SNOW-CAD User Interface Development — 10 Questions

Question 1

A developer is asked to add a custom button to the Service Portal form for the 'incident' table. The button should trigger a client script that displays a confirmation dialog before submitting the form. Which approach should the developer use?

Accepted Answer

Create a UI Policy on the incident table with a client script that shows the button conditionally.. Option A is correct because UI Policies in Service Portal allow you to define client-side conditions and scripts that can dynamically show or hide UI elements like buttons. By creating a UI Policy on the incident table with a client script, you can conditionally display a custom button that triggers a confirmation dialog before form submission, leveraging the client-side execution context without server round-trips.

Answer

Create an Access Control Rule (ACL) on the incident table and attach a client script.

Answer

Create a Business Rule on the incident table that injects a button via server-side code.

Answer

Create a UI Action on the incident table with a client script and set the 'Show insert' condition.

Question 2

A Service Portal widget is failing to update a reference field on a form after a user selects a value from a reference picker. The developer reviews the widget's client controller and sees the following code snippet: $scope.c.data.selectedItem = value; The server script expects 'selectedItem' to be a sys_id string, but it is receiving an object. What is the most likely cause?

Accepted Answer

The reference field returns an object with 'value' and 'display' properties; the code should extract the sys_id.. Option D is correct because when a reference picker returns a value in Service Portal, it typically provides an object containing both the display value and the sys_id (e.g., {value: 'sys_id', display: 'name'}). The client controller code assigns this entire object to $scope.c.data.selectedItem, but the server script expects a plain sys_id string. The developer must extract the sys_id property (e.g., value.sys_id or value.value) before assigning it to the scope variable.

Answer

The server script expects the parameter in a different scope variable, like $scope.c.data.item.

Answer

The $scope.c.data assignment is incorrect; it should be $scope.data.

Answer

The client controller is not allowed to set $scope.c variables.

Question 3

When configuring a Service Portal page, a developer wants to ensure that a specific widget appears only to users with the 'itil' role. Which approach should be used?

Accepted Answer

Set the 'Roles' property on the widget instance within the page designer.. Option C is correct because the 'Roles' property on a widget instance within the Service Portal page designer directly controls which roles can view that specific widget. This is the intended declarative approach for role-based visibility at the widget instance level, without requiring custom scripting or ACLs.

Answer

Pass a role check from the server script to the client controller via widget options.

Answer

Write an Access Control Rule (ACL) on the widget's table to restrict access.

Answer

Create a UI Policy on the portal table that hides the widget based on user roles.

Question 4

A developer is designing a custom form in the standard UI (UI16) and needs to add a message that displays only when the 'state' field is 'Closed'. Which feature should be used to achieve this without custom scripting?

Accepted Answer

Create a UI Policy that adds a message when the condition state=Closed is true.. UI Policies are the correct declarative feature in UI16 to show a message based on a field value without custom scripting. They run on the client side and can display informational, warning, or error messages when a specified condition (like state=Closed) is met, making option A the appropriate choice.

Answer

Create a form section and set its condition via the 'Conditional' property.

Answer

Write a Client Script that shows a message when state changes to Closed.

Answer

Use a UI Macro with a condition that checks the state field.

Question 5

A Service Portal widget is not updating data on the page after the user clicks a button that calls a server-side function. The client controller uses $scope.server.get() to call the server. The server script updates a global variable in glideRecord and returns it. However, the widget view does not reflect the change. What is the most likely issue?

Accepted Answer

The client controller is not handling the promise returned by $scope.server.get(); the scope update should be inside the success callback.. Option C is correct because `$scope.server.get()` returns a promise, and the scope variables must be updated inside the `.then()` success callback to ensure the changes are applied after the asynchronous server response is received. Without handling the promise, the client controller executes the next line immediately, and the scope update happens before the server data is available, so the widget view never reflects the change.

Answer

The widget template is not bound to the correct scope variable.

Answer

The client controller should use $scope.server.update() instead of $scope.server.get().

Answer

The server script is not allowed to modify data from a widget server script.

Question 6

Which TWO of the following are valid ways to customize the Service Portal login page?

Accepted Answer

Override the 'Login' page in the portal record by creating a new page and setting it as the login page.. Option B is correct because the Service Portal login page can be customized by overriding the 'Login' page in the portal record. This is done by creating a new page (e.g., a copy of the default login page) and setting it as the login page in the portal's configuration, which allows full control over the layout and widgets used. Option D is correct because CSS variables defined in the portal's theme (SCSS) can be used to style login page elements, as the theme's SCSS is compiled and applied globally to all portal pages, including the login page.

Answer

Create a new widget instance on the 'loginpage' widget slot.

Answer

Add a widget option to the login widget to inject custom CSS.

Answer

Set the 'login.css' property in sys_properties to a custom stylesheet URL.

Question 7

Which THREE of the following are correct statements about Service Portal client controllers?

Accepted Answer

They can use AngularJS services like $http and $timeout.. Option A is correct because Service Portal client controllers are AngularJS controllers that run in the browser. They can use standard AngularJS services such as $http for making AJAX calls to external APIs or the instance, and $timeout for delaying execution, which are both injected as dependencies.

Answer

They run on the server and are called via server-side includes.

Answer

They must define a $scope variable explicitly to bind data to the template.

Question 8

A developer runs this widget server script and expects data.count to be the number of active incidents. However, the widget displays 'undefined' for data.count. What is the most likely cause?

Accepted Answer

The script is missing the function parameters (options, data) that provide the data object.. In ServiceNow widget server scripts, the function signature must include the parameters (options, data) to access the data object that is passed to the client script. Without these parameters, the data variable is undefined, causing data.count to display 'undefined'. The script likely defines the function without parameters or with incorrect ones, so the data object is not available.

Answer

The addQuery method syntax is incorrect; it should use a condition string.

Answer

The while loop uses next(); it should use hasNext() instead.

Answer

GlideRecord requires an initialize() call before query.

Question 9

This client script is attached to the 'category' field on the incident form. When the user changes the category to 'Network', what happens to the short_description field?

Accepted Answer

The short_description is set to 'Category changed to Network'.. Option B is correct because the client script checks if the newValue of the 'category' field is not empty and equals 'Network'. When the user changes the category to 'Network', newValue is 'Network', which passes the empty check (newValue !== ''), and then the condition newValue === 'Network' is true. The script then executes g_form.setValue('short_description', 'Category changed to Network'), which sets the short_description field to that string.

Answer

Nothing happens because newValue equals 'Network' which passes the empty check.

Answer

An error occurs because setValue cannot be called with a string.

Answer

The short_description is cleared.

Question 10

A company has a Service Portal that includes a custom widget for submitting hardware requests. The widget has a client controller that calls a server script to create a new record in the 'hardware_request' table. Recently, users have reported that when they click the 'Submit' button, the widget sometimes does not show a success message, and the record is not created. The developer reviews the server script, which uses gs.log to log errors, and sees no errors in the logs. The client controller uses $scope.server.get() to call the server. The widget template uses ng-show='data.success' to display a success message. Based on this scenario, what is the most likely cause of the intermittent issue?

Accepted Answer

The client controller does not handle the asynchronous response properly; the success message depends on the promise resolving before the user might navigate away or click again.. The client controller uses $scope.server.get() to make an asynchronous call to the server script. If the user clicks 'Submit' and then navigates away or clicks again before the promise resolves, the success message (ng-show='data.success') may never display because the $scope.data object is not updated in time. The server script logs no errors because it executes correctly, but the client-side asynchronous handling fails to capture the response, leading to the intermittent issue.

Answer

The server script fails due to a mandatory field not being provided, but the error is not logged.

Answer

The server script uses data.success = true; but the client controller does not read it.

Answer

The widget has a Client Script that conflicts with the server script.