
A single test case is not sufficient to verify the correctness of a procedure for all possible inputs. Comprehensive testing, including edge cases and a variety of input scenarios, is necessary to ensure the procedure works correctly in all situations.

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