Integration with External Systems 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 Integration with External Systems flashcards as text
What TestStand feature enables an operator interface application to receive notifications when a test execution reaches a specific sequence step?
Answer: The TestStand API Callback object registered for ExecutionStateChanged
Operator interface applications use the TestStand API's event callbacks (such as ExecutionStateChanged) to receive asynchronous notifications about execution progress.
In a TestStand multi-process execution environment, how does the controller process communicate test results back to the supervisor process?
Answer: Through the TestStand Distributed System Manager using TCP/IP
TestStand's Distributed System Manager coordinates multi-process test execution and result aggregation over TCP/IP between supervisor and controller stations.
Which method is recommended for integrating a legacy 32-bit DLL into a 64-bit TestStand installation?
Answer: Use TestStand's out-of-process adapter to call the 32-bit DLL from a 32-bit server process
The out-of-process (OOP) adapter launches a 32-bit server process that hosts the legacy DLL, allowing 64-bit TestStand to communicate with it via IPC.
When configuring TestStand to log results to an external LIMS (Laboratory Information Management System), which integration approach minimizes coupling?
Answer: Using a post-execution callback that sends results via a message queue or REST API
A post-execution callback that publishes results to a message queue or REST endpoint decouples the test sequence from LIMS-specific implementation details.
What TestStand step type allows a sequence to wait for an external application to signal readiness before proceeding?
Answer: Synchronization > Wait on Semaphore, released by the external app via the TestStand API
A named Semaphore in TestStand can be released programmatically by an external application via the TestStand API, cleanly signaling the waiting sequence to continue.
In TestStand's ActiveX adapter, what is the consequence of calling a method on an apartment-threaded COM object from a non-STA TestStand worker thread?
Answer: COM marshals the call to the STA thread, potentially causing deadlock if the STA is blocked
Calling an STA COM object from a non-STA thread forces COM cross-apartment marshaling; if the STA thread is blocked waiting on the worker, a deadlock occurs.
Which TestStand configuration option controls whether instrument VISA resource names are stored in the sequence file or in a separate station-specific configuration file?
Answer: The IVI session configuration in MAX (NI Measurement & Automation Explorer)
IVI logical names configured in NI-MAX map to physical VISA resource strings, allowing the sequence to reference logical names while the actual resource is station-specific.