Sequence Development & Customization Flashcards
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Read the first 7 Sequence Development & Customization flashcards as text
Which TestStand feature allows you to define a custom execution flow by overriding the default behavior of the Sequential process model?
Answer: Station Callback sequences
Station Callback sequences let you override default process model behavior at specific execution hooks without modifying the process model itself.
In TestStand, what is the primary purpose of the 'Cleanup' subsequence within a sequence?
Answer: To execute steps that must run regardless of pass/fail outcome
The Cleanup subsequence always executes after the Main Body and Post-Expression, ensuring resources are released even if an error occurred.
When using a Template sequence in TestStand, what is the key advantage over copying an existing sequence?
Answer: Changes to the template automatically propagate to all sequences based on it
Template sequences enable inheritance so that modifications to the base template are reflected in all derived sequences, reducing maintenance overhead.
A developer wants to pass a large data array between two separate sequence files without using global variables. What is the recommended approach?
Answer: Pass the array as a parameter in the subsequence call step
Passing data as parameters in subsequence call steps keeps data encapsulated and avoids the side effects of shared globals.
Which locals scope in TestStand is accessible only within the currently executing sequence and is destroyed when the sequence exits?
Answer: Locals
Locals are sequence-scoped variables that exist only for the lifetime of that sequence's execution.
What happens when a TestStand step's 'Run Mode' is set to 'Skip'?
Answer: The step is not executed and its status is set to Skipped
Setting Run Mode to Skip causes TestStand to bypass that step entirely, recording it with a Skipped status in the report.
In a TestStand sequence, which expression context is evaluated AFTER the step's code module executes?
Answer: Post-Expression
The Post-Expression is evaluated after the code module runs, commonly used to check results or set flags based on step output.