Describe the Best Practices for Unit Testing in Apex. PLATFORM-DEVELOPER-II Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   How does Test.stopTest() affect asynchronous Apex code in a test?

   • AIt causes asynchronous jobs to run synchronously before the test ends.
   • BIt has no effect on asynchronous jobs.
   • CIt cancels any asynchronous jobs that are pending.
   • DIt delays the execution of asynchronous jobs until after the test.
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2. 22application · medium

   A developer is testing a controller that uses the current user's profile to determine field-level security. The test must verify that a standard user cannot see a specific field. Which test pattern should the developer use?

   • AUse System.assertNotEquals() to compare the field visibility.
   • BUse @testSetup to create a standard user for all tests.
   • CUse System.runAs() with a standard user and assert that the field is not visible.
   • DUse Test.startTest() and Test.stopTest() to isolate the user context.
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4. 23application · medium

   A developer is testing a batch class that processes up to 5000 Account records. The class queries Accounts in the start() method and updates them in execute(). The developer wants to verify that the batch does not exceed the DML row limit. Which assertion should the developer use after Test.stopTest()?

   • ASystem.assertEquals(5000, [SELECT COUNT() FROM Account WHERE Processed__c = true]);
   • BSystem.assert(Limits.getDMLRows() < Limits.getLimitDMLRows());
   • CSystem.assertEquals(5000, Limits.getDMLRows());
   • DSystem.assertEquals(Limits.getDMLRows(), Limits.getLimitDMLRows());
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5. 24foundation · easy

   What does test isolation mean in the context of Apex unit tests?

   • ATest methods can share data with each other to improve performance.
   • BEach test method runs in its own transaction with a fresh set of data.
   • CTest methods can access data from the production org.
   • DTest methods must be run in a specific order to pass.
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6. 25foundation · easy

   What is a best practice for achieving high code coverage in Apex?

   • AUse @isTest(SeeAllData=true) to access production data for testing.
   • BWrite tests that only cover the most complex methods.
   • CTest only the positive scenarios to keep tests simple.
   • DCreate tests that cover both positive and negative scenarios.
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