SNOW-CAD Practice Test 22 — 15 Questions

Question 1

A developer is using an Import Set API to load data from an external system into a staging table. The external system sends records with a unique external ID, and the developer wants the transform to update existing target records when the external ID matches and insert new ones otherwise. Which configuration on the transform map ensures this behavior?

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

Accepted Answer

Set the coalesce field on the external ID field in the transform map.. Setting the coalesce field on the external ID is the correct way to make the transform map update existing records when a match is found and insert new ones when it is not. Insert-only transforms, staging business rules, or pre-emptive updates bypass or contradict the transform's matching logic and do not provide the required upsert behavior.

Answer

Configure a business rule on the staging table to check for existing records.

Answer

Enable the 'Insert only' option on the transform map.

Answer

Use a GlideRecord script in the staging table's before-insert business rule to update the target record.

Question 2

A developer is writing a before insert business rule on the Problem [problem] table that must stop the record from being saved when the 'short_description' field is empty. The developer writes: if (current.short_description.nil()) { current.setAbortAction(true); } but the record is still saved when the field is blank. What is the most likely cause?

Accepted Answer

The nil() method only returns true for undefined or null values, but an empty string is not undefined, so the condition never evaluates to true.. The abort action is correctly placed in a before insert rule, but the condition fails to detect a blank value. nil() is true only for null or undefined, while an empty string is defined and returns false. Checking for an empty string explicitly or using a length test ensures the abort fires and prevents the record from saving.

Answer

The business rule lacks the 'admin overrides' option, so the abort is silently suppressed for users with the admin role.

Answer

The business rule is running on the wrong table, so the abort action is ignored.

Answer

setAbortAction(true) is not supported in before insert business rules and must be used in an after insert rule.

Question 3

A developer is troubleshooting a Flow Designer action that calls an external REST API through a REST step. The action works in a subproduction instance but fails in production with a message that the connection was refused. The developer confirms the endpoint URL is identical in both instances and the vendor firewall allows the production instance's IP. Which platform component should the developer verify next?

Accepted Answer

Whether the REST step is configured to use a MID Server and whether a MID Server with the correct capabilities is up.. A connection refused that appears only in production points to the request egress path differing between environments. If the REST step routes through a MID Server, the call leaves from the MID Server host, so an absent or misconfigured MID Server in production produces exactly this symptom. Inbound plugins, UI roles, and Swagger imports do not govern outbound connectivity.

Answer

Whether the vendor API's Swagger definition is imported into the production instance.

Answer

Whether the production instance has the REST API plugin activated.

Answer

Whether the flow's Run as user has the rest_api_explorer role.

Question 4

A developer writes an after update business rule on the Problem [problem] table that performs a GlideRecord query to count related incidents and then updates the problem record's work_notes. Users report that saving a problem sometimes triggers an infinite loop or a recursion warning. Which change best resolves this?

Accepted Answer

Add a condition that checks whether the field being changed is work_notes, or set the rule's filter to exclude updates triggered by the rule itself.. An after update business rule that modifies the same record it runs on will re-trigger itself, producing recursion. The reliable remedy is to constrain when the rule fires: use a condition or filter that excludes updates where only work_notes changed, or check current.work_notes.changes() appropriately. This keeps the counting logic intact while preventing the rule from processing its own database write.

Answer

Disable the business rule's ability to update records by removing the 'Update' checkbox from the When to run section.

Answer

Change the business rule to run before update and use current.update() to persist the work_notes.

Answer

Convert the business rule to an async business rule so it executes outside the current transaction.

Question 5

A developer is creating a new application in ServiceNow Studio. The application must be deployable to another instance. Which Studio feature should the developer use to group application files for deployment?

Accepted Answer

Application package. Application packages in ServiceNow Studio are designed to bundle application files for deployment. They provide a controlled way to select which artifacts to include and can be published to the application repository or exported. Update sets and source control serve different purposes and are not the primary grouping feature for deploying a scoped application.

Answer

Application scope

Answer

Source control repository

Answer

Update set

Question 6

A developer is working in ServiceNow Studio on a scoped application that includes a client script. The client script needs to call a server-side script to validate data before the form is submitted. Which method should the developer use to invoke the server-side script from the client script?

Accepted Answer

GlideAjax. GlideAjax enables asynchronous calls from client scripts to server-side Script Includes. The Script Include must extend AbstractAjaxProcessor and define methods that can be called. The client script uses the GlideAjax class to specify the Script Include and method, then processes the response. This pattern is essential for server-side validation without submitting the form, and it is fully supported in scoped applications.

Answer

GlideRecord

Answer

gs.getUserID()

Answer

g_form.submit()

Question 7

A developer needs to prevent a user from deleting an Incident record that is in the 'Closed' state. The requirement is to block the deletion and show a message explaining why. Which approach uses the correct ServiceNow mechanism?

Accepted Answer

Create a before delete business rule that calls current.setAbortAction(true) and gs.addErrorMessage() when the state is Closed.. Deletion prevention is enforced server-side with a before delete business rule. At that timing the record still exists, so the script can evaluate the state and call setAbortAction(true) to cancel the operation. Pairing that with gs.addErrorMessage informs the user why the delete was rejected, satisfying both the blocking and messaging requirements.

Answer

Create an Access Control rule that denies delete on the incident table for all users.

Answer

Add a UI Policy that makes the delete button read-only when the incident state is Closed.

Answer

Create an after delete business rule that re-inserts the record using a GlideRecord insert when the state is Closed.

Question 8

A developer is building a scoped application in ServiceNow Studio. They need to create a server-side script that runs only when a specific field on a record changes from 'New' to 'In Progress'. Which Studio feature should they use to accomplish this?

Accepted Answer

Business Rule. The requirement is for server-side logic that triggers when a specific field changes from one value to another. A Business Rule is designed for this purpose, as it runs on the server during database operations and can be conditioned on field changes. Client Scripts run in the browser and are not suitable for server-side enforcement. Script Includes and UI Actions require explicit invocation and do not automatically respond to record changes.

Answer

UI Action

Answer

Script Include

Answer

Client Script

Question 9

A developer is writing a script include to encapsulate reusable logic that will be called from multiple business rules on different tables. The script include must be accessible from server-side business rules and should not expose its methods to client-side scripts. Which two actions should the developer take? (Choose two.)

Accepted Answer

Define the methods as public functions inside a class that extends nothing, and instantiate the class in the business rule.. To share server-side logic safely, the script include should be class-based and instantiated in each business rule, and the Client callable flag should be false to prevent GlideAjax access from the browser. This keeps the methods available to server scripts while blocking client-side calls. Global scope and UI actions do not address the server-only requirement.

Answer

Mark the script include as global so it can be called from any scope.

Answer

Use gs.include() inside each business rule to load the script include.

Answer

Add the script include to a UI action so it can be triggered from the form.

Question 10

A developer creates a custom table 'u_vehicle' that must reference the 'core_company' table to identify the manufacturer. The developer adds a new field of type Reference and selects 'core_company' as the reference table. Which additional configuration is required to ensure that only companies with the 'Manufacturer' type are selectable in the reference field?

Accepted Answer

Create a reference qualifier on the field using the condition 'type=Manufacturer'.. A reference qualifier is the correct mechanism to limit the records available in a reference field. By applying a condition such as 'type=Manufacturer', the lookup only displays companies of that type. This is declarative, maintainable, and scoped to the field, unlike business rules that affect the entire table or client scripts that only validate after selection.

Answer

Create a UI policy on the 'u_vehicle' form to hide companies that are not manufacturers.

Answer

Use a client script to validate the selected company and clear the field if the type is not 'Manufacturer'.

Answer

Add a before query business rule on the 'core_company' table that filters records based on the type.

Question 11

A developer is building a custom scoped application for facilities management. The application needs a new table to store maintenance requests, and records must be visible in the ServiceNow Task-based workflow engine so they can be assigned to users and tracked with SLA timers. Which base table should the custom table extend to meet this requirement?

Accepted Answer

The Task [task] table. Task [task] is the generic base table that provides assignment, state, priority, and SLA fields, and it integrates with Task-based workflow and assignment rules. Extending Task means the new maintenance table inherits this behavior immediately, so users can be assigned records and SLAs can be applied without manually building those capabilities.

Answer

The Configuration Item [cmdb_ci] table

Answer

The Incident [incident] table

Answer

The User [sys_user] table

Question 12

A developer is creating a new scoped application in ServiceNow Studio. They want to ensure that the application's source code can be version-controlled and easily deployed to other instances. Which feature should they use?

Accepted Answer

Source Control Integration. Source Control Integration is the feature in ServiceNow Studio that connects an application to a Git repository, enabling developers to manage code versions, collaborate, and deploy changes. It supports standard Git workflows such as branching and merging, which are essential for maintaining code quality and facilitating deployment across instances.

Answer

Application Scope

Answer

Application Repository

Answer

Update Sets

Question 13

A developer needs to add a new field to the 'u_vehicle' table that stores a calculated value: the number of days since the vehicle's last service date. The calculation must always be available when the record is queried via REST API and should not be stored in the database. Which field type should the developer use?

Accepted Answer

Calculated. A Calculated field is designed to compute values on the fly using a script without storing data in the database. Because it is evaluated at query time, the days-since-service value remains accurate and is accessible through the REST API. Storing the value in an Integer field would require updates and could become stale, while Formula and UI policy approaches do not provide a server-side computed field.

Answer

Integer with a business rule

Answer

String with a UI policy

Answer

Formula

Question 14

A developer needs to add a new field to the 'u_vehicle' custom table to store the vehicle's license plate number. The field must accept only alphanumeric characters and be searchable in list views. Which field type should the developer choose?

Accepted Answer

String. A String field is the correct choice because it stores free-form text and is searchable in list views. License plates are alphanumeric values that do not fit numeric, choice, or reference types. While String does not natively enforce alphanumeric-only input, that can be achieved with additional configuration, making it the only viable base type among the options.

Answer

Integer

Answer

Reference

Answer

Choice

Question 15

A developer is creating a scoped application in ServiceNow Studio and needs to ensure that the application can be easily deployed and maintained across instances. Which two actions should the developer take? (Choose two.)

Accepted Answer

Use application packages to bundle all application files for deployment.. Using application packages ensures that all application files are bundled and deployed consistently, while linking to source control provides version tracking and collaboration. Together, these practices enable reliable deployment and long-term maintenance. Other options either mix deployment methods, compromise scope isolation, or rely on manual processes that are not scalable.

Answer

Manually copy each record from one instance to another using export/import XML.

Answer

Create update sets for each change and manually transfer them to other instances.

Answer

Disable application scope to allow global access to all application files.