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Updated: Jul 22, 2026
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Salesforce DEX-403E (Declarative Development for Platform App Builders in Lightning- Extended) Certification Exam is designed for individuals who are seeking to enhance their knowledge and skills in building applications on the Salesforce platform. DEX-403E exam is specifically designed to test the candidate's ability to design and develop custom applications using declarative tools in the Lightning platform.
The Declarative Development for Platform App Builders in Lightning- Extended certification exam consists of 60 multiple-choice and multiple-select questions which need to be completed within 105 minutes. Candidates need to score at least 63% to pass the exam and become a certified Salesforce DEX-403E professional. DEX-403E exam fee is $200, and it can be taken either online or on-site at a testing center.
Salesforce DEX-403E is an advanced certification exam designed for experienced Salesforce platform app builders who want to demonstrate their expertise in declarative development using the Lightning Experience. DEX-403E exam evaluates the candidate's ability to design, develop and deploy custom applications on the Salesforce platform using declarative tools and techniques. Declarative Development for Platform App Builders in Lightning- Extended certification also validates the candidate's understanding of the Salesforce data model, security model, and business logic.
Salesforce DEX-403E Exam Overview:
| Certification Vendor: | Salesforce |
| Exam Name: | Declarative Development for Platform App Builders in Lightning- Extended |
| Exam Number: | DEX-403E |
| Related Certifications: | Salesforce Certified Administrator Salesforce Certified Platform Developer I |
| Real Exam Qty: | 60 |
| Available Languages: | English, Japanese, Spanish, French, German |
| Exam Price: | USD 200 |
| Exam Format: | Multiple-choice, Multiple-select |
| Exam Duration: | 105 minutes |
| Passing Score: | 70% |
| Certificate Validity Period: | 12 months (requires annual maintenance) |
| Recommended Training: | Declarative Development for Platform App Builders Platform App Builder Trailmix |
| Exam Registration: | Trailhead Academy Registration Kryterion Webassessor Scheduling |
| Sample Questions: | Salesforce DEX-403E Sample Questions |
| Exam Way: | Online proctored (remote) or onsite at Kryterion test centers |
| Pre Condition: | Recommended: Salesforce Certified Administrator or equivalent experience |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/platform-app-builder |
Salesforce DEX-403E Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Salesforce Fundamentals | 10% | - Lightning Platform architecture - Multi-tenant environment - Sandbox types and usage |
| User Interface Customization | 15% | - Lightning App Builder - Record types and page layouts - Quick actions and custom tabs - Lightning record/home/app pages |
| Business Logic and Automation | 25% | - Approval processes - Validation rules and formula fields - Workflow rules and Process Builder - Flow Builder (screen, record-triggered, platform event flows) - Order of execution |
| Security and Access Control | 15% | - Field-level security - Organization-wide defaults - Profiles and permission sets - Role hierarchy and sharing rules |
| Reports and Dashboards | 10% | - Dashboard components and sharing - Report types and formats - Filtering and grouping |
| Data Modeling and Management | 20% | - Data validation and quality - Data import/export tools - Custom objects and fields - Relationship types (lookup, master-detail, many-to-many) |
| Application Deployment | 5% | - Declarative vs programmatic considerations - Change sets - Deployment best practices |
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