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You are testing a dictionary lookup mobile application. When the user enters a word, the definition of that
word is returned. This application will run on iOS and Android, on the latest versions
of the devices and the operating systems, plus all devices and operating system released in the last three years.
The target users are university students.
Which of the following is a test condition that can be used to verify the user error protection quality
sub-characteristic?

The Acme Elevator company uses state-transition diagrams to document the behavior of their elevator doors.
The following text is taken from one of their requirements documents. Convert it into the equivalent
state-transition diagram:
When the doors are open, the close command starts the doors closing.
When the doors are closing, the closed sensor indicates that the doors are fully closed.
When the doors are closed, the open command starts the doors opening.
When the doors are opening, the open sensor indicates that the doors are fully open.
If the doors are closing, the open command will start the doors opening.
If the doors are opening, the close command will start the doors closing.
Which state transition diagram most closely represents Acme's elevator door rules?
Ideally, which environments should be targeted by interoperability testing?
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