Part 1 "Test Techniques various" Consider the following fault attack: "Force all possible incoming errors from the software/OS interfaces to the application". Which of the following is the kind of…

Question

Options

• AApplication crashes when unsupported characters are pasted into an input field using the
• BFront page of the application has incorrect spelling of the company name
• CApplication fails to display financial numbers in the correct currency format in reports
• DApplication miscalculates total monthly balance due on credit cards

• A
  90% (47)
• B
  2% (1)
• C
  6% (3)
• D
  2% (1)

Explanation

Option A is correct because the fault attack described targets error handling at system/OS interface boundaries - specifically, what happens when invalid or unexpected inputs flow in from those interfaces. Pasting unsupported characters into a field is exactly this scenario: the clipboard (an OS interface) delivers unexpected data, and the application crashing reveals a failure to handle errors from that interface gracefully.

Options B, C, and D are all functional defects, not fault-handling failures: incorrect spelling (B) is a content/QA defect, wrong currency format (C) is a localization/formatting defect, and miscalculated balance (D) is a business logic defect. None of these result from the application failing to cope with erroneous input injected from software or OS interfaces.

Memory tip: The key phrase is "errors from software/OS interfaces" - think crash-on-bad-input, not wrong-output-on-valid-input. If the application processes valid data and returns the wrong result, that's a functional bug. If it receives hostile/invalid data from an interface and falls over, that's what this fault attack is hunting.

No community discussion yet for this question.