SNOW-CAD Practice Test 21 — 15 Questions

Question 1

A developer needs to create a custom application that tracks employee training completions. The application must allow managers to view a list of their direct reports' training records. Which ServiceNow Studio feature should be used to define the relationship between the Manager and Employee tables?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Create a Reference field on the Employee table pointing to the sys_user table.. A Reference field on the Employee table pointing to the sys_user table establishes a direct database relationship between the employee record and their manager record. This allows the platform to automatically resolve the manager's user record and enables out-of-the-box features like dot-walking and related list displays in ServiceNow Studio.

Answer

Write a Business Rule to populate a manager field.

Answer

Configure an Access Control Rule (ACL) to filter records.

Answer

Use the GlideRecord API to join the tables in a script.

Question 2

A developer creates a script include with client-callable true. The script include is used in a client script to validate a field. However, when the client script runs, it throws an error that GlideAjax is not defined. What is the most likely issue?

Accepted Answer

The client script is running in a UI policy instead of a client script.. The error 'GlideAjax is not defined' occurs when GlideAjax is used in a context that does not support it, such as a UI policy script. UI policies run on the server side and do not have access to client-side APIs like GlideAjax. Even though the script include is marked client-callable, the client script itself must be a true client script (e.g., onChange, onLoad) to use GlideAjax. Option B correctly identifies this scenario: the developer may have accidentally placed the script in a UI policy instead of a client script.

Answer

The script include is not marked as 'Client-callable'.

Answer

The script include is a global scope but the client script is in a scoped application.

Answer

The client script is not using the correct GlideAjax syntax.

Question 3

A developer is working on an application in Studio and needs to create a new table that extends a base table. Which step is essential?

Accepted Answer

Use the 'Create Application File' wizard and select 'Table'.. In Studio, the recommended way to create a new table is using the 'Create Application File' wizard and selecting 'Table'. Options A and D are not Studio-specific methods, and C is not a standard creation approach.

Answer

Import the table from an update set.

Answer

Use the Database Views module.

Answer

Define the table schema manually via script.

Question 4

You are a ServiceNow administrator for a large organization that uses a custom application to manage IT assets. The application has a business rule on the 'asset' table that runs 'after update' and logs changes to a separate audit table. Recently, users have reported that saving an asset record takes over 30 seconds, and the system performance has degraded. Upon investigation, you find that the business rule contains a GlideRecord query that retrieves all related asset history records for each update, and then performs additional calculations. The asset table has over 500,000 records, and each asset has an average of 50 history records. The business rule is triggered on every field update, including minor changes like last modified date. You need to improve the response time without losing the audit functionality. Which course of action should you take?

Accepted Answer

Add a condition to the business rule so that it only executes when specific important fields (e.g., status, assigned to) are changed.. Adding a condition to limit execution to only significant changes (e.g., important fields) reduces the frequency of the heavy operation. Option A is not valid because before business rules cannot write to a different table after the operation; they would need to use a separate script. Option C is incorrect because implementing the audit logic using a script include called from a UI policy is not suitable; UI policies are client-side and cannot perform server-side operations like writing to an audit table. Option D might cause delays if asynchronous execution is not properly configured, and it still runs the same operation; additionally, asynchronous business rules can lead to data consistency issues.

Answer

Change the business rule to run 'before' update to perform the audit logging earlier in the process.

Answer

Delete the business rule and implement the audit logic using a script include called from a UI policy.

Answer

Change the business rule to run asynchronously by selecting 'Run asynchronously' in the advanced view.

Question 5

Refer to the exhibit. A developer created this Script Include for use in a Service Portal widget. When calling the processor from a client script, the developer passes no 'sysparm_name' parameter. What will be the result?

Accepted Answer

The script will execute the processor's constructor only.. When a Script Include is invoked from a Service Portal widget via a processor, the processor's constructor runs automatically. If no 'sysparm_name' parameter is passed, the processor does not know which method to call, so only the constructor executes. The constructor typically initializes properties but does not return data, resulting in no output.

Answer

The script will return an empty array.

Answer

The script will throw an error because the method is not allowed.

Answer

The script will run the getData method by default.

Question 6

During a data migration, a developer runs a GlideRecord query to load 100,000 records from an external source into the 'incident' table. The script times out after 60 seconds. Which optimization technique would be most effective to avoid the timeout?

Accepted Answer

Use GlideRecordBatch or a scheduled job to process records in smaller batches.. Using GlideRecordBatch or a scheduled job with incremental processing breaks the workload into manageable chunks, preventing the script from timing out. Option A is incorrect because setLimit(1000) only limits the number of records returned per query, but the migration requires all 100,000 records to be processed; it does not solve the timeout issue when processing large batches. Option B is incorrect because GlideAggregate is used for aggregation queries (e.g., counting records) and does not assist in batch insertion of records. Option C is incorrect because increasing the transaction timeout is a temporary workaround; it does not address the underlying efficiency problem and may lead to other performance issues.

Answer

Use setLimit(1000) to reduce the number of records per execution.

Answer

Use GlideAggregate to count records before insertion.

Answer

Increase the transaction timeout setting in the system properties.

Question 7

A Service Portal widget displays a list of open incidents. The data is updated via a GlideAjax call in the client controller. Users report that the list does not refresh automatically when a new incident is created. The developer wants to implement auto-refresh without manual page reload. The widget is used on a dashboard that does not require real-time updates every second. Which approach is most efficient?

Accepted Answer

Use Angular $interval to call the GlideAjax every 30 seconds in the client controller. Using a polling interval (e.g., 30 seconds) strikes a balance between data freshness and server load. Option B is unnecessary since real-time updates are not required. Option C is inefficient due to full page reload. Option D misses updates when the user is not interacting.

Answer

Set up a real-time data channel using WebSocket and push updates from server

Answer

Use the 'spNavigation' API to reload the entire page every 30 seconds

Answer

Trigger the GlideAjax call on mouseover and focus events

Question 8

A developer created a custom form section for the 'change_request' table that contains a reference field to 'cmdb_ci'. The section is visible in the form layout for all change request types. However, when the 'type' field is set to 'Emergency', the section should not be visible. The developer added a UI Policy to hide the entire section when type is 'Emergency'. But the section remains visible. After checking, the UI Policy is active and the condition is set correctly. What is the most likely reason the UI Policy is not working, and what is the best fix?

Accepted Answer

UI Policies cannot hide form sections; they only control field-level visibility. The developer should hide each field in the section individually via UI Policy or use a client script to hide the section div. UI Policies in ServiceNow can only control the visibility of individual fields, not entire form sections. The developer must either hide each field in the section via separate UI Policy conditions or use a client script to hide the section's HTML div element. Option A is incorrect because UI Policies cannot directly target form sections. Option C is incorrect because there is no 'visible' attribute to assign. Option D is incorrect because the issue is not about order or priority.

Answer

The section's 'Visible' checkbox in the form layout must be unchecked and then controlled by the UI Policy

Answer

The UI Policy must be set to 'Run for all users' and the section must be assigned a 'visible' attribute

Answer

The UI Policy order is too low; it should be set to a higher priority number

Question 9

A company is integrating with an external HR system using a REST API to create and update user records in the sys_user table. The API endpoint requires a token that expires every 24 hours. The integration is scheduled to run hourly. The token is stored in a credential record. After a few days, the integration fails with a 401 Unauthorized error. The error log shows "Invalid token". What is the most likely cause?

Accepted Answer

The token was refreshed but the credential record was not updated.. The token expires every 24 hours, so after the first day, the stored token becomes invalid. The integration runs hourly and likely attempts to refresh the token, but if the refreshed token is not saved back to the credential record, the old token persists and causes the 401 error. Option A is correct because the most likely cause is that the token was refreshed but the credential record was not updated. The other options are less likely: there's no evidence the URL changed (B), the credential record was deleted (C), or the IP changed (D).

Answer

The REST API endpoint URL changed.

Answer

The credential record was deleted.

Answer

The IP address of the external system changed.

Question 10

An organization uses a scheduled data import to load incident data from an external system into ServiceNow. The import set runs successfully, but the transform map sometimes fails to update certain records because the unique key field (sys_id) from the source does not match the sys_id in ServiceNow due to a different format. The team wants to update existing records based on a custom 'external_id' field in the incident table, which is guaranteed to be unique and correctly populated from the source. The target table already has a unique index on 'external_id'. Which configuration should the developer implement to achieve reliable updates?

Accepted Answer

Create a new transform map with coalesce on the 'external_id' field and map the source field to incident.external_id.. By creating a new transform map with coalesce on the 'external_id' field, the system will use the 'external_id' value from the source to match existing records in the incident table. Since a unique index exists on 'external_id', this ensures reliable updates. Option A is incorrect because a database view does not affect import matching logic. Option B is wrong because coalesce on 'sys_id' would fail due to format differences. Option D does not address the matching issue—increasing frequency does not improve record matching.

Answer

Use a database view to join the import set and incident table on the external_id field.

Answer

Modify the existing transform map to use 'update' action and set coalesce on the sys_id field.

Answer

Increase the scheduled import frequency to overwrite the records.

Question 11

A developer creates a scheduled job that updates a custom table's records. The job runs successfully but the table's 'Updated' field does not reflect the correct time. What could be the reason?

Accepted Answer

The script used 'setWorkflow(false)' which bypasses the auto-update of the 'Updated' field.. The 'Updated' field is set automatically when a record is updated through the UI, but if the update is done via direct database update (e.g., using GlideRecord without setWorkflow(true)), the system might not update the field. Also, conditional or dirty flag may not set. However, the most likely is that the update script used setWorkflow(false) or bypassed the auto-update mechanism. Option A is wrong because performance of the job is not related. Option C is wrong because Access controls do not affect system fields like 'Updated'. Option D is wrong because the job's schedule time is irrelevant.

Answer

The scheduled job's schedule interval is longer than the update frequency.

Answer

The table does not have the appropriate record-level ACLs.

Answer

The scheduled job runs too fast for the system to record the update.

Question 12

A developer wants to create a responsive portal page that displays data in a two-column layout on desktop and a single column on mobile. Which approach should be used?

Accepted Answer

Use the Bootstrap grid with col-lg-6 and col-md-12 classes. Bootstrap's grid system with col-lg-6 and col-md-12 classes provides a responsive two-column to single-column transition. Column widgets are not for responsive layout.

Answer

Use a single-column layout with media queries

Answer

Use the Column widget in UI Builder

Answer

Use fixed-width tables

Question 13

Which TWO statements are true about using ServiceNow Studio for application development?

Accepted Answer

Studio provides a guided interface to create application files such as tables, business rules, and client scripts.. ServiceNow Studio provides a guided, low-code interface that simplifies the creation of application artifacts such as tables, business rules, client scripts, UI policies, and more. It offers wizards and templates to help developers build components without needing to manually write all the underlying XML or JavaScript from scratch, making it ideal for rapid application development within the Now Platform.

Answer

Studio requires a separate HI (High-Impact) instance to develop applications.

Answer

When creating a new application in Studio, a new scope is automatically generated without user input.

Answer

Studio can only be used by users with the admin role.

Question 14

A developer writes a Business Rule to calculate a total on an Aggregate field. The rule runs on 'insert' and 'update' on the parent table. However, the total is not updating correctly when child records are deleted. Why?

Accepted Answer

The Business Rule should be on the child table's delete event.. A Business Rule that runs on 'insert' and 'update' on the parent table will not fire when a child record is deleted, because the delete event occurs on the child table, not the parent. To correctly update an aggregate field on the parent when child records are deleted, the Business Rule must be defined on the child table's 'delete' event. This ensures the rule executes when the child record is removed, allowing the aggregate to be recalculated.

Answer

The Business Rule should use 'current' and 'previous' to detect deletion.

Answer

The Business Rule should also run on 'delete'.

Answer

The Business Rule should be a Global Business Rule.

Question 15

What is the primary purpose of the 'Theme and Branding' module in Service Portal?

Accepted Answer

To define global visual styles like colors and fonts. The Theme and Branding module allows administrators to define global styles such as colors, fonts, and logos that apply across all portal pages.

Answer

To create custom widgets

Answer

To manage portal page layouts

Answer

To configure portal security settings