CTA Process Models & Execution Flashcards
6 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 6 CTA Process Models & Execution flashcards as text
What is the correct way to share a hardware resource (e.g., a DMM) between multiple test sockets in a Batch process model without conflicts?
Answer: Use a Semaphore to serialize access to the shared resource
A Semaphore with a count of 1 enforces mutual exclusion, ensuring only one test socket accesses the shared DMM at a time.
Which TestStand execution entry point allows a developer to run a single step in isolation for debugging without running the full sequence?
Answer: Run Selected Steps
The 'Run Selected Steps' feature in the TestStand sequence editor executes only the highlighted steps, isolating them for rapid debugging.
A process model must skip all remaining tests if the board power supply fails. Which TestStand flow control action achieves this most cleanly?
Answer: Use the 'Terminate Execution' step to end the run
The 'Terminate Execution' action immediately stops the current execution and invokes cleanup callbacks, which is the recommended way to abort on critical failure.
In TestStand, what is a 'Station Model Callback' and when would a CTA architect create one?
Answer: A customizable hook in the process model called at defined execution events
Station Model Callbacks are named hooks in the process model invoked at specific events (e.g., PreUUT, PostUUT), allowing architects to inject custom logic without altering core sequences.
Which TestStand object represents the currently executing sequence's runtime state, providing access to result data and local variables?
Answer: SequenceContext
The SequenceContext object is passed to every step adapter and sequence call, encapsulating the full runtime state including locals, parameters, and result data.
A CTA architect needs to implement a 'golden unit' calibration run before every batch. Where in the process model should this be inserted?
Answer: In the PreBatch callback before test sockets start
The PreBatch callback executes once before any UUT is tested, making it the correct and non-intrusive location for golden-unit calibration runs.