ACA User Interface & UX Design 2 — Questions and Answers
Question 1: Which Appian design pattern should be used when an interface needs to load data only after a user interaction, such as a button click?
- Use a!refreshVariable() with refreshOnVarChange triggered by a local variable the button updates (Correct answer)
- Use a!loadData() function inside the button's saveInto
- Configure the interface to use lazy loading mode in settings
- Use a background process model to preload data before the UI renders
Correct answer: Use a!refreshVariable() with refreshOnVarChange triggered by a local variable the button updates
By linking a!refreshVariable() to a local variable that the button modifies, the interface can defer a data load until triggered by user action.
Question 2: What does the 'readOnly' property on an Appian input field do?
- Displays the field value without allowing user edits (Correct answer)
- Hides the field from all users
- Disables the field but still shows validation errors
- Locks the field value in the database
Correct answer: Displays the field value without allowing user edits
Setting readOnly to true renders an input field as display-only text, preventing user modification while still showing the current value.
Question 3: In Appian, which component is best suited for allowing users to upload files as part of a process task?
- a!fileUploadField() (Correct answer)
- a!textField() with file path input
- a!documentField()
- a!linkField() pointing to a file server
Correct answer: a!fileUploadField()
a!fileUploadField() provides a native file upload control in Appian interfaces, storing uploaded files in Appian's document management system.
Question 4: What is the advantage of using 'a!gridField()' over 'a!listLayout()' for displaying tabular data in Appian?
- a!gridField() supports sortable columns, pagination, and row selection for interactive data grids (Correct answer)
- a!gridField() uses less memory because it caches data client-side
- a!listLayout() can only display text while a!gridField() supports all data types
- They are interchangeable and have no functional differences
Correct answer: a!gridField() supports sortable columns, pagination, and row selection for interactive data grids
a!gridField() is a feature-rich grid component with built-in sort, pagination, and selection capabilities suitable for interactive tabular data.
Question 5: Which Appian expression function returns the currently logged-in user's username?
- loggedInUser() (Correct answer)
- currentUser()
- a!getUser()
- getUserName()
Correct answer: loggedInUser()
loggedInUser() returns the username of the currently authenticated user, commonly used for personalization and security checks in interfaces.
Question 6: In Appian, what is the purpose of using 'a!save()' inside a button's 'saveInto' parameter?
- To update a local variable or process variable with a new value when the button is clicked (Correct answer)
- To commit interface changes to the database immediately
- To save the entire interface definition to Appian Designer
- To store the button click event in the audit log
Correct answer: To update a local variable or process variable with a new value when the button is clicked
a!save() targets a specific variable (local or process) and assigns it a new value when the associated button or link is clicked.
ACA User Interface & UX Design 2
Which Appian design pattern should be used when an interface needs to load data only after a user interaction, such as a button click?