A function you have just made accepts only a single float or int as a input and performs a calculation. Which of the following set of test inputs, where each number is tested individually, is most likely to give you useful testing results?

Question

BlackTom AI · Accepted Answer

Including zero, both signs, integer and fractional values, and very large and very small magnitudes is the key idea for useful numeric testing; option C supplies all of those.

1) Relevant knowledge points and concepts
- Boundary and edge cases: zero, extremely large/small magnitudes.
- Sign coverage: positive and negative inputs.
- Type coverage: integers vs. floating-point (decimals).
- Floating-point precision and overflow/underflow potential (very large like 1e15, very small like 1e-15).

2) Step-by-step reasoning process
- A single simple set of tests should exercise likely failure modes: sign-dependent logic, division-by-zero, rounding/precision, and overflow/underflow.
- Check that zero is present (detects divide-by-zero or special-case logic).
- Check small nonzero magnitudes (1e-15) to reveal underflow or precision loss.
- Check large magnitudes (1e15) to reveal overflow or loss of precision in floating arithmetic.
- Include fractional values (1.5, -1.5) to test floating-point path versus pure integer path.
- Include simple +1 and -1 to test sign handling for common operations.

3) Intermediate steps (applied to choices)
- Option C contains: 1, 0, -1, 1.5, -1.5, 1e15, -1e15, 1e-15, -1e-15 — covers all categories above.
- Options A, B, D miss important categories as explained below.

4) Why the correct answer is correct
- Option C intentionally spans zero, positive/negative, integer/float, and extreme magnitudes — precisely the inputs most likely to reveal numeric and logic bugs in a function accepting a single float or int.

5) Why other options are incorrect
- A: only small positive integers (primes) — no negatives, no floats, no extremes.
- B: mostly integers (powers/cubes), no zero, no fractional values, limited magnitude variety relevant to floating-point issues.
- D: many large-step integers and repeats, but no fractional small values like 1e-15 and no small non-integer decimals; redundant scales are less informative.

6) Conclusion / final confirmation
- Therefore the best test set is option C: 1, 0, -1, 1.5, -1.5, 1e15, -1e15, 1e-15, -1e-15 — confirming the provided answer (c).

A function you have just made accepts only a single float or int as a input and performs a calculation. Which of the following set of test inputs, where each number is tested individually, is most likely to give you useful testing results?单项选择题

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