What type of check is shown above?

Question

BlackTom AI · Accepted Answer

A range check verifies that a numeric value lies within an acceptable interval (e.g., 0–24 for hours), so this is a range check.

1. Relevant concepts:
- Range check: tests whether a numeric input falls inside allowed minimum/maximum limits.
- Format check: tests whether input matches a pattern (e.g., "DD/MM/YYYY" or "HH:MM").
- Data type check: ensures the input is the correct type (e.g., integer, float).
- Presence check: ensures a value has been entered (not blank).

2. Step‑by‑step reasoning from the pseudocode in the diagram:
- Step 1: Input Hours.
- Step 2: Evaluate the condition If Hours > 24 Then.
- Step 3: If true, Print "Hours is too high – please re‑enter".
- Step 4: End If / End program.

3. Intermediate logical steps shown explicitly:
- The program reads a numeric value (Hours).
- It compares that value to the upper bound 24.
- If the value exceeds the allowed bound, an error message prompts re‑entry.

4. Why this is a range check:
- The code compares the numeric input against a numeric limit (24). That is exactly what a range check does — it enforces that a value must lie within a permitted range. Even though only the upper limit is shown, checking > 24 is still checking whether the value is within the valid range of hours (commonly 0–24).

5. Why the other options are incorrect:
- Format check: would validate the structure or pattern of the input (e.g., colon-separated time), not whether it is > 24.
- Data type check: would verify the input is numeric (e.g., integer), not whether it falls within a specific numeric bound.
- Presence check: would test that something was entered at all (not blank), not the value’s magnitude.

Conclusion: The code performs a numeric limit verification (range check). Therefore the correct choice is a. Range check.

What type of check is shown above?单项选择题

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