Apex Fundamentals and Best Practices PLATFORM-DEVELOPER-II Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A developer is writing a batch Apex class that processes up to 10,000 Account records. Inside the execute method, the code queries related Contacts for each Account using a SOQL query inside a for loop, then updates the Contacts. The developer notices that the batch job frequently fails with a System.LimitException. Which change will most effectively resolve the issue?

   • AUse a savepoint before the loop and roll back if a limit is exceeded.
   • BIncrease the batch size to 2000 records.
   • CMove the SOQL query outside the loop and use a Map to associate Accounts with Contacts.
   • DWrap the SOQL query in a try-catch block to catch the System.LimitException.
   Reveal Solution Discussion Select an answer first
2. 2expert · hard

   An Apex method performs a series of DML operations: it inserts Accounts, then updates Contacts, and finally inserts Opportunities. The developer wants to ensure that if any DML operation fails, the entire transaction is rolled back, but also wants to log the error and send an email notification. Which approach should be used?

   • AWrap the entire sequence in a try-catch block, catch the exception, log it, and rethrow it after sending the email.
   • BUse Database DML with allOrNothing set to false for each operation.
   • CUse a savepoint before each DML operation and roll back to the last savepoint on failure.
   • DCatch the exception, log it, and continue without rethrowing.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A developer writes a method that returns the first Account record that matches a given name. The method uses a SOQL query. Which return type should the method declare?

   • AList<Account>
   • BSObject
   • CList<SObject>
   • DAccount
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   A developer needs to construct a SOQL query at runtime where the field name is stored in a variable. Which dynamic Apex feature should be used?

   • ADynamic SOQL
   • BDynamic SOSL
   • CSchema.describeSObjects
   • DDynamic DML
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   In an Apex transaction, what is the purpose of a savepoint?

   • ATo create a new transaction for subsequent DML operations
   • BTo prevent any DML operations from being rolled back
   • CTo mark a point in the transaction to which you can roll back if an exception occurs
   • DTo commit all DML operations to the database permanently
   Reveal Solution Discussion Select an answer first