Salesforce Platform Developer I (PD1) Exam Study Guide

What has been corrected on this page?

Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.

1. 11 July 2026 · corrected by Melik Can Sariyer

   2 flagged findings: a quote attributed to the generic institutional source 'Trailhead, Salesforce Developer Documentation' rather than any specific named article; a quote attributed to 'David Liu' with a specific unverified UI-question percentage (60-70%) -- this is the same unverified persona identified in a sibling article (salesforce-administrator-exam-automation-security-topics.md) attributed a DIFFERENT, conflicting book title there, confirming the author identity itself is unverified.

   Before

   "Understanding when to use SOQL versus SOSL is a frequent exam question. Use SOQL when you know which object to query. Use SOSL when you need to search across multiple objects or when you have a text search requirement." -- Trailhead, Salesforce Developer Documentation / "Lightning Web Components is the future of Salesforce UI development, but Visualforce is still relevant in exam and real-world contexts. Study both, but prioritize LWC. Expect 60-70% of UI questions to focus on LWC." -- David Liu, Salesforce Developer and author of Salesforce Developer Certification Study Guide / Reference list entry: Liu, David. Salesforce Developer Certification Study Guide. Apress, 2022.

   After

   Understanding when to use SOQL versus SOSL is a frequent exam question. Use SOQL when you know which object to query. Use SOSL when you need to search across multiple objects or when you have a text search requirement. / Lightning Web Components is the future of Salesforce UI development, but Visualforce is still relevant in exam and real-world contexts. Candidates should study both, but prioritize LWC, since the majority of UI-related exam questions focus on it.

   Why: De-attributed a quote incorrectly attributed to the generic institutional source 'Trailhead, Salesforce Developer Documentation' (not a specific citable article) and a quote attributed to 'David Liu' with an unverified 60-70% UI-question statistic. The 'David Liu' persona is confirmed unverified: a sibling article (salesforce-administrator-exam-automation-security-topics) attributes the same name a different, conflicting book title. Removed the now-orphaned David Liu reference-list entry entirely.

   View the full record →

Who checked this page?

1 contributor has checked "Salesforce Platform Developer I (PD1) Exam Study Guide" on Pass4Sure. Each name below links to that person's public CitePep profile, where every contribution they have made is listed with the exact change they proposed.