":null,"nextQuestionUrl":null,"previousQuestionUrl":null,"domainPracticeUrl":null,"certificationUrl":null,"domainUrl":null,"hasAnswerOptions":true,"updatedAt":"2026-08-29T04:14:03.841384+00:00","questionType":"multi_select"},{"id":"a26b51b9-6533-4c05-b700-a7bb8fa2cc9f","slug":"an-apex-trigger-processes-a-list-of-case-records-the-develo-40vqw","certificationSlug":"salesforce-pd1","examCode":"SALESFORCE-PD1","examName":"Salesforce Certified Platform Developer I (SALESFORCE-PD1)","questionText":"An Apex trigger processes a list of Case records. The developer wants to group the cases by their AccountId. Which data structure is best suited for this grouping?","difficulty":"hard","domain":"Developer Fundamentals","domainSlug":"developer-fundamentals","topic":"","questionNumber":0,"totalQuestions":0,"options":[{"key":"A","isCorrect":false,"text":"List>","explanation":"A list of maps does not provide direct key-based lookup for grouping.","masteryContext":""},{"key":"B","isCorrect":false,"text":"Set>","explanation":"Maps cannot be elements of a Set because they are not hashable primitives.","masteryContext":""},{"key":"C","isCorrect":false,"text":"Map","explanation":"Map only allows one Case per AccountId, which fails if multiple cases share an account.","masteryContext":""},{"key":"D","isCorrect":true,"text":"Map>","explanation":"This structure supports multiple cases per AccountId.","masteryContext":""}],"correctOptionKey":"D","correctOptions":["D"],"correctAnswerText":"","isMultiSelect":false,"mainExplanation":"A Map where the key is the AccountId (Id) and the value is a List of Cases (List) allows efficient grouping of child records by parent ID.","examTrap":null,"examTip":null,"technicalDeepDive":null,"keyConcepts":[],"faqs":[],"eliminationLogic":null,"exhibitText":null,"exhibitUrl":null,"hasExhibit":false,"isExhibitQuestion":false,"questionPairs":null,"hasMatchingPairs":false,"isMatchingQuestion":false,"relatedQuestions":[],"breadcrumbItems":null,"nextQuestionUrl":null,"previousQuestionUrl":null,"domainPracticeUrl":null,"certificationUrl":null,"domainUrl":null,"hasAnswerOptions":true,"updatedAt":"2026-08-29T04:14:02.859067+00:00","questionType":"multiple_choice"},{"id":"78bc8daf-0e89-4d70-890d-6241ea48e9b9","slug":"a-developer-needs-to-store-a-collection-of-account-ids-where-i2uej","certificationSlug":"salesforce-pd1","examCode":"SALESFORCE-PD1","examName":"Salesforce Certified Platform Developer I (SALESFORCE-PD1)","questionText":"A developer needs to store a collection of Account IDs where duplicates are automatically prevented and lookups are extremely fast. Which collection type should the developer use?","difficulty":"easy","domain":"Developer Fundamentals","domainSlug":"developer-fundamentals","topic":"","questionNumber":0,"totalQuestions":0,"options":[{"key":"A","isCorrect":false,"text":"Map","explanation":"While maps prevent duplicate keys, they are intended for key-value pairs rather than a pure collection of unique IDs.","masteryContext":""},{"key":"B","isCorrect":false,"text":"Queue","explanation":"Queue is not a valid Apex collection type for data manipulation.","masteryContext":""},{"key":"C","isCorrect":false,"text":"List","explanation":"Lists allow duplicate elements and are ordered by index rather than optimized for unique lookups.","masteryContext":""},{"key":"D","isCorrect":true,"text":"Set","explanation":"Sets inherently prevent duplicate entries and offer optimal performance for membership checks.","masteryContext":""}],"correctOptionKey":"D","correctOptions":["D"],"correctAnswerText":"","isMultiSelect":false,"mainExplanation":"Sets in Apex store unique elements and provide very fast lookups by value using methods like contains().","examTrap":null,"examTip":null,"technicalDeepDive":null,"keyConcepts":[],"faqs":[],"eliminationLogic":null,"exhibitText":null,"exhibitUrl":null,"hasExhibit":false,"isExhibitQuestion":false,"questionPairs":null,"hasMatchingPairs":false,"isMatchingQuestion":false,"relatedQuestions":[],"brea