MDA 3

Which of the following is the best method to update an indicator on the front panel?

Use a Value property node

Wire directly to the indicator terminal

Use a local variable

Use a functional global variable

While the VI executes, the user presses and then releases Boolean Control with Switch Until Released mechanical action. Assuming that the starting value of Boolean Control is FALSE, what value does the Result indicator display after execution?

Which of the following methods will create an XY Graph with two plots?

Create a single cluster from two arrays of X values and two arrays of Y values in an X,Y, X,Y pattern.

Bundle the X and Y array pairs together into two clusters and then create an array of these two clusters.

Bundle the X and Y array pairs together into two clusters and create a cluster of these two clusters.

Create a single array of each of the X arrays and Y arrays in an X,Y,X,Y pattern.

Why is LabVIEW a data flow programming language?

It uses icons instead of text to create applications

The flow of data through nodes on the block diagram determines execution

It does not have a Goto function to control execution

The memory location in which data is stored changes each iteration

What VI is typically used to terminate an Error Cluster wire and to display any error message?

Merge Errors

One Button Dialog/Two Button Dialog

Generate Front Panel Activity

Simple Error Handler

You have a control on the front panel of a VI and you need to modify one of its properties at run time. Which of the following is the best approach you would take?

Create an implicit property node and select the property to modify

Create a control reference, pass the reference to a property node and select the property to modify

Create a linked shared variable and select the property to modify the property

Create a local variable and select the property to modify

For the VI shown in the following block diagram, automatic error handling is enabled. If the file C:\data.txt does not exist, will an error dialog box pop up?

Yes, each time the error from the Open/Create/Replace File function is returned

Yes, each time a loop iteration completes

Yes, but only once, not on each iteration of the loop

If an input name on the Show Context Help window is in bold for a SubVI, which of the following conditions are true? (Multiple answers may apply)

Input values must be scalar.

An input is recommended, but not required

An input is required.

A broken run arrow will result unless the input is wired.

In the figure below, the output of Array Size is

1D Array of {2, 3Î

1D Array of {3, 2}

None of the above

Which setting assigns specific keys or key combinations to a front panel control?

Key Focus

Key Navigation

Radix

Distribute Objects

What is the result in new string after the following code has executed?

Hello to you!

Hello Wto you!

Hello to you!!

Helloto you!

What functionality do Control References provide?

Ability to add controls and indicators to a VI programmatically

Access to the properties of Front Panel objects in SubVIs

Control of multiple DAQ inputs through alias names

Ability to wire from controls to functions and SubVIs

What value does the Numeric indicator display after this code executes?

The While Loop iterates indefinitely

You develop a SubVI that only outputs a value and need to use this SubVI in a (calling) VI. Which of the following is the best way to enforce dataflow to control the execution of the SubVI?

Use the SubVI in a Sequence structure

Modify the SubVI to have dummy inputs that can be used from the calling VI

Modify the SubVI to have Error clusters that can be used from the calling VI

Modify the SubVI to have a global variable and use it from the calling VI

Which of the following illustrates an advantage of a global variable over a local variable?

A global variable can pass data between two independent VIs running simultaneously

Only the global variable can pass array data, local variables cannot

Global variables follow the dataflow model, and therefore cannot cause race conditions

Global variables do not require owned labels to operate

Which plot will change color first?

Plot 1 because properties are executed top-down

Plot 0 because properties are implemented in numeric order starting at zero

Both plots will be updated simultaneously due to the multithreading of properties

It cannot be determined because LabVIEW performs operations in dataflow format

Which of the following will allow you to have multiple plots on a Waveform Graph?

Bundle two 1D arrays of X and Y data together for each plot. Then build an array of these clusters and wire it to the Waveform Graph indicator.

Build an 2D array of data with each plot in a separate row (or column) in the array, then wire the array to the Waveform Graph indicator.

Bundle the elements of each waveform into a cluster and build an array of these clusters, then wire the array to the Waveform Graph indicator

Both B. and C.

Which statement best describes a Notify event, such as the value change of a Boolean control?

Indication that an event occurred and LabVIEW did NOT process the event

Indication that an event occurred and was discarded by the user

Indication that an event occurred and LabVIEW processed the event

Indication that an event did NOT occur but specified Event timeout did occur

You customize a control, select Control from the Type Def. Status pull-down menu, and save the control as a .ctl file. You then use an instance of the custom control on your front panel window. If you open the .ctl file and modify the control, does the control on the front panel window change?

Yes

How long does this Dequeue Element function wait to receive data?

1 millisecond (default since unwired)

1 second (default since unwired)

Indefinitely

It does not wait, it returns immediately

What value does the Result F2 indicator display after the VI containing this Stacked Sequence structure executes?

Which of the following accurately describes the output that results from execution of the following loop?

The last three values from the Random Number function will be displayed.

A running average of all measurements will be displayed.

An average of the last four measurements will be displayed

None of the above

In what instance would you use the Probe tool rather than Highlight Execution?

To see the flow of data

To see the value of a wire in real-time

To look into a SubVI, as the process is running

To slowdown the VI and show data values in wires

This graphic displays all the cases of a single case statement. What value does the Result indicator display after the VI executes?

The following breakpoint does which of the following:

Causes the VI to abort

Causes the VI to pause

Causes the VI to single step over the addition

Causes the VI to single step over the indicator

What value is displayed in Result when the code executes?

A 1-D Array of {-25, 25, 50}

A 1-D Array of {-25, 25}

A 2-D Array of {{-25, -50, -50} , {50, 25, 25}}

A 1-D Array of {75, -50, 25}

Which mechanical action of a Boolean would you use to mimic a button on a Windows dialog?

Switch Until Released

Switch When Released

Latch Until Released

Latch When Released

Which is not an important part of creating a Functional Global Variable?

Using Shift Registers to store information

Changing the VI’s execution settings to Reentrant

Setting the VI to inline into calling VIs

Setting the While Loop to stop after one iteration

Which chart update mode should be used to compare old and new data separated by a vertical line? This chart will display similar to an electro-cardiogram (EKG)

Strip Chart

Scope Chart

Sweep Chart

Step Chart

The following block diagram represents which common type of VI architecture?

Multiple Case Structure VI

General VI

State Machine VI

Parallel Loop VI

The function of a Cluster is to:

Grouping of mixed data types into logical structures.

Present data on the Front Panel using charts or graphs.

Provide a means of differentiating between data types on the Block Diagram.

Separate data objects by data type on the Front Panel.

A coercion dot indicates that:

The data types are consistent

A polymorphic operation will be performed on the data

A data buffer is created to handle data conversion

Data values are being coerced because they are out of range

Which combination of words correctly completes the following statement? Unlike _____ Property Nodes, _____ Property Nodes require _____ as inputs in order to function correctly.

Explicit; Implicit; Data Value References

Implicit; Explicit; Data Value References

Explicit; Implicit; Control References

Implicit; Explicit; Control References

What is one disadvantage of using the State Machine VI architecture?

A State Machine can only traverse states in order

If two state changes occur at the same time, only the first state change will be handled and the second will be lost

The diagram becomes significantly larger when changing from a general architecture to a State Machine

State Machines cannot acquire data or use DAQ functions

Which combination of words correctly completes the following statement? The ______________ indicates the total number of times the loop will execute and the _______________ returns the number of times the loop has executed minus one

Count terminal, ; conditional terminal,

Conditional terminal, ; iteration terminal,

Count terminal, ; iteration terminal

Conditional terminal, ; count terminal,

Which statement best describes a LabVIEW Project (.lvproj) file?

A specialized folder that contains all files pertaining to an application

A file containing a front panel and block diagram where programming steps can be implemented

A compiled version of code mostly used for final deployment of an application

A file that contains references to, and provides organization for all files pertaining to an application

Which of the following statements regarding Array constants are NOT true:

When you create an Array constant on the block diagram, it is not visible on the Front Panel.

You cannot resize an Array constant to include more than one element.

You can copy or drag an existing Array on the Front Panel to the Block Diagram to create a constant of the same data type

All array operations can be performed on an Array constant

What is the result in Array after the following code has executed?

A 1-D array of {1, 4, 3, 2, 1, 0}

A1-D array of {1, 8, 0, 1, 2, 3, 4, 6, 2}

A 1-D array of {1, 4, 3, 2, 1, 0, 8, 6, 2}

A 1-D array of {1, 8, 0, 1, 2, 2, 9}

Which of the following display options are available for strings on the Front Panel?

�\’ Codes

Password

Hex

All of the above

What is the result of the following Array subtraction?

A 1-D Array of {-25, 25, 50}

A 1-D Array of {-25, 25}

A 2-D Array of {{-25, -50, -50} , {50, 25, 25}}

A 1-D Array of {75, -50, 25}

Which of the following allows you to plot any set of points, evenly distributed or not?

Waveform Graph

Waveform Chart

XY Graph

Both A. and C.

Which of the following methods is NOT a method to create a 1-D Array:

Place an Array Shell on the Front Panel and drag a Control into the shell.

Use a While Loop with auto-indexing disabled

Use a For Loop with auto-indexing enabled.

Use the Initialize Array function.

Which of the following accurately describes the output that results from execution of the following loop?

The last three values from the DAQ Assistant will be displayed.

A running average of all measurements will be displayed

An average of the last four measurements will be displayed

None of the above

Which of the following statements is true?

The default setting for a tunnel into or out of a For Loop has auto-indexing enabled if the data being passed is an array.

The default setting for a tunnel into or out of a While Loop has auto-indexing disabled if the data being passed is an array

Both A. and B. Are true

None of the above

Which of the following statements is true regarding the use of Coercion Dots?

Coercion Dots improve program performance.

Coercion Dots represent a conversion from one data type to another.

Coercion Dots increases memory usage

Both A. and B.

Both B. and C.

Which combination of words correctly completes the following statement? Unlike __________, which display only the most recent array of values written to them, ___________ update periodically and maintain a history of the past data.

Graphs; charts

Charts; plots

Plots; graphs

Charts; graphs

Which of the following is NOT a traditional debugging feature used to help find errors in a VI:

Highlight Execution.

Single Stepping

Breakpoints

Stop Values

MDA 3

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