ServiceNow Scripting

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

In a complex ServiceNow implementation employing a multi-stage approval workflow, how does the asynchronous business rule execution potentially impact real-time data consistency, particularly when considering concurrent updates initiated by UI actions and scheduled jobs?

  • The potential for data inconsistency arises due to the delayed execution of asynchronous business rules, necessitating careful design and conflict resolution strategies to reconcile concurrent updates. (correct)
  • Asynchronous business rules are exclusively designed to handle read-only operations, thereby precluding the possibility of data inconsistencies with concurrent update operations.
  • Data consistency is maintained through the inherent locking mechanisms of the database, which serialize all concurrent update operations regardless of the execution context.
  • Asynchronous business rules guarantee data consistency by executing in a separate transaction, preventing conflicts with UI actions and scheduled jobs.

Given a scenario where a complex ServiceNow form involves multiple onChange client scripts, UI policies, and data policies interacting with various fields: How would you optimize the execution order to minimize client-side latency and prevent potential conflicts or unintended behavior?

  • Deactivate all UI policies and rely solely on client scripts for form manipulation, thereby simplifying the execution order and reducing potential conflicts.
  • Prioritize the execution of UI policies over client scripts to ensure that UI elements are correctly configured before any data manipulation occurs.
  • Execute all `onChange` client scripts and UI policies asynchronously to prevent blocking the main thread and ensure a responsive user interface.
  • Implement a well-defined execution order based on the dependencies between fields and scripts, leveraging asynchronous GlideAjax calls to minimize the impact on form responsiveness. (correct)

In a scenario where a ServiceNow catalog item form submission triggers a workflow, several synchronous business rules, and numerous asynchronous business rules: What strategy would be most effective to ensure data integrity and prevent race conditions, while also optimizing performance?

  • Employ a combination of synchronous and asynchronous business rules, carefully orchestrating their execution order and utilizing GlideRecord methods to minimize database interactions, while implementing optimistic locking mechanisms. (correct)
  • Implement a comprehensive locking mechanism at the database level to serialize all transactions, guaranteeing data integrity at the expense of potential performance degradation.
  • Consolidate all business rules into a single, monolithic script to minimize the number of transactions and improve execution speed.
  • Convert all synchronous business rules into asynchronous ones to minimize the impact on the user experience, accepting the inherent risk of potential data inconsistencies.

Considering ServiceNow's modular architecture: How can you effectively manage dependencies between custom applications and system updates, ensuring that customizations remain functional and minimize the risk of unintended side effects?

<p>Isolate custom applications within their own namespaces and use the <code>GlideUpdateManager</code> API to manage dependencies and ensure compatibility with system updates. (C)</p>
Signup and view all the answers

In a ServiceNow environment using domain separation, how would you design a global business rule that must execute consistently across all domains while preventing unintended data leakage or cross-domain contamination?

<p>Implement a global business rule with explicit domain scoping, leveraging the <code>GlideDomainQuery</code> API and carefully managing domain visibility to prevent unintended data leakage or cross-domain contamination. (D)</p>
Signup and view all the answers

UI Actions Server code occurs after Before Business Rule (<1000).

<p>False (B)</p>
Signup and view all the answers

UI Actions Server code occurs before Before Business Rule (<1000)

<p>True (A)</p>
Signup and view all the answers

UI Actions Server code occurs after Before Business Rule (>1000)

<p>False (B)</p>
Signup and view all the answers

Choose the correct sequence

<p>UI Action Server &gt; Before Business Rule(&lt;1000) &gt; Workflow &gt; After Business Rule (&gt;1000) (D)</p>
Signup and view all the answers

UI Action occurs before onSubmit Client Script.

<p>True (A)</p>
Signup and view all the answers

UI Action occurs after onSubmit Client Script

<p>False (B)</p>
Signup and view all the answers

Choose the correct sequence

<p>onLoad Client Script &gt; onLoad UI Policy &gt; onChange Client Script &gt; onChange UI policy &gt; UI Action Client Script &gt; onSubmit Client Script (A)</p>
Signup and view all the answers

UI policies defines the behavior and visibility of fields on form:

<p>Mandatory (A), Visibility (B), Read-only (C), Clear value (D)</p>
Signup and view all the answers

UI policies can

<p>execute on form's field value change (A), execute on form load (@)</p>
Signup and view all the answers

UI Action Script runs when:

<p>Condition field returns TRUE (B), Trigger criteria is met (A)</p>
Signup and view all the answers

How to call UI Action on client side?

<p><code>gsftSubmit(null, g_form.getFormElement(), &quot;&lt;UI Action’s action-name&gt;&quot;)</code> (B)</p>
Signup and view all the answers

We can use current in UI Action Server

<p>True (A)</p>
Signup and view all the answers

The scratchpad object g_scratchpad is available on Display rules.

<p>True (A)</p>
Signup and view all the answers

Choose the correct answer

<p>ACL: read occurs before Before Business Rule (A), ACL: read occurs before UI Action Server (C), ACL: read occurs after Display Business Rule (D)</p>
Signup and view all the answers

By default, Flow runs in the

<p>background (A)</p>
Signup and view all the answers

By default, Flow runs

<p>asynchronously (A)</p>
Signup and view all the answers

Choose the correct sequence

<p>Query BR &gt; ACL: read &gt; Before BR (&lt;1000) &gt; Workflow &gt; Flow (frgrd)&gt; Before BR (&gt;1000) &gt; After Business Rule (B)</p>
Signup and view all the answers

By default, Flow runs after async Business Rule

<p>True (A)</p>
Signup and view all the answers

We should use Flow (default/ background) when we do not require immediate updates and to allow other system processes to run at the same time.

<p>True (A)</p>
Signup and view all the answers

Running a flow in foreground may block the current session thread and prevent user input until the flow finishes.

<p>True (A)</p>
Signup and view all the answers

Flashcards

Client Scripts

Scripts that execute on the client-side, typically in a web browser.

Business Rules

Scripts that execute on the server-side, handling data processing and logic.

OnLoad Client Script

Client-side scripts that run when a form is loaded.

UI Policy

Client-side logic determining field behavior based on conditions.

Signup and view all the flashcards

OnChange Client Script

Client-side scripts that run when a field value changes.

Signup and view all the flashcards

UI Actions

Buttons, links, and context menu items that perform actions in the UI.

Signup and view all the flashcards

OnSubmit Client Script

Client-side scripts that execute when a form is submitted.

Signup and view all the flashcards

Workflow

Used to automate complex business processes.

Signup and view all the flashcards

Data Policies

Enforce data consistency by preventing invalid data from being saved to tables.

Signup and view all the flashcards

Async Business Rule

Business rules executed asynchronously, without waiting for completion.

Signup and view all the flashcards

Study Notes

Script Execution Order in ServiceNow

  • The script execution order involves interactions between the user interface, client-side scripts, server-side scripts, and the database.

User Interaction Phase

  • A Form Request initiates client-side processing.

Client-Side Script Execution

  • OnLoad Client Scripts execute first.
  • OnLoad UI Policies follow the OnLoad Client Scripts.
  • OnChange Client Scripts and UI Policies run in response to form interactions.
  • UI Actions (Client) execute in response to user actions.
  • OnSubmit Client Scripts run when the form is submitted.

Server-Side Script Execution

  • UI Actions (Server) are triggered by form submission
  • Before Business Rules with order values less than 1000 execute.
  • Data Policies run after the "before" business rules
  • Workflows are initiated which can also trigger data policies.
  • Before Business Rules with order values greater than 1000 execute.
  • After Business Rules run after the "before" business rules.

Database Interactions

  • Query Business Rules execute database queries.
  • Database updates occur after "before" business rules

Returning to the User

  • Display Business Rules execute before returning the UI to the user.
  • Onload Client Script, UI Policies and Onchange Client Script and UI Policies run.
  • Async Business Rules execute.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Use Quizgecko on...
Open
Browser
Browser