Free Practice Questions for ServiceNow CAD Exam

Inherited fields in ServiceNow are fields that are part of a parent table and automatically become part of child tables through inheritance. This structure is foundational in the ServiceNow data model, ensuring that child tables maintain a consistent relationship with their parent tables.

Here’s why inherited fields cannot be deleted from a child table:

System Design:ServiceNow employs a table inheritance model where child tables derive fields and properties from parent tables. Deleting inherited fields from a child table would break the integrity of the data model, as those fields are shared across multiple tables.

Impact on Functionality:Many inherited fields, such as sys_created_on or sys_updated_by, are integral to the functionality of the platform. Removing them could disrupt workflows, reporting, and auditing capabilities.

Alternative Approach:If you want to hide or restrict access to inherited fields in a child table, you can use ACLs (Access Control Lists) to prevent users from viewing or modifying these fields. Another option is to use UI Policies or Client Scripts to control their visibility on forms.

Developer Note:Attempting to delete inherited fields violates ServiceNow’s core principles of maintaining a robust and unified data structure. The platform enforces these rules to ensure consistent behavior across all tables in the hierarchy.

ServiceNow Developer Documentation on Table Inheritance​.

Best practices outlined on SN Pro Tips regarding scoped application development and table structures​.

Recurring checks, like finding task records that are unassigned, are implemented using platform automation that runs on a schedule. ServiceNow provides two common development-aligned places for this type of logic. Scheduled Script Execution is a scheduled job mechanism that runs server-side scripts at defined intervals. Developers use it to query tables (such as Task) and take actions like updating fields, creating follow-up records, or sending notifications when conditions are met. This matches option C. For low-code automation, Flow Designer also supports scheduled triggers, allowing developers to run a flow at specific times or on a repeating schedule to perform checks and actions. This matches option A (Scheduled Flows). Discovery Schedules are specific to the Discovery feature set for scanning infrastructure and are not used for general task management checks. “System Schedules” is not the standard construct where custom recurring business logic is authored for application development; the platform’s scheduled logic is typically implemented through scheduled jobs (including script executions) and scheduled flow triggers.

ServiceNow Studio is used to develop and manage application artifacts within a scoped application, including server-side logic that runs when database operations occur. “Customizing system behavior through database actions” points directly to server-side automation triggered by record operations such as insert, update, delete, and query. The platform feature designed for that purpose is Business Rules, which execute on the server in response to database events and can validate data, set field values, enforce policies, or initiate additional processing. While Studio can also include other file types such as Client Scripts, UI Policies, and ACLs, those are not primarily described as “database actions.” Client Scripts and UI Policies are primarily UI and client behavior controls, and ACLs control security access. Business Rules are the canonical mechanism for database-triggered behavior and are the best match to the question’s wording. Therefore, the file type aligned to customizing system behavior through database actions is Business Rules (sys_script).

Application Access is a feature that allows you to control the access level of other application scopes to your application’s data tables. You can use Application Access to control the following database operations:

Create: This operation allows the user to create new records on the table. You can enable or disable this operation by selecting or clearing the Can create option.

Delete: This operation allows the user to delete existing records on the table. You can enable or disable this operation by selecting or clearing the Can delete option.

Read: This operation allows the user to view the records on the table. You can enable or disable this operation by selecting or clearing the Can read option.

Write: This operation allows the user to modify the records on the table. You can enable or disable this operation by selecting or clearing the Can write option.

The one database operation that cannot be controlled with Application Access is Query. Query is not an operation, but a method of the GlideRecord class that is used to retrieve records from the database on the server-side. Query is not part of the Application Access rules, but it is affected by the Access Controls and the user’s roles.

In ServiceNow, the Application Picker is a user interface element that allows developers to select the active application they are working on. The selected application determines the Application Scope, which defines the boundaries within which application artifacts (like tables, scripts, and UI components) reside and operate.

A. Selecting Global in the Application Picker sets the Application Scope to Incident: This is incorrect. Selecting "Global" sets the scope to the global application, not specifically to the Incident application.

B. Global is a reserved application that does not appear in the Application Picker: This is incorrect. The "Global" application is available in the Application Picker and represents the global scope.

C. Selecting an application from the Application Picker sets the Application Scope: This is correct. Choosing an application from the Application Picker establishes that application's scope as the current context for development and configuration.

D. Selecting an application from the Application Picker does not set the Application Scope: This is incorrect. The Application Picker directly influences the current Application Scope.

For more information, refer to the official ServiceNow documentation on Application Scope.

For a visual demonstration of restricting access to your ServiceNow application, you may find the following video helpful:

Restricting Access to your ServiceNow App

https://developer.servicenow.com/dev.do#!/learn/learning-plans/rome/new_to_servicenow/app_store_learnv2_scripting_rome_debugging_client_scripts

The following are debugging strategies for client-side scripts, which run in the web browser and manipulate the user interface:

g_form.addInfoMessage(). This is a client-side API that displays an information message at the top of the form.

Field Watcher. This is a debugging tool that displays the current and previous values of one or more fields on a form.

jslog(). This is a client-side API that writes a message to the browser console.

The following is not a debugging strategy for client-side scripts, but for server-side scripts, which run on the ServiceNow platform and manipulate the database:

gs.log(). This is a server-side API that writes a message to the system log. References: Client-Side Scripting APIs, Debugging Client Scripts