Describe the Impact of Schema Design and Modifications on Apex Development. PLATFORM-DEVELOPER-I Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   A developer adds a new required field to a custom object. What is the impact on existing Apex code that inserts records of that object?

   • AThe code will fail at runtime if it does not populate the new required field.
   • BThe code will be recompiled automatically to handle the new field.
   • CThe code will continue to work without changes because required fields are optional in Apex.
   • DThe code will automatically populate the field with a default value.
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2. 12expert · hard

   A developer is writing an Apex trigger that inserts child records when a parent record is created. The child object has a unique constraint on a field. The trigger processes a batch of parent records, and some child records have duplicate values for the unique field. What is the MOST efficient way to handle this in Apex?

   • AUse a try-catch block around the DML and ignore the exception
   • BQuery for existing records before inserting to avoid duplicates
   • CUse Database.insert with allOrNone=false and inspect the results to identify failures
   • DUse a regular DML insert and let the entire batch fail
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4. 13application · medium

   A developer is writing Apex code to insert a batch of Contact records. The Contact object has a unique external ID field. Some records in the batch have duplicate values for this field. What will happen when the DML operation is executed?

   • AOnly the duplicate records are rejected; the rest are inserted
   • BThe duplicates are inserted, but the external ID field is cleared for them
   • CThe entire batch is rejected with a DML exception
   • DThe duplicates are automatically deduplicated and only one is inserted
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5. 14foundation · easy

   Which schema feature is most likely to improve the performance of a SOQL query that filters on a custom field?

   • AChanging the field type to Text Area (Long)
   • BCreating a custom index on the field
   • CAdding the field to the page layout
   • DMaking the field required
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6. 15application · medium

   A developer is writing a test class that inserts a new Account with a required custom field. The field has a default value defined in the schema. Will the test class need to explicitly set the field?

   • AYes, but only if the field is also unique
   • BNo, the default value will be applied automatically during the insert
   • CYes, test classes must always set all fields explicitly
   • DNo, but only if the test uses the @isTest(SeeAllData=true) annotation
   Reveal Solution Discussion Select an answer first