CLAD CLAD User Interface & Event Handling 2

Question 1

What is a Property Node used for in LabVIEW?

Accepted Answer

Reading or writing properties of front panel objects and VI settings programmatically

Answer

Storing global variables

Answer

Defining data type properties

Answer

Accessing operating system properties

Question 2

How do you dynamically change the label text of a LabVIEW control at runtime?

Accepted Answer

Use a property node targeting the control's Caption.Text property

Answer

Use a local variable

Answer

Change it in the block diagram directly

Answer

Use the VI Server to rename it

Question 3

What does the 'Value' property of a control accessed via a Property Node do?

Accepted Answer

Reads or writes the control's current value without triggering a Value Change event

Answer

Returns the data type of the control

Answer

Triggers the Value Change event

Answer

Resets the control to its default value

Question 4

Which LabVIEW mechanism allows a subVI to communicate back to its caller's front panel controls without using global variables?

Accepted Answer

VI Server reference and property nodes

Answer

Functional Global Variable

Answer

Notifiers

Answer

Queue

Question 5

What is the recommended way to update a front panel indicator from a parallel loop in LabVIEW?

Accepted Answer

Use a Queue or Notifier to pass data between loops

Answer

Use a global variable

Answer

Use a local variable

Answer

Write directly to the indicator wire

Question 6

What is the purpose of the 'Invoke Node' in LabVIEW?

Accepted Answer

It calls methods on objects or VI references, such as running a VI programmatically

Answer

It invokes a mathematical function

Answer

It starts a new process

Answer

It invokes hardware drivers