CLAD Software Development Best Practices 5

Question 1

What LabVIEW best practice ensures that resources like file references and DAQmx tasks are always properly closed?

Accepted Answer

Placing close/stop calls inside the error handler and in the normal exit path, or using 'Close' in a finally-style structure

Answer

Resources must be explicitly closed on both the normal and error paths; LabVIEW does not automatically release references when a VI stops.

Question 2

Which approach best supports unit testing of LabVIEW subVIs?

Accepted Answer

Using the NI Unit Test Framework to create test cases that call individual subVIs with known inputs

Answer

The NI Unit Test Framework enables automated, isolated testing of individual subVIs, making bugs easier to locate.

Question 3

When should you use LabVIEW's 'Disable Structure' during development?

Accepted Answer

To temporarily exclude code from execution without deleting it, useful for debugging

Answer

A Disable Structure lets you exclude code from compilation temporarily while keeping it on the diagram for later re-enabling.

Question 4

What is the recommended way to share data between iterations of a loop in LabVIEW?

Accepted Answer

Shift registers on the loop structure

Answer

Shift registers are the idiomatic LabVIEW mechanism for carrying values from one loop iteration to the next.

Question 5

Which LabVIEW practice improves front panel usability for end users?

Accepted Answer

Grouping related controls visually, adding clear labels, and using appropriate control styles for the data type

Answer

Organizing controls logically, labeling them clearly, and matching control style to data type reduces user errors and training time.

CLAD Practice Test