ServiceNow CAD Exam 2026: Complete Study Guide

The CAD blueprint (KB0011498, January 2026) weights four domains at 20% and two at 10%:

The blueprint points to Welcome to ServiceNow, Scripting in ServiceNow Fundamentals and Application Development Fundamentals as recommended courses, and to the ServiceNow Developer site.

Many CAD questions are timing questions in disguise. If you can picture what happens when a user opens a form, changes a field and clicks save, you can rule out most wrong answers.

Client scripts run in the browser on forms; onSubmit can cancel the save by returning false (source). Before business rules run after submission but before the database write, so changes they make are saved with the record; after rules run once the write has happened; async rules run through a scheduled job; display rules run before the form is shown (source). Script includes hold shared server code and load only when called, which is why they are preferred over global business rules (source).

A Scripted REST API is a custom endpoint made of resources, each with an HTTP method and a script; you version it in the URI so existing integrations keep working, and callers must satisfy at least one REST_Endpoint ACL (source). Client-callable script includes are private by default, so guests on public pages can't run them unless you change that deliberately (source). Runtime access settings on the application decide whether API or web service calls can run against its tables at all (source).

The most effective CAD preparation is to build one small scoped application end to end in a personal instance, touching every domain. Pick something concrete, such as an equipment-loan tracker, and work through it in this order:

1. Design. Create the scoped app, two or three tables and the modules. Write down why each table is in your scope.
2. UI. Build the form, add onLoad and onChange client scripts, then a record producer as an alternative entry point.
3. Security. Add ACLs for a borrower role and a manager role, then test as each user. Try to break your own rules.
4. Automation. Add an approval flow in Flow Designer, an application property, and a script include used by a business rule.
5. External data. Import a spreadsheet of equipment, then expose a read-only Scripted REST endpoint for loan status.
6. Managing. Set up delegated development for a second user and add an ATF test you can run after changes, on your non-production instance (ATF).

Then switch to CAD practice questions. Every miss should send you back to the part of your app where that concept lives.

Illustrative scenarios, not exam questions.

• Exams are registered and paid for in ServiceNow University and scheduled through Pearson VUE; vouchers no longer exist (source). A May 2026 Community reply for a CAD candidate confirms this and notes you have 90 days to schedule and complete the exam once registered (source).
• The CAD exam fee is $300 USD excluding tax; a retake is $150 (source).
• Retake waits: 3 days before the second attempt, 30 days before the third, then 6 months (source).
• The cut score isn't published; exams are scored against a predetermined cut score that isn't shared (source).
• We haven't found a public ServiceNow source for the current CAD question count and time limit, so we don't quote one. Check the blueprint.

For costs across certifications, see ServiceNow certification cost in 2026.

Three free questions from our CAD bank are below. The rest, organised by blueprint area, are on the CAD practice questions page.