The Salesforce Certified Platform Developer I credential is intended for individuals who have knowledge, skills, and experience building custom applications on the Lightning Platform. This credential encompasses the fundamental programmatic capabilities of the Lightning Platform to develop custom business logic and interfaces to extend Salesforce using Apex and Visualforce. To achieve this credential, a candidate must successfully pass the Salesforce Certified Platform Developer I exam. This exam is also a prerequisite to the Salesforce Certified Platform Developer II Multiple Choice exam. This exam guide provides information about the Salesforce Certified Platform Developer I exam.