Sequence Development & Customization Flashcards
7 cards from real CTA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Sequence Development & Customization flashcards as text
When customizing a TestStand process model, which file should be modified to add a new station-level report header without breaking future process model upgrades?
Answer: A Station Callback sequence file that overrides the Report Header callback
Overriding the Report Header callback in a Station Callback file isolates customizations from the core process model, surviving upgrades.
A TestStand sequence needs to call a LabVIEW VI that runs asynchronously and fires an event when complete. Which step type best handles this pattern?
Answer: Asynchronous Sequence Call with thread synchronization using a Rendezvous
An asynchronous sequence call combined with a Rendezvous synchronization step allows the VI to run on a separate thread while the main sequence waits for completion.
In TestStand, what is the purpose of the 'Number of Retries' property on a step?
Answer: Automatically re-executes a failed step a specified number of times
The Number of Retries property causes TestStand to automatically re-run a step that fails, up to the specified retry count.
Which TestStand sequence property controls whether a sequence's parameters and locals are visible to external callers for data-passing purposes?
Answer: Public Interface definition
The Public Interface definition of a sequence specifies which parameters and locals are exposed to callers for data exchange.
A test engineer notices that a custom step type is not appearing in the TestStand Insertion Palette. What is the most likely cause?
Answer: The step type file has not been added to the TestStand search path
TestStand only loads step type files located in directories on its configured search path; adding the file to a known path makes it discoverable.
What is the role of the 'Setup' subsequence in a TestStand sequence?
Answer: It executes before the Main Body to initialize resources or state
The Setup subsequence runs before the Main Body and is used to prepare resources, initialize variables, or establish hardware connections.
When a TestStand sequence is called with 'Copy Parameters on Call' enabled, what is the behavior?
Answer: A copy of the caller's data is passed; changes in the called sequence do not affect the caller
Copy Parameters on Call passes a copy of the data, so mutations inside the called sequence are isolated from the caller's variables.