Multiple choice technology testing

3 One of the fields on a form contains a text box which accepts numeric values in the range of 18 to 25. Identify the invalid Equivalence class

  1. 17

  2. 19

  3. 24

  4. 21
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A Correct answer
Explanation

The valid range is 18-25 inclusive. An invalid equivalence class includes values outside this range. Option A (17) is below the valid range, making it invalid. Options B, C, D are all within the valid range (19, 24, 21).

AI explanation

The valid range is 18 to 25 inclusive, so any value from 18 through 25 falls in the valid equivalence class. 17 lies just below the lower boundary, placing it in the invalid (too-low) equivalence class, while 19, 21, and 24 are all within the valid range.

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