Apex Fundamentals PLATFORM-DEVELOPER-I Practice Questions (Page 4)

Questions 16–19

1. 16foundation · easy

   Which Apex collection type stores elements in a specific order and allows duplicate values?

   • AList
   • BsObject
   • CMap
   • DSet
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A developer is writing a method that queries for a single Account by ID. If no account is found, the method should return a default Account object. Which code snippet correctly handles this?

   • AAccount acc = [SELECT Id FROM Account WHERE Id = :accId LIMIT 1]; if (acc == null) { acc = new Account(Name='Default'); } return acc;
   • BList<Account> accs = [SELECT Id FROM Account WHERE Id = :accId]; Account acc = accs.isEmpty() ? new Account(Name='Default') : accs[0]; return acc;
   • CAccount acc = [SELECT Id FROM Account WHERE Id = :accId]; if (acc == null) { acc = new Account(Name='Default'); } return acc;
   • DAccount acc = [SELECT Id FROM Account WHERE Id = :accId]; if (acc == null) { acc = new Account(Name='Default'); } return acc;
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A developer has a list of custom object records that may already exist in the database. The developer wants to insert new records and update existing ones in a single operation, using a custom external ID field to match records. Which DML operation should be used?

   • Ainsert records;
   • Bupsert records External_Id__c;
   • Cupdate records;
   • Dmerge records;
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   Which DML operation is used to insert a new record or update an existing record in a single call?

   • Ainsert
   • Bupdate
   • Cupsert
   • Ddelete
   Reveal Solution Discussion Select an answer first