Labview 3 test

Question 1

Name three simple design patterns

Answer 1

• Can perform calculations and make measurements
• Does not require a specific start or stop action
• Can convert simple VIs into subVIs

Question 2

Name four types of simple design patterns

Answer 2

• Simple VI pattern
• General VI pattern
• State Machine
• Event-based state machine

Question 3

Define the producer/consumer design pattern

Answer 3

It separates tasks that produce and consume data at different rates. Used to acquire multiple sets of data that must be processed in order

Question 4

Define the functional global variable

Answer 4

A non-reentrant VI that uses uninitialized shift register to hold global data

Question 5

Design Pattern order

Answer 5

• State machine
• Functional global variable
• Simple
• General
• Producer/ consumer
• State Machine and Consumer

Question 6

General design pattern

Answer 6

Use: subroutine in other programming languages
Advantage: modular applications
Disadvantage: not suitable for user-interface design

Question 7

Producer/ Consumer Data

Answer 7

Use: analyzes data in parallel with other analysis
Advantage: buffered communication between apps
Disadvantage: no loop synchronization

Question 8

Producer/Consumer Events

Answer 8

Use: responds to user interface with intense-apps
Advantage: separated user interface from intensive code
Disadvantage: does not integrate non-user interface

Question 9

Simple Error Handler VI (?!)

Answer 9

Displays a dialog box with error information

Question 10

General Error Handler VI (?!+)

Answer 10

Same functionality as the Simple Error Handler VI, except it allows you to custom errors

Question 11

State Machine Error Handler

Answer 11

Transitions the state machine to an error or shutdown state when an error occurs

Question 12

Error Ring

Answer 12

idk lol

Question 13

Define software control timing

Answer 13

Code that involves timing a real-world operation to perform within a set time period or controls the frequency at which a loop executes

Question 14

List two reasons to use multiple loop patterns

Answer 14

• Execute multiple tasks concurrently

- Execute tasks at different rates

Question 15

List two reasons to use multiple loop patterns

Answer 15

• Execute multiple tasks concurrently

- Execute tasks at different rates

Question 16

List two examples of error handling code

Answer 16

• Displays a dialog box when an error occurs

- Transitions a state machine to a shutdown state