Study Platform Developer I
PDIEverything you need to prepare: flashcards to build vocabulary, learning tests to study topic by topic, timed exams that simulate the real thing, and a browsable question bank with explanations and references. About this certification →
Unlock all of Platform Developer I
One certification plan opens every flashcard set, test, timed exam, and question bank here.
Flashcards
Term & definition · self-checkNew to this certification? Take a flashcards tour first to estimate your knowledge level and see where to focus before the practice learning tests.
Practice learning tests
Shorter, untimed quizzes to study and reinforce individual topics, with an explanation after every question.
Practice Test 1 — Apex Fundamentals & TriggersFree demo
Apex syntax, collections, triggers, governor limits and order of execution.
Practice Test 2 — SOQL, Testing & Lightning Components🔒 Premium
Queries, asynchronous Apex, unit testing requirements and Lightning Web Components.
Practice Test 3 — Governor Limits & Asynchronous Apex🔒 Premium
Bulkification, governor limits, @future, Batch, Queueable and Scheduled Apex.
Practice Test 4 — Data, DML & Exception Handling🔒 Premium
DML statements vs Database methods, sObjects, relationships in Apex, and exceptions.
Practice Test 5 — Lightning Web Components, Integration & Security🔒 Premium
LWC essentials, Lightning Data Service, Apex integration, callouts and Apex security.
Study by exam domain
PDI · 30 questionsThe 4 domains of Platform Developer I. This vendor does not publish a weighting, so the split below is even — treat it as a checklist rather than a forecast.
No published weighting for this exam — domains shown evenly. Or browse the whole question bank →
Practice exams
Timed · exam simulationFull-length, timed exams that mimic the real certification — the correct number of questions and time limit, with sourced references for every answer.
Practice Exam A — Timed Simulation🔒 Premium
Full-length timed simulation modeled on the real Platform Developer I exam (105 minutes, pass 68%). 60 exam-style questions across all domains, with references.
Practice Exam B — Timed Simulation🔒 Premium
Full-length timed simulation modeled on the real Platform Developer I exam (105 minutes, pass 68%). 60 exam-style questions across all domains, with references.
Practice Exam C — Timed Simulation🔒 Premium
Full-length timed simulation modeled on the real Platform Developer I exam (105 minutes, pass 68%). 60 exam-style questions across all domains, with references. Additional practice set — questions may overlap other exams but none repeats within this exam.
Practice Exam D — Timed Simulation🔒 Premium
Full-length timed simulation modeled on the real Platform Developer I exam (105 minutes, pass 68%). 60 exam-style questions across all domains, with references. Additional practice set — questions may overlap other exams but none repeats within this exam.
Practice Exam E — Timed Simulation🔒 Premium
Full-length timed simulation modeled on the real Platform Developer I exam (105 minutes, pass 68%). 60 exam-style questions across all domains, with references. Additional practice set — questions may overlap other exams but none repeats within this exam.
Mock exams
Randomized · you choose the level6 timed exams built on demand, with questions drawn at random from every practice exam and question bank in Platform Developer I at the difficulty mix you pick. Every run counts towards your readiness score and shows which domains to work on next.
Exam question bank
Browse · by topicStudy real exam-style questions grouped by official exam topics — reveal the correct answer, explanation, and sourced references for each one.