A system specification states that a particular field should accept alphabetical characters in either upper or lower case. Which of the following test cases is from an INVALID equivalence partition?

Explanation: “F33ds”” is ‘invalid’; it doesn’t mean that it represents a value that cannot be entered by a user. It just means that it is not one of the expected inputs for that particular field. The software should correctly handle values from the invalid partition, by replying with an appropriate validation message such as ‘System only accepts alphabetical characters in either upper or lower case’ whereas this type of value or partition can be used as part of negative testing.”

  • A. fEEDs
  • B. Feeds
  • C. FEEDS
  • D. F33ds

Answer: Option D