QUESTION: 109

What is a good practice for a developer to follow when writing a trigger? (Choose 2)

Using @future methods to perform DML operations.
Using the Map data structure to hold query results by ID.
Using the Set data structure to ensure distinct records.
Using synchronous callouts to call external systems.

Answer(s): B,C

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QUESTION: 110

Which statement should a developer avoid using inside procedural loops? (Choose 2)

System.debug('Amount of CPU time (in ms) used so far: ' + Limits.getCpuTime() );
List contacts = [SELECT Id, Salutation, FirstName, LastName, Email FROM Contact WHERE AccountId = :a.Id];
If(o.accountId == a.id)
Update contactList;

Answer(s): B,D

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QUESTION: 111

A developer creates an Apex helper class to handle complex trigger logic. How can the helper class warn users when the trigger exceeds DML governor limits?

By using PageReference.setRedirect() to redirect the user to a custom Visualforce page before the number of DML statements is exceeded.
By using Messaging.sendEmail() to continue toe transaction and send an alert to the user after the number of DML statements is exceeded.
By using AmexMessage.Messages() to display an error message after the number of DML statements is exceeded.
By using Limits.getDMLRows() and then displaying an error message before the number of DML statements is exceeded.

Answer(s): D

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QUESTION: 112

How can a developer avoid exceeding governor limits when using Apex Triggers? (Choose 2)

By using a helper class that can be invoked from multiple triggers
By using Maps to hold data from query results
By using the Database class to handle DML transactions
By performing DML transactions on a list of sObjects.

Answer(s): B,D

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Free DEX-450 Exam Braindumps (page: 28)

QUESTION: 109

QUESTION: 110

QUESTION: 111

QUESTION: 112